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A Catalog of Homogeneously Derived Stellar Parameters for Spectroscopic Survey Stars
Stefan Y. Stefanov, Evelina Zaharieva, Djemma Ruseva +9
Uniformly derived stellar parameters are vital for exoplanet demographic studies because they directly influence the inferred planetary masses, radii, and bulk densities. This stud…
A Deep Precursor-Dip-Main Superoutburst Sequence in VW Hydri Observed with TESS: High-Cadence Constraints on the Thermal-Tidal Instability Model
Bisi Bernard Ogunwale, Shara Michael, Avi Shporer +2
We present 120s cadence TESS observations of three superoutbursts of the SU UMa-type dwarf nova VW Hydri. Two events (SO2 in Sectors 87+88 and SO3 in Sector 93) exhibit a pronounce…
Analysis of the public HARPS/ESO spectroscopic archive -- Ca II H&K time series for the HARPS radial velocity database
V. Perdelwitz, T. Trifonov, J. T. Teklu +2
Magnetic activity is currently the primary limiting factor in radial velocity (RV) exoplanet searches. Even inactive stars, such as the Sun, exhibit RV jitter of the order of a few…
The CARMENES search for exoplanets around M dwarfs. Telluric absorption corrected high S/N optical and near-infrared template spectra of 382 M dwarf stars
E. Nagel, S. Czesla, A. Kaminski +22
Light from celestial objects interacts with the molecules of the Earth's atmosphere, resulting in the production of telluric absorption lines in ground-based spectral data. Correct…
The CARMENES search for exoplanets around M dwarfs. Rotational variation in activity indicators of Ross 318, YZ CMi, TYC 3529-1437-1, and EV Lac
P. Schöfer, S. V. Jeffers, A. Reiners +22
The CARMENES instrument is searching for periodic radial-velocity (RV) variations of M dwarfs, which are induced by orbiting planets. However, there are other potential sources of…
CARMENES input catalog of M dwarfs VI. A time-resolved Ca II H&K catalog from archival data
V. Perdelwitz, M. Mittag, L. Tal-Or +15
Radial-velocity (RV) jitter caused by stellar magnetic activity is an important factor in state-of-the-art exoplanet discovery surveys such as CARMENES. Stellar rotation, along wit…
The CARMENES search for exoplanets around M dwarfs: Spectroscopic orbits of nine M-dwarf multiple systems, including two triples, two brown dwarf candidates, and one close M-dwarf-white dwarf binary
D. Baroch, J. C. Morales, I. Ribas +33
M dwarfs are ideal targets for the search of Earth-size planets in the habitable zone using the radial velocity method, attracting the attention of many ongoing surveys. As a by-pr…
Simultaneous photometric and CARMENES spectroscopic monitoring of fast-rotating M dwarf GJ 3270. Discovery of a post-flare corotating feature
E. N. Johnson, S. Czesla, B. Fuhrmeister +33
Context: Active M dwarfs frequently exhibit large flares, which can pose an existential threat to the habitability of any planet in orbit in addition to making said planets more di…
Magnetic fields in M dwarfs from the CARMENES survey
D. Shulyak, A. Reiners, E. Nagel +20
M dwarfs are known to generate the strongest magnetic fields among main-sequence stars with convective envelopes, but the link between the magnetic fields and underlying dynamo mec…
The CARMENES search for exoplanets around M dwarfs. Activity indicators at visible and near-infrared wavelengths
P. Schöfer, S. V. Jeffers, A. Reiners +21
The CARMENES survey is searching for Earth-like planets orbiting M dwarfs using the radial velocity method. Studying the stellar activity of the target stars is important to avoid…
The CARMENES search for exoplanets around M dwarfs: Nine new double-line spectroscopic binary stars
D. Baroch, J. C. Morales, I. Ribas +27
Context. The CARMENES spectrograph is surveying ~300 M dwarf stars in search for exoplanets. Among the target stars, spectroscopic binary systems have been discovered, which can be…
The CARMENES search for exoplanets around M dwarfs: Radial-velocity variations of active stars in visual-channel spectra
L. Tal-Or, M. Zechmeister, A. Reiners +22
Previous simulations predicted the activity-induced radial-velocity (RV) variations of M dwarfs to range from cm/s to km/s, depending on various stellar and activit…
The programme "accurate masses for SB2 components"
Jean-Louis Halbwachs, Frédéric Arenou, Henri M. J. Boffin +11
Accurate stellar masses are requested in order to improve our understanding of stellar interiors, but they are still rather rare. Fortunately, the forthcoming Gaia Mission will pro…
Masses of the components of SB2 binaries observed with Gaia. III. Accurate SB2 orbits for 10 binaries and masses of HIP 87895
Flavien Kiefer, Jean-Louis Halbwachs, Frédéric Arenou +9
In anticipation of the Gaia astrometric mission, a large sample of spectroscopic binaries has been observed since 2010 with the SOPHIE spectrograph at the Haute--Provence Observato…
Masses of the components of SB2 binaries observed with Gaia. II. Masses derived from PIONIER interferometric observations for Gaia validation
J. -L. Halbwachs, H. M. J. Boffin, J. -B. Le Bouquin +15
In anticipation of the Gaia astrometric mission, a sample of spectroscopic binaries is being observed since 2010 with the Sophie spectrograph at the Haute--Provence Observatory. Ou…
Fast radio bursts: the observational case for a Galactic origin
Dan Maoz, Abraham Loeb, Yossi Shvartzvald +10
There are by now ten published detections of fast radio bursts (FRBs), single bright GHz-band millisecond pulses of unknown origin. Proposed explanations cover a broad range from e…
BEER analysis of Kepler and CoRoT light curves. III. Spectroscopic confirmation of seventy new beaming binaries discovered in CoRoT light curves
Lev Tal-Or, Simchon Faigler, Tsevi Mazeh
(abridged for arXiv) The BEER algorithm searches stellar light curves for the BEaming, Ellipsoidal, and Reflection photometric modulations that are caused by a short-period compani…
Seventy new non-eclipsing BEER binaries discovered in CoRoT lightcurves and confirmed by RVs from AAOmega
Lev Tal-Or, Simchon Faigler, Tsevi Mazeh
We applied the BEER algorithm to the CoRoT lightcurves from the first five LRc fields and identified non-eclipsing BEER candidates with periodic lightcurve modulations and am…
Masses of the components of SB2 binaries observed with Gaia. I. Selection of the sample and mass ratios of 20 new SB2s discovered with Sophie
Jean-Louis Halbwachs, Frédéric Arenou, Dimitri Pourbaix +7
In anticipation of the Gaia astrometric mission, a large sample of spectroscopic binaries is being observed since 2010 with the Sophie spectrograph at the Haute--Provence Observato…
SDSS 1355+0856: A detached white dwarf + M star binary in the period gap discovered by the SWARMS survey
Carles Badenes, Marten H. van Kerkwijk, Mukremin Kilic +5
SDSS 1355+0856 was identified as a hot white dwarf (WD) with a binary companion from time-resolved SDSS spectroscopy as part of the ongoing SWARMS survey. Follow-up observations wi…
A new method based on Markov chains for deriving SB2 orbits directly from their spectra
J. -B. Salomon, R. Ibata, P. Guillout +7
We present a new method to derive orbital elements of double-lined spectroscopic binaries (SB2). The aim is to have accurate orbital parameters of a selection of SB2 in order to pr…