HATS-37Ab and HATS-38b: Two Transiting Hot Neptunes in the Desert*
Jordan
A
author
Bakos
G
A
author
Bayliss
D
author
Bento
J
author
Bhatti
W
author
Brahm
R
author
Csubry
Z
author
Espinoza
N
author
Hartman
J
D
author
Henning
T
author
Mancini
L
author
Penev
K
author
Rabus
M
author
Sarkis
P
author
Suc
V
author
de Val-Borro
M
author
Zhou
G
author
Butler
R
P
author
Teske
J
author
Crane
J
author
Shectman
S
author
Tan
T
G
author
Thompson
I
author
Wallace
J
J
author
Lazar
J
author
Papp
I
author
Sari
P
author
2020
English
We report the discovery of two transiting Neptunes by the HATSouth survey. The planet HATS-37Ab has a mass of 0.099 +/- 0.042 MJ (31.5.+/-.13.4M(circle dot)) and a radius of 0.606 +/- 0.016 R-J, and is on a P = 4.3315 day orbit around a V = 12.266 +/- 0.030 mag, 0.843(-0.012)(+0.017)M(circle dot) star with a radius of 0.877(-0.012)(+0.019) R-circle dot We also present evidence that the star HATS-37A has an unresolved stellar companion HATS-37B, with a photometrically estimated mass of 0.654 +/- 0.033.M-circle dot The planet HATS-38b has a mass of 0.074. 0.011MJ (23.5 +/- 3.5M(circle dot)) and a radius of 0.614 +/- 0.017 R-J, and is on a P = 4.3750 day orbit around a V = 12.411 +/- 0.030 mag, 0.890(-0.012)(+0.016) M-circle dot star with a radius of 1.105 +/- 0.016.R-circle dot Both systems appear to be old, with isochrone-based ages of 11.46(-1.45)(+0.79) Gyr, and 11.89 +/- 0.60 Gyr, respectively. Both HATS-37Ab and HATS-38b lie in the Neptune desert and are thus examples of a population with a low occurrence rate. They are also among the lowest-mass planets found from ground-based wide-field surveys to date.
Exoplanets
Hot Neptunes
WOS:000584931800001
exported from refbase (show.php?record=1261), last updated on Thu, 19 Nov 2020 14:40:37 -0300
text
10.3847/1538-3881/aba530
Jordan_etal2020
Astronomical Journal
Astron. J.
2020
Iop Publishing Ltd
continuing
periodical
academic journal
160
5
14 pp
0004-6256