2011ApJ...728...85J

Query : 2011ApJ...728...85J

2011ApJ...728...85J - Astrophys. J., 728, 85 (2011/February-3)

Near-infrared multi-band photometry of the substellar companion GJ 758 b.

JANSON M., CARSON J., THALMANN C., McELWAIN M.W., GOTO M., CREPP J., WISNIEWSKI J., ABE L., BRANDNER W., BURROWS A., EGNER S., FELDT M., GRADY C.A., GOLOTA T., GUYON O., HASHIMOTO J., HAYANO Y., HAYASHI M., HAYASHI S., HENNING T., HODAPP K.W., ISHII M., IYE M., KANDORI R., KNAPP G.R., KUDO T., KUSAKABE N., KUZUHARA M., MATSUO T., MAYAMA S., MIYAMA S., MORINO J.-I., MORO-MARTIN A., NISHIMURA T., PYO T.-S., SERABYN E., SUTO H., SUZUKI R., TAKAMI M., TAKATO N., TERADA H., TOFFLEMIRE B., TOMONO D., TURNER E.L., WATANABE M., YAMADA T., TAKAMI H., USUDA T. and TAMURA M.

Abstract (from CDS):

GJ 758 B is a cold (∼600 K) companion to a Sun-like star at 29 AU projected separation, which was recently detected with high-contrast imaging. Here, we present photometry of the companion in seven photometric bands from Subaru/HiCIAO, Gemini/NIRI, and Keck/NIRC2, providing a rich sampling of the spectral energy distribution in the 1-5 µm wavelength range. A clear detection at 1.58 µm combined with an upper limit at 1.69 µm shows methane absorption in the atmosphere of the companion. The mass of the companion remains uncertain, but an updated age estimate indicates that the most likely mass range is ∼30-40 Mjup. In addition, we present an updated astrometric analysis that imposes tighter constraints on GJ 758 B's orbit and identifies the proposed second candidate companion, "GJ 758 C," as a background star.

Abstract Copyright: ∼

Journal keyword(s): brown dwarfs - planetary systems - techniques: high angular resolution

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
2 HD 162208 PM* 17 47 58.5586633320 +39 58 50.962376460   7.79 7.60     A0 77 0
3 HD 161903 * 17 48 19.2234974760 -01 48 29.720389644   8.02 7.74     A4IV/V 63 0
4 Wolf 1062 ** 19 12 14.6156897487 +02 53 11.438190161 13.722 12.663 11.143 10.016 8.534 M3.5V 153 0
5 HD 182488C BD* 19 23 34.0126 +33 13 19.078           L 3 0
6 HD 182488 PM* 19 23 34.0131683760 +33 13 19.078425912       5.8   K0V 306 1
7 HD 182488B BD* 19 23 34.0227 +33 13 19.041           T9 79 0
8 HD 226294 * 19 52 41.4761357568 +33 17 00.649335660   10.84 9.955     ~ 3 0
9 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1285 0

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