2022AJ....164...63G


Query : 2022AJ....164...63G

2022AJ....164...63G - Astron. J., 164, 63-63 (2022)

Limits on the Auroral Generation of H3+ in Brown Dwarf and Extrasolar Giant Planet Atmospheres with the Keck Near Infrared Echelle Spectrograph.

GIBBS A. and FITZGERALD M.P.

Abstract (from CDS):

The molecular ion H3+ is a potentially powerful tracer of the ionospheres and thermal structures of Jovian planets but has never been detected in a planetary mass object outside of the solar system. Models predict that H3+ emission driven by EUV flux and solar wind on hot Jupiters, or by powerful aurorae on brown dwarfs, will be between 102 and 105 x more intense than that of Jupiter. If optimal conditions for the production of emission do exist, the emission may be detectable by current ground-based instruments or in the near future. We present the first search for H3+ line emission in brown dwarfs with Keck Near Infrared Echelle Spectrograph L' high-resolution spectroscopy. Additionally, we survey stars hosting giant planets at semimajor axes near 0.1-0.2 au, which models suggest may be the best planetary targets. No candidate H3+ emission is found. The limits we place on the emission of H3+ from brown dwarfs indicate that auroral generation of H3+ in these environments likely does not linearly scale from the processes found on Jupiter, plausibly due to deeper atmospheric penetration by precipitating auroral electrons. Detection of H3+ emission in brown dwarfs may be possible with the James Webb Space Telescope, or future 33 m class telescopes.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet astronomy - Exoplanet atmospheres - Brown dwarfs - Hot Jupiters - Star-planet interactions - Extrasolar gaseous giant planets

Simbad objects: 27

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Number of rows : 27
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 LSPM J0036+1821 BD* 00 36 16.1118891182 +18 21 10.286665966       18.451 16.053 L3.5 204 0
2 * ups And PM* 01 36 47.8415443907 +41 24 19.651368029 4.70 4.64 4.10 3.64 3.35 F9V 936 1
3 * ups And d Pl 01 36 47.84216 +41 24 19.6443           ~ 159 1
4 * ups And c Pl 01 36 47.84216 +41 24 19.6443           ~ 153 1
5 * ups And b Pl 01 36 47.84216 +41 24 19.6443           ~ 265 1
6 SIMP J013656.5+093347.3 BD* 01 36 56.5605419830 +09 33 47.311965969           T2.0 118 0
7 GD 1400 WD* 01 47 21.8246176800 -21 56 51.386849088   15.38 15.15 15.42   DA4.1 81 0
8 HD 13445 PM* 02 10 25.9181700303 -50 49 25.465181208   6.945 6.117     K1.5V 438 1
9 NAME Scholz's star LM* 07 20 03.25368 -08 46 49.9044   19.9   16.9 13.80 M9.5+T5 50 0
10 * rho01 Cnc PM* 08 52 35.8111044043 +28 19 50.954994470 7.45 6.82   5.4   K0IV-V 1059 1
11 * rho01 Cnc b Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 251 1
12 * rho01 Cnc c Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 135 1
13 * rho01 Cnc d Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 147 1
14 * rho01 Cnc f Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 55 1
15 Ross 905 PM* 11 42 11.0933350978 +26 42 23.650782778   12.06 10.613 10.272 8.24 M3V 592 1
16 * tau Boo b Pl 13 47 15.74340 +17 27 24.8552           ~ 269 1
17 LSR J1835+3259 PM* 18 35 37.8801226673 +32 59 53.316099140   20.0   17.1   M8.5V 119 0
18 HD 192263b Pl 20 13 59.8455148268 -00 52 00.771665295           ~ 60 1
19 HD 192263 BY* 20 13 59.8455790536 -00 52 00.769626768 9.447 8.724 7.767 7.231 6.771 K1/2V 232 1
20 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1070 1
21 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1741 1
22 BD-15 6290b Pl 22 53 16.7323107416 -14 15 49.303409936           ~ 240 1
23 BD-15 6290c Pl 22 53 16.7323107416 -14 15 49.303409936           ~ 185 1
24 BD-15 6290 BY* 22 53 16.7325836486 -14 15 49.304052185 12.928 11.749 10.192 9.013 7.462 M3.5V 955 1
25 HD 217107 ** 22 58 15.5408995872 -02 23 43.383234768   6.919 6.163     G8IV/V 354 1
26 HD 217107c Pl 22 58 15.5411942071 -02 23 43.387117210           ~ 57 1
27 HD 217107b Pl 22 58 15.5411942071 -02 23 43.387117210           ~ 90 1

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2023.01.28-11:28:33

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