Showing 2021 · astro-ph.EPShow all

21 papers · 2 filters

astro-ph.EP2021★ 11 cited

The Gliese 86 Binary System: A Warm Jupiter Formed in a Disk Truncated at 2 AU

Yunlin Zeng, Timothy D. Brandt, Gongjie Li +12

Gliese 86 is a nearby K dwarf hosting a giant planet on a 16-day orbit and an outer white dwarf companion on a century-long orbit. In this study we combine radial…

astro-ph.EP2021★ 6 cited

The GALAH Survey: Improving our understanding of confirmed and candidate planetary systems with large stellar surveys

Jake T. Clark, Duncan J. Wright, Robert A. Wittenmyer +24

Pioneering photometric, astrometric, and spectroscopic surveys are helping exoplanetary scientists better constrain the fundamental properties of stars within our galaxy, and the p…

astro-ph.EP2021★ 69 cited

ExoMol line lists -- XLIV. IR and UV line list for silicon monoxide (SiO)

Sergei N. Yurchenko, Jonathan Tennyson, Anna-Maree Syme +15

A new silicon monoxide (SiO) line list covering infrared, visible and ultraviolet regions called SiOUVenIR is presented. This line list extends the infrared EBJT ExoM…

astro-ph.EP2021★ 29 cited

V1298 Tau with TESS: Updated Ephemerides, Radii, and Period Constraints from a Second Transit of V1298 Tau e

Adina D. Feinstein, Trevor J. David, Benjamin T. Montet +3

V1298 Tau is a young (20-30 Myr) solar-mass K star hosting four transiting exoplanets with sizes between 0.5 - 0.9 . Given the system's youth, it provides a unique opportunity…

astro-ph.EP2021★ 30 cited

C/2014 UN271 (Bernardinelli-Bernstein): the nearly spherical cow of comets

Pedro H. Bernardinelli, Gary M. Bernstein, Benjamin T. Montet +64

C/2014 UN271 (Bernardinelli-Bernstein) is a comet incoming from the Oort cloud which is remarkable in having the brightest (and presumably largest) nucleus of any well-measured com…

astro-ph.EP2021★ 3 cited

K2, Spitzer, and TESS Transits of Four Sub-Neptune Exoplanets

Alison Duck, Caleb K. Harada, Justin Harrell +5

We present new Spitzer transit observations of four K2 transiting sub-Neptunes: K2-36c, K2-79b, K2-167b, and K2-212b. We derive updated orbital ephemerides and radii for these plan…

astro-ph.EP2021★ 45 cited

TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet

Ares Osborn, David J. Armstrong, Bryson Cale +125

We present the bright (V), multi-planet system TOI-431, characterised with photometry and radial velocities. We estimate the stellar rotation period to be $30.5 \pm…

astro-ph.EP2021★ 18 cited

The transmission spectrum of WASP-17 b from the optical to the near-infrared wavelengths: combining STIS, WFC3 and IRAC datasets

Arianna Saba, Angelos Tsiaras, Mario Morvan +6

We present the transmission spectrum of the inflated hot-Jupiter WASP-17 b, observed with the STIS and WFC3 instruments aboard the Hubble Space Telescope, allowing for a continuous…

astro-ph.EP2021★ 8 cited

HD 183579b: A Warm Sub-Neptune Transiting a Solar Twin Detected by TESS

Tianjun Gan, Megan Bedell, Sharon Xuesong Wang +48

We report the discovery and characterization of a transiting warm sub-Neptune planet around the nearby bright ( mag, mag) solar twin HD 183579, delivered by the Tr…

astro-ph.EP2021

Asteroseismology of iota Draconis and Discovery of an Additional Long-Period Companion

Michelle L. Hill, Stephen R. Kane, Tiago L. Campante +25

Giant stars as known exoplanet hosts are relatively rare due to the potential challenges in acquiring precision radial velocities and the small predicted transit depths. However, t…

astro-ph.EP2021★ 50 cited

A Second Planet Transiting LTT 1445A and a Determination of the Masses of Both Worlds

J. G. Winters, R. Cloutier, A. A. Medina +79

LTT 1445 is a hierarchical triple M-dwarf star system located at a distance of 6.86 parsecs. The primary star LTT 1445A (0.257 M_Sun) is known to host the transiting planet LTT 144…

astro-ph.EP2021★ 42 cited

H-alpha and Ca II Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c

Adina D. Feinstein, Benjamin T. Montet, Marshall C. Johnson +5

Young transiting exoplanets (< 100 Myr) provide crucial insight into atmospheric evolution via photoevaporation. However, transmission spectroscopy measurements to determine atmosp…

astro-ph.EP2021★ 19 cited

Computational Infrared Spectroscopy of 958 Phosphorus-bearing Molecules

Juan C. Zapata Trujilo, Anna-Maree Syme, Keiran N. Rowell +16

Phosphine is now well established as a biosignature, which has risen to prominence with its recent tentative detection on Venus. To follow up this discovery and related future exop…

astro-ph.EP2021★ 1 cited

TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data

Veselin B. Kostov, Brian P. Powell, Jerome A. Orosz +86

We report the first discovery of a transiting circumbinary planet detected from a single sector of TESS data. During Sector 21, the planet TIC 172900988b transited the primary star…

astro-ph.EP2021★ 78 cited

A nearby transiting rocky exoplanet that is suitable for atmospheric investigation

T. Trifonov, J. A. Caballero, J. C. Morales +66

Spectroscopy of transiting exoplanets can be used to investigate their atmospheric properties and habitability. Combining radial velocity (RV) and transit data provides additional…

astro-ph.EP2021★ 47 cited

A transiting warm giant planet around the young active star TOI-201

Melissa J. Hobson, Rafael Brahm, Andres Jordán +44

We present the confirmation of the eccentric warm giant planet TOI-201 b, first identified as a candidate in \textit{TESS} photometry (Sectors 1-8, 10-13, and 27-28) and confirmed…

astro-ph.EP2021★ 11 cited

HD 76920b pinned down: a detailed analysis of the most eccentric planetary system around an evolved star

C. Bergmann, M. I. Jones, J. Zhao +9

We present 63 new multi-site radial velocity measurements of the K1III giant HD 76920, which was recently reported to host the most eccentric planet known to orbit an evolved star.…

astro-ph.EP2021★ 41 cited

TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full Frame Images

Joseph E. Rodriguez, Samuel N. Quinn, George Zhou +115

We present the discovery and characterization of five hot and warm Jupiters -- TOI-628 b (TIC 281408474; HD 288842), TOI-640 b (TIC 147977348), TOI-1333 b (TIC 395171208, BD+47 352…

astro-ph.EP2021★ 22 cited

Dust Traps and the Formation of Cavities in Transition Discs: A millimetre to sub-millimetre comparison survey

Brodie J. Norfolk, Sarah T. Maddison, Christophe Pinte +8

The origin of the inner dust cavities observed in transition discs remains unknown. The segregation of dust and size of the cavity is expected to vary depending on which clearing m…

astro-ph.EP2021★ 16 cited

Polarization of hot Jupiter systems: a likely detection of stellar activity and a possible detection of planetary polarization

Jeremy Bailey, Kimberly Bott, Daniel V. Cotton +6

We present high-precision linear polarization observations of four bright hot Jupiter systems ( Boo, HD 179949, HD 189733 and 51 Peg) and use the data to search for polarized re…

astro-ph.EP2021★ 20 cited

TOI-1259Ab -- a gas giant planet with 2.7% deep transits and a bound white dwarf companion

David V. Martin, Kareem El-Badry, Vedad Kunovac Hodžić +33

We present TOI-1259Ab, a 1.0 Rjup gas giant planet transiting a 0.71 Rsun K-dwarf on a 3.48 day orbit. The system also contains a bound white dwarf companion TOI-1259B with a proje…