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Influence of Collisions with Hydrogen on Titanium Abundance Determinations in Cool Stars

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The First Light Curve Modeling and Orbital Period Change Investigation of Nine Contact Binaries around the Short-period Cutoff

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A Tale of Two Transition Disks: ALMA Long-baseline Observations of ISO-Oph 2 Reveal Two Closely Packed Nonaxisymmetric Rings and a ∼2 au Cavity

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HST/FGS Trigonometric Parallaxes of M-dwarf Eclipsing Binaries

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Planetary candidates transiting cool dwarf stars from campaigns 12 to 15 of K2

A Castro González, E Díez Alonso, J Menéndez Blanco, et al.
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Detection of PAH Absorption and Determination of the Mid-infrared Diffuse Interstellar Extinction Curve from the Sight Line toward Cyg OB2-12

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Characterization of very wide companion candidates to young stars with planets and disks

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A Kinematic View of NGC 1261: Structural Parameters, Internal Dispersion, Absolute Proper Motion, and Blue Straggler Stars

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The Astrophysical Journal 895 (1) 15 (2020)
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Obliquity Constraints on an Extrasolar Planetary-mass Companion

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https://doi.org/10.3847/1538-3881/ab76c6

Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations

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Spectroscopic and photometric time series of the bright RRc star T Sex

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https://doi.org/10.1093/mnras/staa3452

Age dating the Galactic bar with the nuclear stellar disc

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Assessing Spectroscopic Binary Multiplicity Properties Using Robo-AO Imaging

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Pleiades or Not? Resolving the Status of the Lithium-rich M Dwarfs HHJ 339 and HHJ 430

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Asteroseismic Modeling of Gravity Modes in Slowly Rotating A/F Stars with Radiative Levitation

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OGLE-ing the Magellanic System: Cepheids in the Bridge*

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KR Persei, a Mid-F Eclipsing Binary with a One-day Period

James R. Sowell, Emily Hollingworth, Francis C. Fekel, Matthew W. Muterspaugh, Horace Dale, Alexander D. Savello, Jeffrey L. Coughlin and Richard M. Williamon
The Astronomical Journal 160 (1) 13 (2020)
https://doi.org/10.3847/1538-3881/ab9094

Evryscope-South Survey of Upper- and Pre-main Sequence Solar Neighborhood Stars

Nathan W. Galliher, Jeffrey K. Ratzloff, Hank Corbett, et al.
Publications of the Astronomical Society of the Pacific 132 (1017) 114202 (2020)
https://doi.org/10.1088/1538-3873/abb010

Predicting the dark matter velocity distribution in galactic structures: tests against hydrodynamic cosmological simulations

Thomas Lacroix, Arturo Núñez-Castiñeyra, Martin Stref, Julien Lavalle and Emmanuel Nezri
Journal of Cosmology and Astroparticle Physics 2020 (10) 031 (2020)
https://doi.org/10.1088/1475-7516/2020/10/031

The Villafranca catalog of Galactic OB groups

J. Maíz Apellániz, P. Crespo Bellido, R. H. Barbá, R. Fernández Aranda and A. Sota
Astronomy & Astrophysics 643 A138 (2020)
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NLTE C and O abundances in RR lyrae stars

Sergei M. Andrievsky, George Wallerstein, Sergey A. Korotin, Valery V. Kovtyukh, Sergii V. Khrapaty, Yuri Rydyak, Tamara V. Mishenina and Wenjin Huang
Astronomische Nachrichten 341 (9) 899 (2020)
https://doi.org/10.1002/asna.202013831

X-Ray Observations of the Peculiar Cepheid V473 Lyr Identify A Low-mass Companion*

Nancy Remage Evans, Ignazio Pillitteri, Laszlo Molnar, Laszlo Szabados, Emese Plachy, Robert Szabo, Scott Engle, Edward Guinan, Scott Wolk, H. Moritz Günther, Hilding Neilson, Massimo Marengo, Lynn D. Matthews, Sofia Moschou, Jeremy J. Drake, Vinay Kashyap, Pierre Kervella, Tamas Tordai, Peter Somogyi and Gilbert Burki
The Astronomical Journal 159 (3) 121 (2020)
https://doi.org/10.3847/1538-3881/ab7121

The Gemini Planet Imager Exoplanet Survey: Dynamical Mass of the Exoplanet β Pictoris b from Combined Direct Imaging and Astrometry

Eric L. Nielsen, Robert J. De Rosa, Jason J. Wang, Johannes Sahlmann, Paul Kalas, Gaspard Duchêne, Julien Rameau, Mark S. Marley, Didier Saumon, Bruce Macintosh, Maxwell A. Millar-Blanchaer, Meiji M. Nguyen, S. Mark Ammons, Vanessa P. Bailey, Travis Barman, Joanna Bulger, Jeffrey Chilcote, Tara Cotten, Rene Doyon, Thomas M. Esposito, Michael P. Fitzgerald, Katherine B. Follette, Benjamin L. Gerard, Stephen J. Goodsell, James R. Graham, et al.
The Astronomical Journal 159 (2) 71 (2020)
https://doi.org/10.3847/1538-3881/ab5b92

The Big Sibling of AU Mic: A Cold Dust-rich Debris Disk around CP−72 2713 in the β Pic Moving Group

Attila Moór, Nicole Pawellek, Péter Ábrahám, Ágnes Kóspál, Krisztián Vida, András Pál, Anne Dutrey, Emmanuel Di Folco, A. Meredith Hughes, Quentin Kral and Ilaria Pascucci
The Astronomical Journal 159 (6) 288 (2020)
https://doi.org/10.3847/1538-3881/ab8f98

A Random Forest Approach to Identifying Young Stellar Object Candidates in the Lupus Star-forming Region

Elizabeth Melton
The Astronomical Journal 159 (5) 200 (2020)
https://doi.org/10.3847/1538-3881/ab72ac

California-Kepler Survey. IX. Revisiting the Minimum-mass Extrasolar Nebula with Precise Stellar Parameters

Fei Dai, Joshua N. Winn, Kevin Schlaufman, Songhu Wang, Lauren Weiss, Erik A. Petigura, Andrew W. Howard and Min Fang
The Astronomical Journal 159 (6) 247 (2020)
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Identification of a Group III CEMP-no Star in the Dwarf Spheroidal Galaxy Canes Venatici I

Jinmi Yoon, Devin D. Whitten, Timothy C. Beers, Young Sun Lee, Thomas Masseron and Vinicius M. Placco
The Astrophysical Journal 894 (1) 7 (2020)
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Diagonal Ridge Pattern of Different Age Populations Found in Gaia-DR2 with LAMOST Main-sequence Turnoff and OB-type Stars

H.-F. Wang, Y. Huang, H.-W. Zhang, M. López-Corredoira, W.-Y. Cui, B.-Q. Chen, R. Guo and J. Chang
The Astrophysical Journal 902 (1) 70 (2020)
https://doi.org/10.3847/1538-4357/abb3c8

Chandra Observations of High-energy X-Ray Sources Discovered by INTEGRAL

John A. Tomsick, Arash Bodaghee, Sylvain Chaty, Maïca Clavel, Francesca M. Fornasini, Jeremy Hare, Roman Krivonos, Farid Rahoui and Jerome Rodriguez
The Astrophysical Journal 889 (1) 53 (2020)
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Variability in the Massive Open Cluster NGC 1817 from K2: A Rich Population of Asteroseismic Red Clump, Eclipsing Binary, and Main-sequence Pulsating Stars

Eric L. Sandquist, Dennis Stello, Torben Arentoft, Karsten Brogaard, Frank Grundahl, Andrew Vanderburg, Anne Hedlund, Ryan DeWitt, Taylor R. Ackerman, Miguel Aguilar, Andrew J. Buckner, Christian Juarez, Arturo J. Ortiz, David Richarte, Daniel I. Rivera and Levi Schlapfer
The Astronomical Journal 159 (3) 96 (2020)
https://doi.org/10.3847/1538-3881/ab68df

The enigmatic globular cluster UKS 1 obscured by the bulge: H-band discovery of nitrogen-enhanced stars

José G. Fernández-Trincado, Dante Minniti, Timothy C. Beers, et al.
Astronomy & Astrophysics 643 A145 (2020)
https://doi.org/10.1051/0004-6361/202039328

The little things matter: relating the abundance of ultrafaint satellites to the hosts’ assembly history

Carlos S Frenk, Vasily Belokurov, Alis J Deason and Sownak Bose
Monthly Notices of the Royal Astronomical Society 495 (1) 743 (2020)
https://doi.org/10.1093/mnras/staa1199

Individual dynamical masses of DENIS J063001.4−184014AB reveal a likely young brown dwarf triple

J Sahlmann, T J Dupuy, A J Burgasser, et al.
Monthly Notices of the Royal Astronomical Society 500 (4) 5453 (2020)
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XMM–Newton study of X-ray sources in the field of Willman 1 dwarf spheroidal galaxy★

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Monthly Notices of the Royal Astronomical Society 499 (3) 3111 (2020)
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A Multiwavelength Search for Intrinsic Linear Polarization in Wolf–Rayet Winds

Andrew G. Fullard, Nicole St-Louis, Anthony F. J. Moffat, Vilppu E. Piirola, Nadine Manset and Jennifer L. Hoffman
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https://doi.org/10.3847/1538-3881/ab8293

Pulsation and rotation in NGC 6811: the Kepler short-cadence stars

E Rodríguez, L A Balona, M J López-González, et al.
Monthly Notices of the Royal Astronomical Society 491 (3) 4345 (2020)
https://doi.org/10.1093/mnras/stz3143

Machine learning applied to multifrequency data in astrophysics: blazar classification

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Monthly Notices of the Royal Astronomical Society 498 (2) 1750 (2020)
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Weighing in on black hole binaries with bpass: LB-1 does not contain a 70 M⊙ black hole

H F Stevance, D T H Steeghs, A R Casey, et al.
Monthly Notices of the Royal Astronomical Society 495 (3) 2786 (2020)
https://doi.org/10.1093/mnras/staa1324

Measuring the matter density of the Galactic disc using stellar streams

Sofia Sivertsson, Pablo F de Salas, Khyati Malhan and Axel Widmark
Monthly Notices of the Royal Astronomical Society 496 (3) 3112 (2020)
https://doi.org/10.1093/mnras/staa1741

Exoplanets in the Antarctic Sky. IV. Dual-band Photometry of Variables Found by the CSTAR-II Commissioning Survey at the North Sky

Jiapeng 鹏 Zhu 朱嘉, Hui 辉 Zhang 张, En-Si Liang, Zhouyi Yu, Ming Yang, Ji-lin Zhou, Xiangqun Cui, Fujia Du, Xuefei Gong, Bozhong Gu, Lei Hu, Peng Jiang, Huigen Liu, Xiaoyan Li, Zhengyang Li, Jeremy Mould, Tianrui Sun, Nicholas B. Suntzeff, Charling Tao, Qiguo Tian, Syed A. Uddin, Lifan Wang, Songhu Wang, Xiaofeng Wang, Peng Wei, et al.
The Astronomical Journal 159 (4) 172 (2020)
https://doi.org/10.3847/1538-3881/ab7449

Variable stars in the Sh 2-170 H ii region

Tirthendu Sinha, Saurabh Sharma, A K Pandey, et al.
Monthly Notices of the Royal Astronomical Society 493 (1) 267 (2020)
https://doi.org/10.1093/mnras/staa206

Galaxy Clusters Selected via the Sunyaev–Zel’dovich Effect in the SPTpol 100-square-degree Survey

N. Huang, L. E. Bleem, B. Stalder, P. A. R. Ade, S. W. Allen, A. J. Anderson, J. E. Austermann, J. S. Avva, J. A. Beall, A. N. Bender, B. A. Benson, F. Bianchini, S. Bocquet, M. Brodwin, J. E. Carlstrom, C. L. Chang, H. C. Chiang, R. Citron, C. Corbett Moran, T. M. Crawford, A. T. Crites, T. de Haan, M. A. Dobbs, W. Everett, B. Floyd, et al.
The Astronomical Journal 159 (3) 110 (2020)
https://doi.org/10.3847/1538-3881/ab6a96

Large-misalignment mechanism for the formation of compact axion structures: Signatures from the QCD axion to fuzzy dark matter

Asimina Arvanitaki, Savas Dimopoulos, Marios Galanis, et al.
Physical Review D 101 (8) (2020)
https://doi.org/10.1103/PhysRevD.101.083014

Constraining Orbital Periods from Nonconsecutive Observations: Period Estimates for Long-period Planets in Six Systems Observed by K2 During Multiple Campaigns

S. Dholakia, S. Dholakia, Andrew W. Mayo and Courtney D. Dressing
The Astronomical Journal 159 (3) 93 (2020)
https://doi.org/10.3847/1538-3881/ab594c

TOI-677b: A Warm Jupiter (P = 11.2 days) on an Eccentric Orbit Transiting a Late F-type Star

Andrés Jordán, Rafael Brahm, Néstor Espinoza, Thomas Henning, Matías I. Jones, Diana Kossakowski, Paula Sarkis, Trifon Trifonov, Felipe Rojas, Pascal Torres, Holger Drass, Sangeetha Nandakumar, Mauro Barbieri, Allen Davis, Songhu Wang, Daniel Bayliss, Luke Bouma, Diana Dragomir, Jason D. Eastman, Tansu Daylan, Natalia Guerrero, Thomas Barclay, Eric B. Ting, Christopher E. Henze, George Ricker, et al.
The Astronomical Journal 159 (4) 145 (2020)
https://doi.org/10.3847/1538-3881/ab6f67

Analysis of eclipsing binaries in multiple stellar systems: the case of V1200 Centauri

F Marcadon, K G Hełminiak, J P Marques, et al.
Monthly Notices of the Royal Astronomical Society 499 (2) 3019 (2020)
https://doi.org/10.1093/mnras/staa3040

Subaru Near-infrared Imaging Polarimetry of Misaligned Disks around the SR 24 Hierarchical Triple System*

Satoshi Mayama, Sebastián Pérez, Nobuhiko Kusakabe, Takayuki Muto, Takashi Tsukagoshi, Michael L. Sitko, Michihiro Takami, Jun Hashimoto, Ruobing Dong, Jungmi Kwon, Saeko S. Hayashi, Tomoyuki Kudo, Masayuki Kuzuhara, Katherine Follette, Misato Fukagawa, Munetake Momose, Daehyeon Oh, Jerome de Leon, Eiji Akiyama, John P. Wisniewski, Yi Yang, Lyu Abe, Wolfgang Brandner, Timothy D. Brandt, Michael Bonnefoy, et al.
The Astronomical Journal 159 (1) 12 (2020)
https://doi.org/10.3847/1538-3881/ab5850

Density-based outlier scoring on Kepler data

Daniel K Giles and Lucianne Walkowicz
Monthly Notices of the Royal Astronomical Society 499 (1) 524 (2020)
https://doi.org/10.1093/mnras/staa2736

Spin clusters inside four young asteroid groups

F Spoto, L G M Ramos and V Carruba
Monthly Notices of the Royal Astronomical Society 493 (2) 2556 (2020)
https://doi.org/10.1093/mnras/staa447

Spectroscopic analysis of accretion/ejection signatures in the Herbig Ae/Be stars HD 261941 and V590 Mon

Y Lebreton, E Alecian, A P Sousa, S H P Alencar and T Moura
Monthly Notices of the Royal Astronomical Society 494 (3) 3512 (2020)
https://doi.org/10.1093/mnras/staa695

Exploratory Spectroscopy of Magnetic Cataclysmic Variables Candidates and Other Variable Objects. II

A. S. Oliveira, C. V. Rodrigues, M. Martins, M. S. Palhares, K. M. G. Silva, I. J. Lima and F. J. Jablonski
The Astronomical Journal 159 (3) 114 (2020)
https://doi.org/10.3847/1538-3881/ab6ded

Similar but different: the varied landscape of Onfp/Oef stars variability

Gregor Rauw and Yaël Nazé
Monthly Notices of the Royal Astronomical Society 500 (2) 2096 (2020)
https://doi.org/10.1093/mnras/staa3310