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X-Ray and Radio Polarimetry of the Neutron Star Low-mass X-Ray Binary 4U 1728–34
Unnati Kashyap, Thomas J. Maccarone, Thomas D. Russell, Mason Ng, Swati Ravi, Eliot C. Pattie and Herman L. Marshall The Astrophysical Journal 985(2) 245 (2025) https://doi.org/10.3847/1538-4357/adceb9
XRISM insights for interstellar sulfur
Lía Corrales, Elisa Costantini, Sascha Zeegers, Liyi Gu, Hiromitsu Takahashi, David Moutard, Megumi Shidatsu, Jon M Miller, Misaki Mizumoto, Randall K Smith, Ralf Ballhausen, Priyanka Chakraborty, María Díaz Trigo, Renee Ludlam, Takao Nakagawa, Ioanna Psaradaki, Shinya Yamada and Caroline A Kilbourne Publications of the Astronomical Society of Japan (2025) https://doi.org/10.1093/pasj/psaf068
A Spectro-temporal View of Normal Branch Oscillations in Cygnus X-2 as Seen by NICER and NuSTAR
Malu Sudha, Renee M. Ludlam, Diego Altamirano, Edward M. Cackett and Jeremy Hare The Astrophysical Journal 978(1) 75 (2025) https://doi.org/10.3847/1538-4357/ad9588
Accretion Onto Weakly Magnetized Neutron Stars: Polarization Theory and Its Application to X‐Ray Burster GX 13+1
Modulation of X-Ray Flux by Obscuration of Neutron Star Boundary Layer
G. Török, K. Klimovičová, D. Lančová, M. Matuszková, E. Šrámková, M. Urbanec, M. Čemeljić, R. Šprňa and V. Karas The Astrophysical Journal 981(1) 10 (2025) https://doi.org/10.3847/1538-4357/adad71
Timing and Spectral Analysis of 4U 1626-67 Using AstroSat/LAXPC
Correlated spectro-polarimetric study along the Z track in XTE J1701–462 puts constraints on its coronal geometry
Wei Yu, Qingcui Bu, Victor Doroshenko, Lorenzo Ducci, Long Ji, Wenda Zhang, Andrea Santangelo, Shuangnan Zhang, Anand Waghmare, Mingyu Ge, Yue Huang, Hexin Liu, Lian Tao, Zixu Yang, Liang Zhang and Jinlu Qu Astronomy & Astrophysics 695 A108 (2025) https://doi.org/10.1051/0004-6361/202349041
Quenching and Recovery of Persistent X-Ray Emission during a Superburst in 4U 1820–30
Zhijiao Peng, Zhaosheng Li, Yuanyue Pan, Tao Fu, Wenhui Yu, Yupeng Chen, Shu Zhang, Maurizio Falanga and Shuang-Nan Zhang The Astrophysical Journal 982(1) 18 (2025) https://doi.org/10.3847/1538-4357/adb726
Insight–HXMT observations of thermonuclear X-ray bursts from 4U 1608–52 in the low/hard state: the energy-dependent hard X-ray deficit and cooling saturation of the corona
Y P Chen, S Zhang, L Ji, S N Zhang, J Q Peng, L D Kong, Z Chang, Q C Shui, L Tao, J L Qu, M Y Ge and J Li Monthly Notices of the Royal Astronomical Society 531(1) 1756 (2024) https://doi.org/10.1093/mnras/stae1257
X-ray spectropolarimetric characterization of GX 340+0 in the horizontal branch: A highly inclined source?
Fabio La Monaca, Alessandro Di Marco, Renee M. Ludlam, Anna Bobrikova, Juri Poutanen, Songwei Li and Fei Xie Astronomy & Astrophysics 691 A253 (2024) https://doi.org/10.1051/0004-6361/202451966
X-Ray Spectral and Temporal Properties of LMXB 4U 1608-52—Observed with AstroSat and NICER
Sree Bhattacherjee, Ankur Nath, Biplob Sarkar, Aru Beri, Suchismito Chattopadhyay, Yashpal Bhulla and Ranjeev Misra The Astrophysical Journal 971(2) 154 (2024) https://doi.org/10.3847/1538-4357/ad583d
Radiation mechanism of twin kilohertz quasi-periodic oscillations in neutron star low-mass X-ray binaries
Discovery of a strong rotation of the X-ray polarization angle in the galactic burster GX 13+1
Anna Bobrikova, Sofia V. Forsblom, Alessandro Di Marco, Fabio La Monaca, Juri Poutanen, Mason Ng, Swati Ravi, Vladislav Loktev, Jari J. E. Kajava, Francesco Ursini, Alexandra Veledina, Daniele Rogantini, Tuomo Salmi, Stefano Bianchi, Fiamma Capitanio, Chris Done, Sergio Fabiani, Andrea Gnarini, Jeremy Heyl, Philip Kaaret, Giorgio Matt, Fabio Muleri, Anagha P. Nitindala, John Rankin, Martin C. Weisskopf, et al. Astronomy & Astrophysics 688 A170 (2024) https://doi.org/10.1051/0004-6361/202449318
The Effects of Cooling on Boundary Layer Accretion
The IXPE View of Neutron Star Low-Mass X-ray Binaries
Francesco Ursini, Andrea Gnarini, Fiamma Capitanio, Anna Bobrikova, Massimo Cocchi, Alessandro Di Marco, Sergio Fabiani, Ruben Farinelli, Fabio La Monaca, John Rankin, Mary Lynne Saade and Juri Poutanen Galaxies 12(4) 43 (2024) https://doi.org/10.3390/galaxies12040043
The polarization of the boundary layer around weakly magnetized neutron stars in X-ray binaries
X-Ray Polarimetry of the Dipping Accreting Neutron Star 4U 1624–49
M. Lynne Saade, Philip Kaaret, Andrea Gnarini, Juri Poutanen, Francesco Ursini, Stefano Bianchi, Anna Bobrikova, Fabio La Monaca, Alessandro Di Marco, Fiamma Capitanio, Alexandra Veledina, Iván Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, et al. The Astrophysical Journal 963(2) 133 (2024) https://doi.org/10.3847/1538-4357/ad235a
Spectral and timing evolution of GX 340+0 along its Z-track
Suchismito Chattopadhyay, Yashpal Bhulla, Ranjeev Misra and Soma Mandal Monthly Notices of the Royal Astronomical Society 528(4) 6167 (2024) https://doi.org/10.1093/mnras/stae389
New polarimetric study of the galactic X-ray burster GX 13+1
Anna Bobrikova, Alessandro Di Marco, Fabio La Monaca, Juri Poutanen, Sofia V. Forsblom and Vladislav Loktev Astronomy & Astrophysics 688 A217 (2024) https://doi.org/10.1051/0004-6361/202450207
Highly Significant Detection of X-Ray Polarization from the Brightest Accreting Neutron Star Sco X-1
Fabio La Monaca, Alessandro Di Marco, Juri Poutanen, Matteo Bachetti, Sara Elisa Motta, Alessandro Papitto, Maura Pilia, Fei Xie, Stefano Bianchi, Anna Bobrikova, Enrico Costa, Wei Deng, Ming-Yu Ge, Giulia Illiano, Shu-Mei Jia, Henric Krawczynski, Eleonora Veronica Lai, Kuan Liu, Guglielmo Mastroserio, Fabio Muleri, John Rankin, Paolo Soffitta, Alexandra Veledina, Filippo Ambrosino, Melania Del Santo, et al. The Astrophysical Journal Letters 960(2) L11 (2024) https://doi.org/10.3847/2041-8213/ad132d
Spectro-temporal and type I X-ray burst analysis of GX 3+1 using AstroSat observations
Neal Titus Thomas, S B Gudennavar and S G Bubbly Monthly Notices of the Royal Astronomical Society 521(1) 433 (2023) https://doi.org/10.1093/mnras/stad555
Spectral and temporal studies of Swift J1658.2–4242 using AstroSat observations with the JeTCAF model
Polarization Properties of the Weakly Magnetized Neutron Star X-Ray Binary GS 1826–238 in the High Soft State
Fiamma Capitanio, Sergio Fabiani, Andrea Gnarini, Francesco Ursini, Carlo Ferrigno, Giorgio Matt, Juri Poutanen, Massimo Cocchi, Romana Mikusincova, Ruben Farinelli, Stefano Bianchi, Jari J. E. Kajava, Fabio Muleri, Celia Sanchez-Fernandez, Paolo Soffitta, Kinwah Wu, Iván Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, et al. The Astrophysical Journal 943(2) 129 (2023) https://doi.org/10.3847/1538-4357/acae88
AstroSat View of the Neutron Star Low-mass X-Ray Binary GX 340+0
Accretion geometry of the neutron star low mass X-ray binary Cyg X-2 from X-ray polarization measurements
R Farinelli, S Fabiani, J Poutanen, F Ursini, C Ferrigno, S Bianchi, M Cocchi, F Capitanio, A De Rosa, A Gnarini, F Kislat, G Matt, R Mikusincova, F Muleri, I Agudo, L A Antonelli, M Bachetti, L Baldini, W H Baumgartner, R Bellazzini, S D Bongiorno, R Bonino, A Brez, N Bucciantini, S Castellano, et al. Monthly Notices of the Royal Astronomical Society 519(3) 3681 (2023) https://doi.org/10.1093/mnras/stac3726
Detection of lags in an atoll source 4U 1728-34 using AstroSat
Relativistic X-ray reflection and photoionized absorption in the neutron star low-mass X-ray binary GX 13+1
Enzo A Saavedra, Federico García, Federico A Fogantini, et al. Monthly Notices of the Royal Astronomical Society 522(3) 3367 (2023) https://doi.org/10.1093/mnras/stad1157
Analytical techniques for polarimetric imaging of accretion flows in the Schwarzschild metric
vKompth: a variable Comptonization model for low-frequency quasi-periodic oscillations in black hole X-ray binaries
Candela Bellavita, Federico García, Mariano Méndez and Konstantinos Karpouzas Monthly Notices of the Royal Astronomical Society 515(2) 2099 (2022) https://doi.org/10.1093/mnras/stac1922
Insight-HXMT Observation of 4U 1608–52: Evidence of Interplay between a Thermonuclear Burst and Accretion Environment
Yu-Peng Chen, Shu Zhang, Long Ji, Shuang-Nan Zhang, Ling-Da Kong, Peng-Ju Wang, Zhi Chang, Jing-Qiang Peng, Jin-Lu Qu and Jian Li The Astrophysical Journal 936(1) 46 (2022) https://doi.org/10.3847/1538-4357/ac87a0
Anticorrelated lags in a neutron star Z source GX 5-1: AstroSat’s View
Exploring the inner-disc region of the atoll source 4U 1705-44 using AstroSat’s SXT and LAXPC observations
S Malu, K Sriram, S Harikrishna and Vivek K Agrawal Monthly Notices of the Royal Astronomical Society 506(4) 6203 (2021) https://doi.org/10.1093/mnras/stab1892
Yuhan Yao, S. R. Kulkarni, K. C. Gendreau, Gaurava K. Jaisawal, Teruaki Enoto, Brian W. Grefenstette, Herman L. Marshall, Javier A. García, R. M. Ludlam, Sean N. Pike, Mason Ng, Liang Zhang, Diego Altamirano, Amruta Jaodand, S. Bradley Cenko, Ronald A. Remillard, James F. Steiner, Hitoshi Negoro, Murray Brightman, Amy Lien, Michael T. Wolff, Paul S. Ray, Koji Mukai, Zorawar Wadiasingh, Zaven Arzoumanian, et al. The Astrophysical Journal 920(2) 121 (2021) https://doi.org/10.3847/1538-4357/ac15f8
Study on the Energy Limits of kHz QPOs in Sco X-1 with RXTE and Insight-HXMT Observations
S. M. Jia, J. L. Qu, F. J. Lu, S. N. Zhang, S. Zhang, Y. Huang, D. H. Wang, D. K. Zhou, G. C. Xiao, Q. C. Bu, L. Chen, X. Ma, L. M. Song, L. Tao, X. L. Cao, Y. Chen, C. Z. Liu and Y. P. Xu The Astrophysical Journal 913(2) 119 (2021) https://doi.org/10.3847/1538-4357/abf6d5
Timing Neutron Stars: Pulsations, Oscillations and Explosions
Mariano Méndez and Tomaso M. Belloni Astrophysics and Space Science Library, Timing Neutron Stars: Pulsations, Oscillations and Explosions 461 263 (2021) https://doi.org/10.1007/978-3-662-62110-3_6
Thermonuclear X-Ray Bursts with Late Secondary Peaks Observed from 4U 1608–52
Tolga Güver, Tuğba Boztepe, Ersin Göğüş, Manoneeta Chakraborty, Tod E. Strohmayer, Peter Bult, Diego Altamirano, Gaurava K. Jaisawal, Tuğçe Kocabıyık, C. Malacaria, Unnati Kashyap, Keith C. Gendreau, Zaven Arzoumanian and Deepto Chakrabarty The Astrophysical Journal 910(1) 37 (2021) https://doi.org/10.3847/1538-4357/abe1ae
Kilohertz quasi-periodic oscillations in neutron-star X-ray binaries: flattening of the lag spectrum with increasing luminosity
Boundary layers of accretion discs: Discovery of vortex-driven modes and other waves
Matthew S B Coleman, Roman R Rafikov and Alexander A Philippov Monthly Notices of the Royal Astronomical Society 509(1) 440 (2021) https://doi.org/10.1093/mnras/stab2962
Mechanical model of a boundary layer for the parallel tracks of kilohertz quasi-periodic oscillations in accreting neutron stars
Modeling the Upper kHz QPOs of 4U 1728-34 with X-Ray Reverberation
Benjamin M. Coughenour, Edward M. Cackett, Philippe Peille and Jon S. Troyer The Astrophysical Journal 889(2) 136 (2020) https://doi.org/10.3847/1538-4357/ab6597
Disappearance of the Fe K α emission line in ultracompact X-ray binaries 4U 1543−624 and Swift J1756.9−2508
Filippos Koliopanos, Georgios Vasilopoulos, Sebastien Guillot and Natalie Webb Monthly Notices of the Royal Astronomical Society 500(4) 5603 (2020) https://doi.org/10.1093/mnras/staa3490
Coronal vertical structure variations in normal branch of GX 17+2: AstroSat’s SXT and LAXPC perspective
Observing imprints of black hole event horizon on X-ray spectra
Srimanta Banerjee, Marat Gilfanov, Sudip Bhattacharyya and Rashid Sunyaev Monthly Notices of the Royal Astronomical Society 498(4) 5353 (2020) https://doi.org/10.1093/mnras/staa2788
Lens Flare: Magnified X-Ray Binaries as Passive Beacons in SETI
The Comptonizing medium of the neutron star in 4U 1636 − 53 through its lower kilohertz quasi-periodic oscillations
Konstantinos Karpouzas, Mariano Méndez, Evandro M Ribeiro, et al. Monthly Notices of the Royal Astronomical Society 492(1) 1399 (2020) https://doi.org/10.1093/mnras/stz3502
Detection of thermonuclear X-ray bursts and dips from the X-ray binary 4U 1323-62 with AstroSat/LAXPC
Multiwavelength power-spectrum analysis of NGC 5548
C Panagiotou, I E Papadakis, E S Kammoun and M Dovčiak Monthly Notices of the Royal Astronomical Society 499(2) 1998 (2020) https://doi.org/10.1093/mnras/staa2920
The parallel tracks of kHz QPOs in low-mass X-ray binary 4U 1728−34: explorer of the bimodal accretion modes
The amplitude of the kilohertz quasi-periodic oscillations in 4U 1636–53 in the frequency-energy space
Evandro M Ribeiro, Mariano Méndez, Marcio G B de Avellar, Guobao Zhang and Konstantinos Karpouzas Monthly Notices of the Royal Astronomical Society 489(4) 4980 (2019) https://doi.org/10.1093/mnras/stz2463
AstroSat observation of GX 5–1: spectral and timing evolution
Epicyclic Oscillations in the Hartle–Thorne External Geometry
Gabriela Urbancová, Martin Urbanec, Gabriel Török, Zdeněk Stuchlík, Martin Blaschke and John C. Miller The Astrophysical Journal 877(2) 66 (2019) https://doi.org/10.3847/1538-4357/ab1b4c
Changes in the pulse phase dependence of X-ray emission lines in 4U 1626−67 with a torque reversal
Aru Beri, Biswajit Paul and Gulab C Dewangan Monthly Notices of the Royal Astronomical Society 475(1) 999 (2018) https://doi.org/10.1093/mnras/stx3121
On one-parametric formula relating the frequencies of twin-peak quasi-periodic oscillations
Gabriel Török, Kateřina Goluchová, Eva Šrámková, Jiří Horák, Pavel Bakala and Martin Urbanec Monthly Notices of the Royal Astronomical Society: Letters 473(1) L136 (2018) https://doi.org/10.1093/mnrasl/slx177
NICER Detects a Soft X-Ray Kilohertz Quasi-periodic Oscillation in 4U 0614+09
Peter Bult, Diego Altamirano, Zaven Arzoumanian, Edward M. Cackett, Deepto Chakrabarty, John Doty, Teruaki Enoto, Keith C. Gendreau, Sebastien Guillot, Jeroen Homan, Gaurava K. Jaisawal, Frederick K. Lamb, Renee M. Ludlam, Simin Mahmoodifar, Craig Markwardt, Takashi Okajima, Sam Price, Tod E. Strohmayer and Luke Winternitz The Astrophysical Journal Letters 860(1) L9 (2018) https://doi.org/10.3847/2041-8213/aac893
Kilohertz QPOs in low-mass X-ray binaries as oscillation modes of tori around neutron stars – I
Marcio G B de Avellar, Oliver Porth, Ziri Younsi and Luciano Rezzolla Monthly Notices of the Royal Astronomical Society 474(3) 3967 (2018) https://doi.org/10.1093/mnras/stx3071
A NICER Look at the Aql X-1 Hard State
Peter Bult, Zaven Arzoumanian, Edward M. Cackett, Deepto Chakrabarty, Keith C. Gendreau, Sebastien Guillot, Jeroen Homan, Gaurava K. Jaisawal, Laurens Keek, Steve Kenyon, Frederick K. Lamb, Renee Ludlam, Simin Mahmoodifar, Craig Markwardt, Jon M. Miller, Gregory Prigozhin, Yang Soong, Tod E. Strohmayer and Phil Uttley The Astrophysical Journal Letters 859(1) L1 (2018) https://doi.org/10.3847/2041-8213/aac2e2
Broadband Spectrum of the X-ray Binary M33 X-6 from NuSTAR and Swift–XRT Data: An Extragalactic Z-Source?
A Hard Look at the Neutron Stars and Accretion Disks in 4U 1636-53, GX 17+2, and 4U 1705-44 with NuStar
R. M. Ludlam, J. M. Miller, M. Bachetti, D. Barret, A. C. Bostrom, E. M. Cackett, N. Degenaar, T. Di Salvo, L. Natalucci, J. A. Tomsick, F. Paerels and M. L. Parker The Astrophysical Journal 836(1) 140 (2017) https://doi.org/10.3847/1538-4357/836/1/140
X-ray burst-induced spectral variability in 4U 1728–34
Variable spreading layer in 4U 1608–52 during thermonuclear X-ray bursts in the soft state
J. J. E. Kajava, K. I. I. Koljonen, J. Nättilä, V. Suleimanov and J. Poutanen Monthly Notices of the Royal Astronomical Society 472(1) 78 (2017) https://doi.org/10.1093/mnras/stx1963
A dichotomy between the hard state spectral properties of black hole and neutron star X-ray binaries
Relation between spectral changes and the presence of the lower kHz QPO in the neutron star low-mass X-ray binary 4U 1636−53
Guobao Zhang, Mariano Méndez, Andrea Sanna, Evandro M. Ribeiro and Joseph D. Gelfand Monthly Notices of the Royal Astronomical Society 465(4) 5003 (2017) https://doi.org/10.1093/mnras/stw3100
MHD simulations of oscillating cusp-filling tori around neutron stars – missing upper kHz QPO
Varadarajan Parthasarathy, Włodzimierz Kluźniak and Miljenko Čemeljić Monthly Notices of the Royal Astronomical Society: Letters 470(1) L34 (2017) https://doi.org/10.1093/mnrasl/slx070
Relation between the properties of the kilohertz quasi-periodic oscillations and spectral parameters in 4U 1636−53
Evandro M. Ribeiro, Mariano Méndez, Guobao Zhang and Andrea Sanna Monthly Notices of the Royal Astronomical Society 471(1) 1208 (2017) https://doi.org/10.1093/mnras/stx1686
The Stochastic X-Ray Variability of the Accreting Millisecond Pulsar MAXI J0911–655
Basic parameters of the helium-accreting X-ray bursting neutron star in 4U 1820−30
Valery F. Suleimanov, Jari J. E. Kajava, Sergey V. Molkov, et al. Monthly Notices of the Royal Astronomical Society 472(4) 3905 (2017) https://doi.org/10.1093/mnras/stx2234
The origin of the hard X-ray tail in neutron-star X-ray binaries
Phase lags of quasi-periodic oscillations across source states in the low-mass X-ray binary 4U 1636–53
Marcio G. B. de Avellar, Mariano Méndez, Diego Altamirano, Andrea Sanna and Guobao Zhang Monthly Notices of the Royal Astronomical Society 461(1) 79 (2016) https://doi.org/10.1093/mnras/stw1271
A NEW CORRELATION WITH LOWER KILOHERTZ QUASI-PERIODIC OSCILLATION FREQUENCY IN THE ENSEMBLE OF LOW-MASS X-RAY BINARIES
Iron-line and continuum variations in the XMM–Newton and Suzaku spectra of the neutron-star low-mass X-ray binary 4U 1636−53
Ming Lyu, Mariano Méndez, Andrea Sanna, et al. Monthly Notices of the Royal Astronomical Society 440(2) 1165 (2014) https://doi.org/10.1093/mnras/stu279
The effect of accretion on the measurement of neutron star mass and radius in the low-mass X-ray binary 4U 1608−52
Juri Poutanen, Joonas Nättilä, Jari J. E. Kajava, et al. Monthly Notices of the Royal Astronomical Society 442(4) 3777 (2014) https://doi.org/10.1093/mnras/stu1139
Atmospheres and radiating surfaces of neutron stars
An imperfect double: probing the physical origin of the low-frequency quasi-periodic oscillation and its harmonic in black hole binaries
Magnus Axelsson, Chris Done and Linnea Hjalmarsdotter Monthly Notices of the Royal Astronomical Society 438(1) 657 (2014) https://doi.org/10.1093/mnras/stt2236
Hard X-ray emission of Sco X-1
Mikhail G. Revnivtsev, Sergey S. Tsygankov, Eugene M. Churazov and Roman A. Krivonos Monthly Notices of the Royal Astronomical Society 445(2) 1205 (2014) https://doi.org/10.1093/mnras/stu1831
A thin diffuse component of the Galactic ridge X-ray emission and heating of the interstellar medium contributed by the radiation of Galactic X-ray binaries
The influence of accretion geometry on the spectral evolution during thermonuclear (type I) X-ray bursts
Jari J. E. Kajava, Joonas Nättilä, Outi-Marja Latvala, et al. Monthly Notices of the Royal Astronomical Society 445(4) 4218 (2014) https://doi.org/10.1093/mnras/stu2073
Time lags of the kilohertz quasi-periodic oscillations in the low-mass X-ray binaries 4U 1608−52 and 4U 1636−53
Marcio G. B. de Avellar, Mariano Méndez, Andrea Sanna and Jorge E. Horvath Monthly Notices of the Royal Astronomical Society 433(4) 3453 (2013) https://doi.org/10.1093/mnras/stt1001
X-ray diagnostics of chemical composition of the accretion disc and donor star in ultra-compact X-ray binaries
Filippos Koliopanos, Marat Gilfanov and Lars Bildsten Monthly Notices of the Royal Astronomical Society 432(2) 1264 (2013) https://doi.org/10.1093/mnras/stt542
Deep hard X-ray survey of the Large Magellanic Cloud
S. A. Grebenev, A. A. Lutovinov, S. S. Tsygankov and I. A. Mereminskiy Monthly Notices of the Royal Astronomical Society 428(1) 50 (2013) https://doi.org/10.1093/mnras/sts008