2009ApJ...704.1098L


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.24CEST07:49:58

2009ApJ...704.1098L - Astrophys. J., 704, 1098-1106 (2009/October-3)

Near-infrared observations of GQ Lup b using the Gemini integral field spectrograph NIFS.

LAVIGNE J.-F., DOYON R., LAFRENIERE D., MAROIS C. and BARMAN T.

Abstract (from CDS):

We present new JHK spectroscopy (R ∼ 5000) of GQ Lup b, acquired with the Near-Infrared Integral Field Spectrograph and the adaptive optics system ALTAIR at the Gemini North telescope. Angular differential imaging was used in the J and H bands to suppress the speckle noise from GQ Lup A; we show that this approach can provide improvements in signal-to-noise ratio (S/N) by a factor of 2-6 for companions located at subarcsecond separations. Based on high-quality observations and Global Astrometric lnterferometer for Astrophysics synthetic spectra, we estimate the companion effective temperature to Teff = 2400±100 K, its gravity to log g = 4.0±0.5, and its luminosity to log(L/L ) = -2.47±0.28. Comparisons with the predictions of the DUSTY evolutionary tracks allow us to constrain the mass of GQ Lup b to 8-60 MJup, most likely in the brown dwarf regime. Compared with the spectra published by Seifahrt and collaborators, our spectra of GQ Lup b are significantly redder (by 15%-50%) and do not show important Paβ emission. Our spectra are in excellent agreement with the lower S/N spectra previously published by McElwain and collaborators.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: individual: GQ Lup - stars: low-mass, brown dwarfs - stars: pre-main sequence - techniques: high angular resolution - techniques: spectroscopic

Simbad objects: 18

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Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 2MASSW J0015447+351603 BD* 00 15 44.7737086408 +35 16 02.639395150           L1.0V 35 0
2 2MASS J01415823-4633574 BD* 01 41 58.2345784233 -46 33 57.347491326           L2 62 0
3 Cl* Melotte 22 KPNO 2 BD* 03 45 43.1604506693 +25 40 23.246972754         17.36 L0 112 0
4 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1597 1
5 LP 666-9 BD* 08 53 36.1607609203 -03 29 32.201339067   20.8 18.959 16.781 14.487 M9Ve 219 0
6 V* CT Cha Or* 11 04 09.0989057683 -76 27 19.326914289   13.44 13.00   10.89 K7Ve 106 1
7 HD 123344 * 14 07 47.4156526457 -34 56 58.073769768   7.37 7.33     A0V 15 0
8 2MASSI J1506544+132106 BD* 15 06 54.3298685056 +13 21 06.041740524           L3 81 0
9 CD-35 10525B BD* 15 49 12.09 -35 39 03.9           L1.5 94 1
10 CD-35 10525 TT* 15 49 12.102 -35 39 05.12 12.19 12.36 11.40     K7Ve 229 1
11 2MASS J16083048-2335109 BD* 16 08 30.4955677227 -23 35 10.992528583           M9.00 18 0
12 1RXS J160929.1-210524 pr* 16 09 30.3076191853 -21 04 58.945280778   13.67   12.36 10.99 M0.0e 72 2
13 2MASS J16130232-2124283 BD* 16 13 02.32 -21 24 28.4           L0 13 0
14 [LHJ2006] J163919.15-253409.9 * 16 39 19.15 -25 34 09.4           ~ 13 0
15 HD 152384 * 16 54 26.3943538643 -33 28 31.275515864   7.07 7.04     A0V 8 0
16 2MASSI J1658037+702701 BD* 16 58 03.8018285595 +70 27 01.703368353       19.0   L1 32 0
17 * alf PsA ** 22 57 39.04625 -29 37 20.0533 1.31 1.25 1.16 1.11 1.09 A4V 1099 3
18 HD 218396 El* 23 07 28.7156905667 +21 08 03.302133882   6.21 5.953     F0+VkA5mA5 854 1

    Equat.    Gal    SGal    Ecl

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2019.10.24-07:49:58

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