Search Publications
Detection of Na, K, and H2O in the hazy atmosphere of WASP-6b
Nikolov, Nikolay; Smalley, Barry; Carter, Aarynn L. +13 more
We present new observations of the transmission spectrum of the hot Jupiter WASP-6b both from the ground with the Very Large Telescope FOcal Reducer and Spectrograph (FORS2) from 0.45 to 0.83 µm, and space with the Transiting Exoplanet Survey Satellite from 0.6 to 1.0 µm and the Hubble Space Telescope (HST) Wide Field Camera 3 from 1.1…
On reverberation mapping lag uncertainties
Brandt, W. N.; Kochanek, C. S.; Peterson, B. M. +5 more
We broadly explore the effects of systematic errors on reverberation mapping lag uncertainty estimates from JAVELIN and the interpolated cross-correlation function (ICCF) method. We focus on simulated light curves from random realizations of the light curves of five intensively monitored AGNs. Both methods generally work well even in the presence …
A Gaia Early DR3 Mock Stellar Catalog: Galactic Prior and Selection Function
Girardi, Léo; Fouesneau, Morgan; Sharma, Sanjib +7 more
We present a mock stellar catalog, matching in volume, depth and data model the content of the planned Gaia early data release 3 (Gaia EDR3). We have generated our catalog (GeDR3mock) using galaxia, a tool to sample stars from an underlying Milky Way (MW) model or from N-body data. We used an updated Besançon Galactic model together with the lates…
EvryFlare. II. Rotation Periods of the Cool Flare Stars in TESS across Half the Southern Sky
Law, Nicholas M.; Corbett, Hank; Fors, Octavi +6 more
We measure rotation periods and sinusoidal amplitudes in Evryscope light curves for 122 two-minute K5-M4 TESS targets selected for strong flaring. The Evryscope array of telescopes has observed all bright nearby stars in the south, producing 2-minute cadence light curves since 2016. Long-term, high-cadence observations of rotating flare stars prob…
MuSCAT2 multicolour validation of TESS candidates: an ultra-short-period substellar object around an M dwarf
Tamura, M.; Béjar, V. J. S.; Korth, J. +37 more
Context. We report the discovery of TOI 263.01 (TIC 120916706), a transiting substellar object (R = 0.87 RJup) orbiting a faint M3.5 V dwarf (V = 18.97) on a 0.56 d orbit.
Aims: We setout to determine the nature of the Transiting Exoplanet Survey Satellite (TESS) planet candidate TOI 263.01 using ground-based multicolour transit ph…
O2- and CO-rich Atmospheres for Potentially Habitable Environments on TRAPPIST-1 Planets
Hu, Renyu; Wolf, Eric T.; Peterson, Luke
Small exoplanets of nearby M-dwarf stars present the possibility of finding and characterizing habitable worlds within the next decade. TRAPPIST-1, an ultracool M-dwarf star, was recently found to have seven Earth-sized planets of predominantly rocky composition. The planets e, f, and g could have a liquid water ocean on their surface given approp…
ALMA Evidence for Ram Pressure Compression and Stripping of Molecular Gas in the Virgo Cluster Galaxy NGC 4402
Rubio, M.; Pompei, E.; Vlahakis, C. +5 more
High-resolution (1″ × 2″) Atacama Large Millimeter Array CO(2-1) observations of the ram pressure stripped galaxy NGC 4402 in the Virgo cluster show some of the clearest evidence yet for the impacts of ram pressure on the molecular interstellar medium (ISM) of a galaxy. The eastern side of the galaxy at r ∼ 4.5 kpc, upon which ram pressure is inci…
Orbital Stability of Circumstellar Planets in Binary Systems
Li, Gongjie; Kostov, Veselin; Haghighipour, Nader +1 more
Planets that orbit only one of the stars in stellar binary systems (i.e., circumstellar) are dynamically constrained to a limited range of orbital parameters, and understanding conditions on their stability is thus of great importance in exoplanet searches. We perform ∼700 million N-body simulations to identify how stability regions depend on prop…
FRagmentation and Evolution of Dense Cores Judged by ALMA (FREJA). I. Overview: Inner ∼1000 au Structures of Prestellar/Protostellar Cores in Taurus
Inutsuka, Shu-ichiro; André, Philippe; Tokuda, Kazuki +11 more
We have performed survey-type observations in 1 mm continuum and molecular lines toward dense cores (32 prestellar + 7 protostellar) with an average density of ≳105 cm-3 in the Taurus molecular clouds using the Atacama Large Millimeter/submillimeter Array-Atacama Compact Array (ALMA-ACA) stand-alone mode with an angular resol…
Kepler-1661 b: A Neptune-sized Kepler Transiting Circumbinary Planet around a Grazing Eclipsing Binary
Torres, Guillermo; Cochran, William D.; Endl, Michael +7 more
We report the discovery of a Neptune-sized ( ${R}_{p}=3.87\pm 0.06{R}_{\oplus }$ ) transiting circumbinary planet, Kepler-1661 b, found in the Kepler photometry. The planet has a period of ∼175 days and its orbit precesses with a period of only 35 yr. The precession causes the alignment of the orbital planes to vary, and the planet is in a transit…