# 2006AJ....132.1267S

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 Query : 2006AJ....132.1267S

2006AJ....132.1267S - Astron. J., 132, 1267-1274 (2006/September-0)

No detectable H+3Emission from the atmospheres of hot Jupiters.

SHKOLNIK E., GAIDOS E. and MOSKOVITZ N.

Abstract (from CDS):

H+3emission is the dominant cooling mechanism in Jupiter's thermosphere and a useful probe of temperature and ion densities. The H+3ion is predicted to form in the thermospheres of close-in hot Jupiters'', where its emission would be a significant factor in the thermal energy budget, affecting temperature and the rate of hydrogen escape from the exosphere. Hot Jupiters are predicted to have up to 105 times Jupiter's H+3emission because they experience extreme stellar irradiation and enhanced interactions may occur between the planetary magnetosphere and the stellar wind. Direct (but unresolved) detection of an extrasolar planet, or the establishment of useful upper limits, may be possible because a small but significant fraction of the total energy received by the planet is reradiated in a few narrow lines of H+3within which the flux from the star is limited. We present the observing strategy and results of our search for emission from the Q(1,0) transition of H+3(3.953 µm) from extrasolar planets orbiting six late-type dwarfs using CSHELL, the high-resolution echelle spectrograph on NASA's Infrared Telescope Facility. We exploited the time-dependent Doppler shift of the planet, which can be as large as 150 km/s, by differencing spectra between nights, thereby removing the stellar photospheric signal and telluric lines. We set limits on the H+3emission from each of these systems and compare them with models in the literature. Ideal candidates for future searches are intrinsically faint stars, such as M dwarfs, at very close distances.

Journal keyword(s): Stars: Planetary Systems - Stars: Individual: Constellation Name: υ Andromedae - stars: individual (HD 46375) - Stars: Individual: Constellation Name: 55 Cancri - stars: individual (GJ 436) - Stars: Individual: Constellation Name: τ Bootis - stars: individual (HD 217101) - Stars: Late-Type

CDS comments: In keywords : HD 217101 is a misprint for HD 217107

Full paper

 Number of rows : 24
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 * ups And PM* 01 36 47.8415443907 +41 24 19.651368029 4.70 4.64 4.10 3.64 3.35 F9V 937 1
2 * ups And c Pl 01 36 47.84216 +41 24 19.6443           ~ 153 1
3 * ups And b Pl 01 36 47.84216 +41 24 19.6443           ~ 265 1
4 * ups And d Pl 01 36 47.84216 +41 24 19.6443           ~ 159 1
5 HD 46375 PM* 06 33 12.6224391648 +05 27 46.528531452   8.70 7.84     G9V 226 2
6 HD 46375b Pl 06 33 12.6225933827 +05 27 46.527797938           ~ 65 1
7 * rho01 Cnc PM* 08 52 35.8111044043 +28 19 50.954994470 7.45 6.82   5.4   K0IV-V 1061 1
8 * rho01 Cnc e Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 519 1
9 * rho01 Cnc b Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 251 1
10 * rho01 Cnc d Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 147 1
11 * rho01 Cnc c Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 135 1
12 Ross 905 PM* 11 42 11.0933350978 +26 42 23.650782778   12.06 10.613 10.272 8.24 M3V 592 1
13 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 739 1
14 * tau Boo Ro* 13 47 15.7381720026 +17 27 24.809555600 5.02 4.98 4.49 4.09 3.85 F7IV-V 953 1
15 * tau Boo b Pl 13 47 15.74340 +17 27 24.8552           ~ 269 1
16 * sig Boo PM* 14 34 40.8173867232 +29 44 42.457673940 4.76 4.84 4.47 4.13 3.94 F4VkF2mF1 592 0
17 HD 141569 Y*O 15 49 57.7482550392 -03 55 16.341617064 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 511 0
18 NAME V672 Lyr b Pl 19 04 09.8516024106 +36 37 57.445911611           ~ 325 1
19 HD 179949b Pl 19 15 33.2300861317 -24 10 45.673372382           ~ 117 1
20 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1323 1
21 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1743 1
22 HD 217107 ** 22 58 15.5408995872 -02 23 43.383234768   6.919 6.163     G8IV/V 354 1
23 HD 217107c Pl 22 58 15.5411942071 -02 23 43.387117210           ~ 57 1
24 HD 217107b Pl 22 58 15.5411942071 -02 23 43.387117210           ~ 90 1

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2023.02.06-08:05:52