HATS-47b, HATS-48Ab, HATS-49b, and HATS-72b: Four Warm Giant Planets Transiting K Dwarfs
Name
Hartman_2020_AJ_159_173.pdf
Description
Published version
Size
4.06 MB
Format
Unknown
Checksum (MD5)
d5d23b55519a8e84c2acce04464a3add
Author(s)
Ricker, George R
Vanderspek, Roland K
Seager, Sara
Crossfield, Ian Jm
Date Issued
2020
Journal
Astronomical Journal
Publisher
American Astronomical Society
Version
Final published version
Abstract
We report the discovery of four transiting giant planets around K dwarfs. The
planets HATS-47b, HATS-48Ab, HATS-49b, and HATS-72b have masses of
$0.369_{-0.021}^{+0.031}$ $M_{J}$, $0.243_{-0.030}^{+0.022}$ $M_{J}$,
$0.353_{-0.027}^{+0.038}$ $M_{J}$ and $0.1254\pm0.0039$ $M_{J}$, respectively,
and radii of $1.117\pm0.014$ $R_{J}$, $0.800\pm0.015$ $R_{J}$, $0.765\pm0.013$
$R_{J}$, and $0.7224\pm0.0032$ $R_{J}$, respectively. The planets orbit close
to their host stars with orbital periods of $3.9228$ d, $3.1317$ d, $4.1480$ d
and $7.3279$ d, respectively. The hosts are main sequence K dwarfs with masses
of $0.674_{-0.012}^{+0.016}$ $M_{\odot}$, $0.7279\pm0.0066$ $M_{\odot}$,
$0.7133\pm0.0075$ $M_{\odot}$, and $0.7311\pm0.0028$ $M_{\odot}$ and with
$V$-band magnitudes of $V = 14.829\pm0.010$, $14.35\pm0.11$, $14.998\pm0.040$
and $12.469\pm0.010$. The Super-Neptune HATS-72b (a.k.a.\ WASP-191b and TOI
294.01) was independently identified as a transiting planet candidate by the
HATSouth, WASP and TESS surveys, and we present a combined analysis of all of
the data gathered by each of these projects (and their follow-up programs). An
exceptionally precise mass is measured for HATS-72b thanks to high-precision
radial velocity (RV) measurements obtained with VLT/ESPRESSO, FEROS, HARPS and
Magellan/PFS. We also incorporate TESS observations of the warm Saturn-hosting
systems HATS-47 (a.k.a. TOI 1073.01), HATS-48A and HATS-49. HATS-47 was
independently identified as a candidate by the TESS team, while the other two
systems were not previously identified from the TESS data. The RV orbital
variations are measured for these systems using Magellan/PFS. HATS-48A has a
resolved $5.\!\!^{\prime\prime}4$ neighbor in Gaia~DR2, which is a
common-proper-motion binary star companion to HATS-48A with a mass of $0.22$
$M_{\odot}$ and a current projected physical separation of $\sim$1,400 au.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.3847/1538-3881/ab7821
