Issue |
A&A
Volume 629, September 2019
|
|
---|---|---|
Article Number | A80 | |
Number of page(s) | 27 | |
Section | Planets and planetary systems | |
DOI | https://doi.org/10.1051/0004-6361/201834729 | |
Published online | 12 September 2019 |
Catalog for the ESPRESSO blind radial velocity exoplanet survey★
1
Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP,
Rua das Estrelas, 4150-762 Porto, Portugal
e-mail: saeed.hojjatpanah@astro.up.pt
2
Departamento de Fisica e Astronomia, Faculdade de Ciências, Universidade do Porto,
Rua Campo Alegre, 4169-007 Porto, Portugal
3
European Southern Observatory, Alonso de Cordova 3107,
Vitacura,
Santiago, Chile
4
Physikalisches Institut & Center for Space and Habitability, Universität Bern,
Gesellschaftsstrasse 6,
3012 Bern, Switzerland
5
INAF – Osservatorio Astronomico di Trieste,
Via G. B. Tiepolo 11,
Trieste 34143, Italy
6
INFN – National Institute for Nuclear Physics,
via Valerio 2,
34127 Trieste, Italy
7
Instituto de Astrofísica de Canarias, Vía Láctea s/n,
38205 La Laguna, Tenerife, Spain
8
Universidad de La Laguna (ULL), Departamento de Astrofísica,
38206 La Laguna,
Tenerife, Spain
9
INAF – Osservatorio Astrofisico di Catania,
Via S. Sofia, 78, 95123 Catania, Italy
10
INAF – Osservatorio Astronomico di Palermo,
Piazza del Parlamento 1,
90134 Palermo, Italy
11
Instituto Federal do Paraná, 85860000, Campus Foz do Iguaçu, Foz do Iguaçu-PR, Brazil
12
Casimiro Montenegro Filho Astronomy Center, Itaipu Technological Park,
85867-900 Foz do Iguaçu-PR, Brazil
13
Institut für Astrophysik, Georg-August-Universität,
Friedrich-Hund-Platz 1,
37077 Göttingen, Germany
14
Observatoire Astronomique de l’Université de Genève,
1290 Versoix, Switzerland
15
INAF – Osservatorio Astronomico di Brera,
Via E. Bianchi 46, 23807 Merate (LC), Italy
16
Fundación Galileo Galilei – INAF, Rambla José Ana Fernandez Pérez 7,
38712 – Breña Baja, Spain
17
Departamento de Ciencias Fisicas, Universidad Andres Bello,
Fernandez Concha 700, Las Condes, Santiago, Chile
18
Consejo Superior de Investigaciones Científicas (CSIC)
19
Centro de Astrobiología (CSIC-INTA),
Carretera Ajalvir km 4, 28850 Torrejon de Ardoz, Madrid, Spain
Received:
27
November
2018
Accepted:
29
July
2019
Aims. One of the main scientific drivers for ESPRESSO, Échelle SPectrograph, is the detection and characterization of Earth-class exoplanets. With this goal in mind, the ESPRESSO guaranteed time observations (GTO) Catalog identifies the best target stars for a blind search for the radial velocity (RV) signals caused by Earth-class exoplanets.
Methods. Using the most complete stellar catalogs available, we screened for the most suitable G, K, and M dwarf stars for the detection of Earth-class exoplanets with ESPRESSO. For most of the stars, we then gathered high-resolution spectra from new observations or from archival data. We used these spectra to spectroscopically investigate the existence of any stellar binaries, both bound or background stars. We derived the activity level using chromospheric activity indexes using log (R′HK), as well as the projected rotational velocity v sin i. For the cases where planet companions are already known, we also looked at the possibility that additional planets may exist in the host’s habitable zone using dynamical arguments.
Results. We estimated the spectroscopic contamination level, v sin i, activity, stellar parameters and chemical abundances for 249 of the most promising targets. Using these data, we selected 45 stars that match our criteria for detectability of a planet like Earth. The stars presented and discussed in this paper constitute the ESPRESSO GTO catalog for the RV blind search for Earth-class planets. They can also be used for any other work requiring a detailed spectroscopic characterization of stars in the solar neighborhood.
Key words: planetary systems / planets and satellites: composition / techniques: radial velocities / techniques: spectroscopic / stars: abundances
Based on observations collected at the La Silla Observatory, ESO(Chile), with the HARPS spectrograph at the 3.6-m telescope for program 97.C − 0561(A), data obtained at the Paranal Observatory of the European Southern Observatory with UVES at VLT for program 097.C − 0561(B) and data obtained at the TNG telescope for program A33TAC_7, and also 95 programs. The large list is presented in Table B.1.
© ESO 2019
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