The CARMENES search for exoplanets around M dwarfs. High-resolution optical and near-infrared spectroscopy of 324 survey stars
The CARMENES search for exoplanets around M dwarfs. High-resolution optical and near-infrared spectroscopy of 324 survey stars
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CARMENES 搜索 M 矮星周围的系外行星 324 颗巡天恒星的高分辨率光学和近红外光谱
DOI:
10.1051/0004-6361/201732054
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发表时间:
2018
影响因子:
6.5
通讯作者:
Quirrenbach
中科院分区:
文献类型:
--
作者:
Reiners;Zechmeister;Caballero;Morales;Jeffers;Schöfer;Tal-Or;Quirrenbach
The CARMENES radial velocity (RV) survey is observing 324 M dwarfs to search for any orbiting planets. In this paper, we present the survey sample by publishing one CARMENES spectrum for each M dwarf. These spectra cover the wavelength range 520–1710 nm at a resolution of at leastR>80 000, and we measure its RV, Hαemission, and projected rotation velocity. We present an atlas of high-resolution M-dwarf spectra and compare the spectra to atmospheric models. To quantify the RV precision that can be achieved in low-mass stars over the CARMENES wavelength range, we analyze our empirical information on the RV precision from more than 6500 observations. We compare our high-resolution M-dwarf spectra to atmospheric models where we determine the spectroscopic RV information content,Q, and signal-to-noise ratio. We find that for all M-type dwarfs, the highest RV precision can be reached in the wavelength range 700–900 nm. Observations at longer wavelengths are equally precise only at the very latest spectral types (M8 and M9). We demonstrate that in this spectroscopic range, the large amount of absorption features compensates for the intrinsic faintness of an M7 star. To reach an RV precision of 1 m s−1in very low mass M dwarfs at longer wavelengths likely requires the use of a 10 m class telescope. For spectral types M6 and earlier, the combination of a red visual and a near-infrared spectrograph is ideal to search for low-mass planets and to distinguish between planets and stellar variability. At a 4 m class telescope, an instrument like CARMENES has the potential to push the RV precision well below the typical jitter level of 3–4 m s−1.
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DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
E. L. Martín;E. L. Martín;E. Guenther;M. R. Z. Osorio;H. Bouy;R. Wainscoat
通讯作者:
R. Wainscoat
影响因子:
4.8
作者:
Anglada-Escudé;Arriagada
通讯作者:
Arriagada
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
Kawashima Tomohisa;Ishiguro Seiji;Moritaka Toseo;Horiuchi Ritoku;Tomisaka Kohji;小山佑世
通讯作者:
小山佑世
影响因子:
6.5
作者:
A. Reiners;D. Homeier;P. Hauschildt;F. Allard
通讯作者:
F. Allard
DOI:
10.1051/0004-6361/201525803
发表时间:
2015-02
期刊:
arXiv: Solar and Stellar Astrophysics
影响因子:
--
作者:
F. J. Alonso-Floriano;J. Morales;J. Morales;J. Caballero;D. Montes;A. Klutsch;A. Klutsch;R. Mundt;M. Cortés-Contreras;I. Ribas;A. Reiners;P. Amado;A. Quirrenbach;S. Jeffers
通讯作者:
F. J. Alonso-Floriano;J. Morales;J. Morales;J. Caballero;D. Montes;A. Klutsch;A. Klutsch;R. Mundt;M. Cortés-Contreras;I. Ribas;A. Reiners;P. Amado;A. Quirrenbach;S. Jeffers