350 citations · 5.1k across the 160 of their papers we have counts for
21 papers · 1 filter
Surveying for Close Binaries among Lithium-rich Giants
Jesús Torres, Sebastián Vilaza-Dallago, Julio Chanamé +1
One of the possible scenarios usually considered to explain the existence of low-mass red giants with anomalously high lithium (Li) abundances requires the interaction with a close…
NGTS-EB-7, an eccentric, long-period, low-mass eclipsing binary
Toby Rodel, Christopher. A. Watson, Solène Ulmer-Moll +35
Despite being the most common types of stars in the Galaxy, the physical properties of late M dwarfs are often poorly constrained. A trend of radius inflation compared to evolution…
Spectroscopic observations of flares and superflares on AU Mic
P. Odert, M. Leitzinger, R. Greimel +13
The young active flare star AU~Mic is the planet host star with the highest flare rate from TESS data. Therefore, it represents an ideal target for dedicated ground-based monitorin…
The EBLM Project XII. An eccentric, long-period eclipsing binary with a companion near the hydrogen-burning limit
Yasmin T. Davis, Amaury H. M. J. Triaud, Alix V. Freckelton +17
In the hunt for Earth-like exoplanets it is crucial to have reliable host star parameters, as they have a direct impact on the accuracy and precision of the inferred parameters for…
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XII. A sample of systems with photometry
K. G. Hełminiak, A. Moharana, T. Pawar +10
We present results of the analysis of light and radial velocity (RV) curves of eight detached eclipsing binaries observed by the All-Sky Automated Survey, which we have followed up…
Populating the brown dwarf and stellar boundary: Five stars with transiting companions near the hydrogen-burning mass limit
Nolan Grieves, François Bouchy, Monika Lendl +52
We report the discovery of five transiting companions near the hydrogen-burning mass limit in close orbits around main sequence stars originally identified by the Transiting Exopla…
TOI 694 b and TIC 220568520 b: Two Low-Mass Companions Near the Hydrogen Burning Mass Limit Orbiting Sun-like Stars
Ismael Mireles, Avi Shporer, Nolan Grieves +40
We report the discovery of TOI 694 b and TIC 220568520 b, two low-mass stellar companions in eccentric orbits around metal-rich Sun-like stars, first detected by the Transiting Exo…
The White Dwarf Binary Pathways Survey III: contamination from hierarchical triples containing a white dwarf
F. Lagos, M. R. Schreiber, S. G. Parsons +12
The White Dwarf Binary Pathways Survey aims at increasing the number of known detached A, F, G and K main sequence stars in close orbits with white dwarf companions (WD+AFGK binari…
Two intermediate-mass transiting brown dwarfs from the TESS mission
Theron W. Carmichael, Samuel N. Quinn, Alexander J. Mustill +28
We report the discovery of two intermediate-mass brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA's Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital peri…
TESS light curves of low-mass detached eclipsing binaries
Krzysztof G. Hełminiak, Andrés Jordán, Nestor Espinoza +1
We present high-precision light curves of several M- and K-type, active detached eclipsing binaries (DEBs), recorded with 2-minute cadence by the Transiting Exoplanet Survey Satell…
TOI-503: The first known brown dwarf-Am star binary from the TESS mission
Ján Šubjak, Rishikesh Sharma, Theron W. Carmichael +76
We report the discovery of an intermediate-mass transiting brown dwarf, TOI-503b, from the TESS mission. TOI-503b is the first brown dwarf discovered by TESS and orbits a metallic-…
A discontinuity in the -radius relation of M-dwarfs
Markus Rabus, Régis Lachaume, Andrés Jordán +7
We report on 13 new high-precision measurements of stellar diameters for low-mass dwarfs obtained by means of near-infrared long-baseline interferometry with PIONIER at the Very La…
Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - X. Three high-contrast systems with secondaries detected with IR spectroscopy
K. G. Hełminiak, A. Tokovinin, E. Niemczura +13
We present results of the combined photometric and spectroscopic analysis of three detached eclipsing binaries, which secondary components are not visible or very hard to identify…
The nova V1369 Cen -- a short review
L. Izzo, M. Della Valle, F. Matteucci +9
We briefly present the spectroscopic evolution of the recent outburst of the classical nova V1369 Cen, and the presence of a narrow absorption line identified as due to the resonan…
Early optical spectra of nova V1369 Cen show presence of Lithium
L. Izzo, M. Della Valle, E. Mason +10
We present early high resolution spectroscopic observations of the nova V1369 Cen. We have detected an absorption feature at 6695.6 Å\, that we have identified as blue--shifted $^7…
A 0.24+0.18 Msun double-lined eclipsing binary from the HATSouth survey
G. Zhou, D. Bayliss, J. D. Hartman +21
We report the discovery and characterisation of a new M-dwarf binary, with component masses and radii of M1 = 0.244 -0.003/+0.003 Msun, R1 = 0.261 -0.009/+0.006 Rsun, M2 = 0.179 -0…
The first pre-supersoft X-ray binary
S. G. Parsons, M. R. Schreiber, B. T. Gansicke +8
We report the discovery of an extremely close white dwarf plus F dwarf main-sequence star in a 12 hour binary identified by combining data from the RAdial Velocity Experiment (RAVE…
Multiples among detached eclipsing binaries from the ASAS catalog
K. G. Hełminiak, M. Konacki, M. Ratajczak +5
For more than three years now we have been conducting a spectroscopic survey of detached eclipsing binaries (DEBs) from the All-Sky Automated Survey (ASAS) database. Thousands of h…
Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - VII. V1200 Centauri: a bright triple in the Hyades moving group
J. Coronado, K. G. Hełminiak, L. Vanzi +6
We present the orbital and physical parameters of the detached eclipsing binary V1200~Centauri (ASAS~J135218-3837.3) from the analysis of spectroscopic observations and light curve…
Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - VI. AK Fornacis - a rare, bright K-type eclipsing binary
K. G. Hełminiak, R. Brahm, M. Ratajczak +4
We present the results of the combined photometric and spectroscopic analysis of a bright (V=9.14), nearby (d=31 pc), late-type detached eclipsing binary AK Fornacis. This P=3.981…
The Mass-Radius Relationship for Very Low Mass Stars: Four New Discoveries from the HATSouth Survey
G. Zhou, D. Bayliss, J. D. Hartman +15
We report the discovery of four transiting F-M binary systems with companions between 0.1-0.2 Msun in mass by the HATSouth survey. These systems have been characterised via a globa…