2017AJ....153..182C

Query : 2017AJ....153..182C

2017AJ....153..182C - Astron. J., 153, 182-182 (2017/April-0)

1-2.4 µm Near-IR spectrum of the giant planet β Pictoris b obtained with the Gemini Planet Imager.

CHILCOTE J., PUEYO L., DE ROSA R.J., VARGAS J., MACINTOSH B., BAILEY V.P., BARMAN T., BAUMAN B., BRUZZONE S., BULGER J., BURROWS A.S., CARDWELL A., CHEN C.H., COTTEN T., DILLON D., DOYON R., DRAPER Z.H., DUCHENE G., DUNN J., ERIKSON D., FITZGERALD M.P., FOLLETTE K.B., GAVEL D., GOODSELL S.J., GRAHAM J.R., GREENBAUM A.Z., HARTUNG M., HIBON P., HUNG L.-W., INGRAHAM P., KALAS P., KONOPACKY Q., LARKIN J.E., MAIRE J., MARCHIS F., MARLEY M.S., MAROIS C., METCHEV S., MILLAR-BLANCHAER M.A., MORZINSKI K.M., NIELSEN E.L., NORTON A., OPPENHEIMER R., PALMER D., PATIENCE J., PERRIN M., POYNEER L., RAJAN A., RAMEAU J., RANTAKYRO F.T., SADAKUNI N., SADDLEMYER L., SAVRANSKY D., SCHNEIDER A.C., SERIO A., SIVARAMAKRISHNAN A., SONG I., SOUMMER R., THOMAS S., WALLACE J.K., WANG J.J., WARD-DUONG K., WIKTOROWICZ S. and WOLFF S.

Abstract (from CDS):

Using the Gemini Planet Imager located at Gemini South, we measured the near-infrared (1.0-2.4 µm) spectrum of the planetary companion to the nearby, young star β Pictoris. We compare the spectrum obtained with currently published model grids and with known substellar objects and present the best matching models as well as the best matching observed objects. Comparing the empirical measurement of the bolometric luminosity to evolutionary models, we find a mass of 12.9 ± 0.2 MJup, an effective temperature of 1724 ± 15 K, a radius of 1.46 ± 0.01 RJup, and a surface gravity of logg=4.18±0.01 [dex] (cgs). The stated uncertainties are statistical errors only, and do not incorporate any uncertainty on the evolutionary models. Using atmospheric models, we find an effective temperature of 1700-1800 K and a surface gravity of logg=3.5-4.0 [dex] depending upon the model. These values agree well with other publications and with "hot-start" predictions from planetary evolution models. Further, we find that the spectrum of β Pic b best matches a low surface gravity L2 ± 1 brown dwarf. Finally, comparing the spectrum to field brown dwarfs, we find the the spectrum best matches 2MASS J04062677-381210 and 2MASS J03552337+1133437.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): instrumentation: adaptive optics - planetary systems - stars: individual: beta Pictoris - techniques: spectroscopic - techniques: spectroscopic

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME THA As* 00 00 -62.0           ~ 468 0
2 2MASS J01415823-4633574 BD* 01 41 58.2329929560 -46 33 57.347594316           L0gamma 69 0
3 2MASS J03552337+1133437 BD* 03 55 23.3735910810 +11 33 43.797034332           L5gamma 113 0
4 2MASS J04062677-3812102 BD* 04 06 26.77344 -38 12 10.2492           L2 10 0
5 * 51 Eri b Pl 04 37 36.1326090888 -02 28 24.775726260           ~ 180 0
6 2MASSI J0518461-275645 BD* 05 18 46.1651510160 -27 56 45.713630832           L1.0V 29 0
7 2MASSI J0536199-192039 BD* 05 36 20.0168030088 -19 20 40.151155452           L2 23 0
8 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1905 1
9 * bet Pic b Pl 05 47 17.0876901 -51 03 59.441135           ~ 511 1
10 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 471 0
11 HD 95086b Pl 10 57 03.0215719872 -68 40 02.449216128           ~ 102 1
12 TWA 27B BD* 12 07 33.50 -39 32 54.4           L3 281 0
13 NAME HD 131399Ab err 14 54 25.3 -34 08 34           ~ 23 1
14 2MASS J15515237+0941148 BD* 15 51 52.37904 +09 41 14.8884           L4gamma 20 0
15 RX J1609.5-2105B LM* 16 09 30.377 -21 04 56.97           ~ 118 0
16 2MASSW J2208136+292121 BD* 22 08 13.63056 +29 21 21.5352           L3gamma 54 0
17 2MASS J22134491-2136079 BD* 22 13 44.9168962584 -21 36 08.229763260           L0gamma 27 0
18 2MASS J22351658-3844154 BD* 22 35 16.5859080768 -38 44 15.434825892           L1.5 6 0
19 2MASS J22443167+2043433 BD* 22 44 31.67376 +20 43 43.3020           L6-L8gamma 99 0
20 * 51 Peg b Pl 22 57 27.9804852576 +20 46 07.797040104           ~ 666 1
21 * alf PsA b Pl 22 57 39.04625 -29 37 20.0533           ~ 201 1
22 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1139 0

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