Publications (13)
Constraining the presence of giant planets in two-belt debris disk systems with VLT/SPHERE direct imaging and dynamical arguments
Elisabeth Matthews, Sasha Hinkley, Arthur Vigan +10
Giant, wide-separation planets often lie in the gap between multiple, distinct rings of circumstellar debris: this is the case for the HR\,8799 and HD\,95086 systems, and even the…
Discovery of a low-mass companion around HR3549
Dimitri Mawet, Trevor David, Michael Bottom +7
We report the discovery of a low-mass companion to HR3549, an A0V star surrounded by a debris disk with a warm excess detected by WISE at 22 m ( significance). We imaged…
More Rapidly Rotating PMS M Dwarfs with Light Curves Suggestive of Orbiting Clouds of Material
John Stauffer, Luisa Rebull, Trevor David +8
In a previous paper, using data from K2 Campaign 2, we identified 11 very low mass members of the Oph and Upper Scorpius star-forming region as having periodic photometric var…
The Rotational Evolution of Young, Binary M Dwarfs
John Stauffer, Luisa Rebull, Ann Marie Cody +5
We have analysed K2 light curves for more than 3,000 low mass stars in the 8 Myr old Upper Sco association, the 125 Myr age Pleiades open cluster and the 700 Myr…
Pleiades or Not? Resolving the Status of the Lithium Rich M Dwarfs HHJ339 and HHJ430
John Stauffer, Davide Barrado, Trevor David +7
Oppenheimer et al. (1997) discovered two M5 dwarfs in the Pleiades with nearly primordial lithium. These stars are not low enough in mass to represent the leading edge of the lithi…
An Asymmetric Eclipse Seen Towards the Pre-Main Sequence Binary System V928 Tau
Dirk van Dam, Matthew Kenworthy, Trevor David +21
K2 observations of the weak-lined T Tauri binary V928 Tau A+B show the detection of a single, asymmetric eclipse which may be due to a previously unknown substellar companion eclip…
Orbiting Clouds of Material at the Keplerian Co-Rotation Radius of Rapidly Rotating Low Mass WTTs in Upper Sco
John Stauffer, Andrew Collier Cameron, Moira Jardine +8
Using K2 data, we have identified 23 very low mass members of the Oph and Upper Scorpius star-forming region as having periodic photometric variability not easily explained by…
paired: A Statistical Framework for Detecting Stellar Binarity with Gaia RVs. I. Sensitivity to Unresolved Binaries
Quadry Chance, Daniel Foreman-Mackey, Sarah Ballard +3
Data Release 3 (DR3) from the Gaia Mission includes radial velocity measurements of over 33 million targets. Among many scientific applications, the overlap of this stellar sample…
A Low-Mass Exoplanet Candidate Detected By Transiting the Praesepe M Dwarf JS 183
Joshua Pepper, Ed Gillen, Hannu Parviainen +11
We report the discovery of a repeating photometric signal from a low-mass member of the Praesepe open cluster that we interpret as a Neptune-sized transiting planet. The star is JS…
Methods for the detection of stellar rotation periods in individual TESS sectors and results from the Prime mission
Isabel L. Colman, Ruth Angus, Trevor David +3
For ongoing studies of the role of rotation in stellar evolution, we require large catalogs of rotation periods for testing and refining gyrochronology. While there is a wealth of…
The Kappa Andromedae System: New Constraints on the Companion Mass, System Age & Further Multiplicity
Sasha Hinkley, Laurent Pueyo, Jacqueline K. Faherty +29
Kappa Andromedae is a B9IVn star at 52 pc for which a faint substellar companion separated by 55 AU was recently announced. In this work, we present the first spectrum of the compa…
A metal-poor atmosphere with a hot interior for a young sub-Neptune progenitor: JWST/NIRSpec transmission spectrum of V1298 Tau b
Saugata Barat, Jean-Michel Désert, Sagnick Mukherjee +19
We present the JWST/NIRSpec G395H transmission spectrum of the young (10 - 20 Myr old) transiting planet V1298 Tau b (9.85+/-0.35 Re, Teq=670K). Combined HST and JWST observations…
A TESS Dress Rehearsal: Planetary Candidates and Variables from K2 Campaign 17
Ian J. M. Crossfield, Natalia Guerrero, Trevor David +38
We produce light curves for all ~34,000 targets observed with K2 in Campaign 17 (C17), identifying 34 planet candidates, 184 eclipsing binaries, and 222 other periodic variables. T…