2022A&A...657A...6C


Query : 2022A&A...657A...6C

2022A&A...657A...6C - Astronomy and Astrophysics, volume 657A, 6-6 (2022/1-1)

Hα and He I absorption in HAT-P-32 b observed with CARMENES. Detection of Roche lobe overflow and mass loss.

CZESLA S., LAMPON M., SANZ-FORCADA J., GARCIA MUNOZ A., LOPEZ-PUERTAS M., NORTMANN L., YAN D., NAGEL E., YAN F., SCHMITT J.H.M.M., ACEITUNO J., AMADO P.J., CABALLERO J.A., CASASAYAS-BARRIS N., HENNING T., KHALAFINEJAD S., MOLAVERDIKHANI K., MONTES D., PALLE E., REINERS A., SCHNEIDER P.C., RIBAS I., QUIRRENBACH A., ZAPATERO OSORIO M.R. and ZECHMEISTER M.

Abstract (from CDS):

We analyze two high-resolution spectral transit time series of the hot Jupiter HAT-P-32 b obtained with the CARMENES spectrograph. Our new XMM-Newton X-ray observations of the system show that the fast-rotating F-type host star exhibits a high X-ray luminosity of 2.3 x 1029 erg/s (5-100 Å), corresponding to a flux of 6.9 x 104 erg/cm2/s at the planetary orbit, which results in an energy-limited escape estimate of about 1013 g/s for the planetary mass-loss rate. The spectral time series show significant, time-dependent absorption in the Hα and HeIλ10833 triplet lines with maximum depths of about 3.3% and 5.3%. The mid-transit absorption signals in the Hα and HeIλ10833 lines are consistent with results from one-dimensional hydrodynamic modeling, which also yields mass-loss rates on the order of 1013 g/s. We observe an early ingress of a redshifted component of the transmission signal, which extends into a redshifted absorption component, persisting until about the middle of the optical transit. While a super-rotating wind can explain redshifted ingress absorption, we find that an up-orbit stream, transporting planetary mass in the direction of the star, also provides a plausible explanation for the pre-transit signal. This makes HAT-P-32 a benchmark system for exploring atmospheric dynamics via transmission spectroscopy.

Abstract Copyright: © ESO 2021

Journal keyword(s): planets and satellites: individual: HAT-P-32 - planets and satellites: atmospheres - techniques: spectroscopic - X-rays: stars

Simbad objects: 29

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Number of rows : 29
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 BD+01 316b Pl 01 46 31.8576707085 +02 42 02.033178181           ~ 161 0
2 HAT-P-32 * 02 04 10.2774374568 +46 41 16.212315084   11.79 11.44 11.23   ~ 60 1
3 HAT-P-32b Pl 02 04 10.2775457769 +46 41 16.210382751           ~ 129 1
4 HAT-P-32c Pl 02 04 10.2775457769 +46 41 16.210382751           ~ 2 0
5 HD 15082 dS* 02 26 51.0582618096 +37 33 01.736482032   8.41 8.14     kA5hA8mF4 180 1
6 WASP-12 ** 06 30 32.7966092352 +29 40 20.263502460   12.14 11.57     G0V 287 2
7 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 707 1
8 CD-38 3220 * 07 10 24.0604565856 -39 05 50.571250476   11.00 10.51     F6V 79 0
9 CD-38 3220b Pl 07 10 24.0606039387 -39 05 50.570553937           ~ 250 0
10 LP 424-4 PM* 07 59 05.8395356736 +15 23 29.236065000   13.5   11.934   M2.0V 104 1
11 NAME LP 424-4b Pl 07 59 05.8395618539 +15 23 29.240025256           ~ 262 1
12 K2-22b Pl 11 17 55.8771414480 +02 37 08.603887613           ~ 47 0
13 K2-235b Pl 12 33 32.8440958980 -10 08 46.223886777           ~ 135 0
14 WASP-107 PM* 12 33 32.8441110816 -10 08 46.225572324   14.62 11.47     K7V 52 0
15 HAT-P-18 * 17 05 23.1475097496 +33 00 44.940001716   11.9   12.61   K2V 48 1
16 HD 185603 EB* 19 38 38.7352230144 +31 13 09.217127532   7.67 7.58     A0 46 0
17 HD 185603b Pl 19 38 38.7352870670 +31 13 09.215701765           ~ 101 0
18 BD+47 2936 EB* 19 50 50.2472976936 +48 04 51.101390496       8.8   K4V 274 2
19 BD+47 2936b Pl 19 50 50.2474562793 +48 04 51.097364378           ~ 379 1
20 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 841 1
21 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1332 1
22 HD 195689b Pl 20 31 26.3534038246 +39 56 19.765154336           ~ 227 0
23 HD 195689 SB* 20 31 26.3534153736 +39 56 19.773037500   7.59 7.56     A0 104 0
24 BD-05 5432 PM* 21 00 06.1968214728 -05 05 40.034944176   10.93 9.87     ~ 53 1
25 BD-05 5432b Pl 21 00 06.1969250596 -05 05 40.037007561           ~ 110 1
26 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1073 1
27 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1756 1
28 WASP-52b Pl 23 13 58.7575814237 +08 45 40.571306719           ~ 93 1
29 WASP-52 * 23 13 58.7576098848 +08 45 40.572305352   12.9 12.0 12.03   K2V 73 1

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2023.04.02-05:39:48

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