activity
20192026
most citedThe California-Kepler Survey. X. The Radius Gap as a Function of Stellar Mass, Metallicity, and Age

133 citations · 1.1k across the 48 of their papers we have counts for

collaborators
Showing 2021Show all

12 papers · 1 filter

astro-ph.EP2021★ 1 cited

TOI 560 : Two Transiting Planets Orbiting a K Dwarf Validated with iSHELL, PFS and HIRES RVs

Mohammed El Mufti, Peter P. Plavchan, Howard Isaacson +92

We validate the presence of a two-planet system orbiting the 0.15--1.4 Gyr K4 dwarf TOI 560 (HD 73583). The system consists of an inner moderately eccentric transiting mini-Neptune…

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★ 16 cited

The TESS-Keck Survey. VI. Two Eccentric sub-Neptunes Orbiting HIP-97166

Mason G. MacDougall, Erik A. Petigura, Isabel Angelo +45

We report the discovery of HIP-97166b (TOI-1255b), a transiting sub-Neptune on a 10.3-day orbit around a K0 dwarf 68 pc from Earth. This planet was identified in a systematic searc…

astro-ph.EP2021★ 13 cited

Another super-dense sub-Neptune in K2-182 b and refined mass measurements for K2-199 b and c

Joseph M. Akana Murphy, Molly R. Kosiarek, Natalie M. Batalha +10

We combine multiple campaigns of K2 photometry with precision radial velocity measurements from Keck-HIRES to measure the masses of three sub-Neptune-size planets. We confirm the p…

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★ 34 cited

Stellar Obliquities in Long-period Exoplanet Systems (SOLES) I: The Spin-Orbit Alignment of K2-140 b

Malena Rice, Songhu Wang, Andrew W. Howard +8

Obliquity measurements for stars hosting relatively long-period giant planets with weak star-planet tidal interactions may play a key role in distinguishing between formation theor…

astro-ph.EP2021★ 14 cited

Wolf 503 b: Characterization of a Sub-Neptune Orbiting a Metal-Poor K Dwarf

Alex S. Polanski, Ian J. M. Crossfield, Jennifer A. Burt +35

Using radial velocity measurements from four instruments, we report the mass and density of a sub-Neptune orbiting the quiet K-dwarf Wolf 503 (HIP…

astro-ph.EP2021★ 1 cited

The California Legacy Survey I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades

Lee J. Rosenthal, Benjamin J. Fulton, Lea A. Hirsch +20

We present a high-precision radial velocity (RV) survey of 719 FGKM stars, which host 164 known exoplanets and 14 newly discovered or revised exoplanets and substellar companions.…

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★ 39 cited

The TESS-Keck Survey: Science Goals and Target Selection

Ashley Chontos, Joseph M. Akana Murphy, Mason G. MacDougall +28

Space-based transit missions such as Kepler and TESS have demonstrated that planets are ubiquitous. However, the success of these missions heavily depends on ground-based radial ve…

astro-ph.EP2021★ 9 cited

The California Legacy Survey II. Occurrence of Giant Planets Beyond the Ice line

Benjamin J. Fulton, Lee J. Rosenthal, Lea A. Hirsch +20

We used high-precision radial velocity measurements of FGKM stars to determine the occurrence of giant planets as a function of orbital separation spanning 0.03-30 au. Giant planet…

astro-ph.EP2021★ 43 cited

TKS X: Confirmation of TOI-1444b and a Comparative Analysis of the Ultra-short-period Planets with Hot Neptunes

Fei Dai, Andrew W. Howard, Natalie M. Batalha +48

We report the discovery of TOI-1444b, a 1.4- super-Earth on a 0.47-day orbit around a Sun-like star discovered by {\it TESS}. Precise radial velocities from Keck/HIRES co…