output
19962026
most citedThe Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III

2.5k citations

Showing 2021 · astro-ph.EPShow all

79 papers · 2 filters

astro-ph.EP2021★ 5 cited

Synchronous Satellites of Venus

Anthony R. Dobrovolskis, Jose Luis Alvarellos

Synchronous satellites of Venus have long been thought unstable, but we use Poincare's surface of section technique to show that synchronous quasi-satellites orbiting just outside…

astro-ph.EP2021★ 15 cited

Hypotheses for Triton's Plumes: New Analyses and Future Remote Sensing Tests

Jason D. Hofgartner, Samuel P. D. Birch, Julie Castillo +14

At least two active plumes were observed on Neptune's moon Triton during the Voyager 2 flyby in 1989. Models for Triton's plumes have previously been grouped into five hypotheses,…

astro-ph.EP2021★ 71 cited

ExoMiner: A Highly Accurate and Explainable Deep Learning Classifier that Validates 301 New Exoplanets

Hamed Valizadegan, Miguel Martinho, Laurent S. Wilkens +10

The kepler and TESS missions have generated over 100,000 potential transit signals that must be processed in order to create a catalog of planet candidates. During the last few yea…

astro-ph.EP2021★ 74 cited

GJ 367b: A dense ultra-short period sub-Earth planet transiting a nearby red dwarf star

Kristine W. F. Lam, Szilárd Csizmadia, Nicola Astudillo-Defru +75

Ultra-short-period (USP) exoplanets have orbital periods shorter than one day. Precise masses and radii of USPs could provide constraints on their unknown formation and evolution p…

astro-ph.EP2021★ 18 cited

TOI-1842b: A Transiting Warm Saturn Undergoing Re-Inflation around an Evolving Subgiant

Robert A. Wittenmyer, Jake T. Clark, Trifon Trifonov +41

The imminent launch of space telescopes designed to probe the atmospheres of exoplanets has prompted new efforts to prioritise the thousands of transiting planet candidates for fol…

astro-ph.EP2021★ 42 cited

Accreting protoplanets: Spectral signatures and magnitude of gas and dust extinction at H alpha

G. -D. Marleau, Y. Aoyama, R. Kuiper +14

Accreting planets have been seen at Ha (H alpha), but targeted searches have not been fruitful. For planets, accretion tracers should come from the shock itself, exposing them to e…

astro-ph.EP2021★ 49 cited

TOI-2109b: An Ultrahot Gas Giant on a 16 hr Orbit

Ian Wong, Avi Shporer, George Zhou +56

We report the discovery of an ultrahot Jupiter with an extremely short orbital period of days (16 hr). The plane…

astro-ph.EP2021★ 46 cited

TOI-2076 and TOI-1807: Two young, comoving planetary systems within 50 pc identified by TESS that are ideal candidates for further follow-up

Christina Hedges, Alex Hughes, Steven Giacalone +42

We report the discovery of two planetary systems around comoving stars; TOI-2076 (TIC 27491137) and TOI-1807 (TIC 180695581). TOI-2076 is a nearby (41.9 pc) multi-planetary system…

astro-ph.EP2021★ 14 cited

Volatile transport modeling on Triton with new observational constraints

T. Bertrand, E. Lellouch, B. J. Holler +18

Neptune's moon Triton shares many similarities with Pluto, including volatile cycles of N2, CH4 and CO, and represents a benchmark case for the study of surface-atmosphere interact…

astro-ph.EP2021★ 37 cited

Jupiter's Temperate Belt/Zone Contrasts Revealed at Depth by Juno Microwave Observations

L. N. Fletcher, F. A. Oyafuso, M. Allison +12

Juno Microwave Radiometer (MWR) observations of Jupiter's mid-latitudes reveal a strong correlation between brightness temperature contrasts and zonal winds, confirming that the ba…

astro-ph.EP2021

Observed tidal evolution of Kleopatra's outer satellite

M. Brož, J. Ďurech, B. Carry +8

The orbit of the outer satellite Alexhelios of (216) Kleopatra is already constrained by adaptive-optics astrometry, obtained with the VLT/SPHERE instrument. However, there is also…

astro-ph.EP2021★ 69 cited

The Sonora Substellar Atmosphere Models. II. Cholla: A Grid of Cloud-free, Solar Metallicity Models in Chemical Disequilibrium for the JWST Era

Theodora Karalidi, Mark Marley, Jonathan J. Fortney +5

Exoplanet and brown dwarf atmospheres commonly show signs of disequilibrium chemistry. In the James Webb Space Telescope era high resolution spectra of directly imaged exoplanets w…

astro-ph.EP2021★ 17 cited

HD207897 b: A dense sub-Neptune transiting a nearby and bright K-type star

N. Heidari, I. Boisse, J. Orell-Mique +90

We present the discovery and characterization of a transiting sub-Neptune orbiting with a 16.20 day period around a nearby (28 pc) and bright(V=8.37) K0V star HD207897 (TOI-1611).…

astro-ph.EP2021★ 14 cited

Mysterious Dust-emitting Object Orbiting TIC 400799224

Brian P. Powell, Veselin Kostov, Saul Rappaport +24

We report the discovery of a unique object of uncertain nature -- but quite possibly a disintegrating asteroid or minor planet -- orbiting one star of the widely separated binary T…

astro-ph.EP2021★ 50 cited

The young HD 73583 (TOI-560) planetary system: Two 10-M mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf

O. Barragán, D. J. Armstrong, D. Gandolfi +103

We present the discovery and characterisation of two transiting planets observed by \textit{TESS} in the light curves of the young and bright (V=9.67) star HD73583 (TOI-560). We pe…

astro-ph.EP2021★ 17 cited

The LHS 1678 System: Two Earth-Sized Transiting Planets and an Astrometric Companion Orbiting an M Dwarf Near the Convective Boundary at 20 pc

Michele L. Silverstein, Joshua E. Schlieder, Thomas Barclay +48

We present the TESS discovery of the LHS 1678 (TOI-696) exoplanet system, comprised of two approximately Earth-sized transiting planets and a likely astrometric brown dwarf orbitin…

astro-ph.EP2021★ 83 cited

TESS Hunt for Young and Maturing Exoplanets (THYME) VI: an 11 Myr giant planet transiting a very low-mass star in Lower Centaurus Crux

Andrew W. Mann, Mackenna L. Wood, Stephen P. Schmidt +48

Mature super-Earths and sub-Neptunes are predicted to be Jovian radius when younger than 10 Myr. Thus, we expect to find 5-15 planets around young stars even if t…

astro-ph.EP2021★ 40 cited

The Aligned Orbit of WASP-148b, the Only Known Hot Jupiter with a Nearby Warm Jupiter Companion, from NEID and HIRES

Xian-Yu Wang, Malena Rice, Songhu Wang +39

We present spectroscopic measurements of the Rossiter-McLaughlin effect for WASP-148b, the only known hot Jupiter with a nearby warm-Jupiter companion, from the WIYN/NEID and Keck/…

astro-ph.EP2021★ 17 cited

TKS V. Twin sub-Neptunes Transiting the Nearby G Star HD 63935

Nicholas Scarsdale, Joseph M. Akana Murphy, Natalie M. Batalha +56

We present the discovery of two nearly identically-sized sub-Neptune transiting planets orbiting HD 63935, a bright ( mag), sun-like () star at 49 pc. TESS id…

astro-ph.EP2021★ 55 cited

Stellar surface inhomogeneities as a potential source of the atmospheric signal detected in the K2-18 b transmission spectrum

Thomas Barclay, Veselin B. Kostov, Knicole D. Colón +5

Transmission spectroscopy of transiting exoplanets is a proven technique that can yield information on the composition and structure of a planet's atmosphere. However, transmission…

astro-ph.EP2021★ 74 cited

Diving Beneath the Sea of Stellar Activity: Chromatic Radial Velocities of the Young AU Mic Planetary System

Bryson Cale, Michael Reefe, Peter Plavchan +52

We present updated radial-velocity (RV) analyses of the AU Mic system. AU Mic is a young (22 Myr) early M dwarf known to host two transiting planets - days, $R_{b}=…

astro-ph.EP2021★ 11 cited

TOI-1296b and TOI-1298b observed with TESS and SOPHIE: Two hot Saturn-mass exoplanets with different densities around metal-rich stars

C. Moutou, J. M. Almenara, G. Hébrard +40

We present the discovery of two new transiting extrasolar planet candidates identified as TOI-1296.01 and TOI-1298.01 by the Transiting Exoplanet Survey Satellite (TESS). The plane…

astro-ph.EP2021

A Uniform Search for Nearby Planetary Companions to Hot Jupiters in TESS Data Reveals Hot Jupiters are Still Lonely

Benjamin J. Hord, Knicole D. Colón, Veselin Kostov +12

We present the results of a uniform search for additional planets around all stars with confirmed hot Jupiters observed by the Transiting Exoplanet Survey Satellite (TESS) in its C…

astro-ph.EP2021★ 3 cited

Molecules with ALMA at Planet-forming Scales (MAPS) XIX. Spiral Arms, a Tail, and Diffuse Structures Traced by CO around the GM Aur Disk

Jane Huang, Edwin A. Bergin, Karin I. Öberg +28

The concentric gaps and rings commonly observed in protoplanetary disks in millimeter continuum emission have lent the impression that planet formation generally proceeds within or…