2020MNRAS.499.5318C


Query : 2020MNRAS.499.5318C

2020MNRAS.499.5318C - Mon. Not. R. Astron. Soc., 499, 5318-5324 (2020/December-3)

NLTT5306B: an inflated, weakly irradiated brown dwarf.

CASEWELL S.L., DEBES J., BRAKER I.P., CUSHING M.C., MACE G., MARLEY M.S. and KIRKPATRICK J.D.

Abstract (from CDS):

We present Spitzer observations at 3.6 and 4.5 um and a near-infrared IRTF SpeX spectrum of the irradiated brown dwarf NLTT5306B. We determine that the brown dwarf has a spectral type of L5 and is likely inflated, despite the low effective temperature of the white dwarf primary star. We calculate brightness temperatures in the Spitzer wavebands for both the model radius, and Roche Lobe radius of the brown dwarf, and conclude that there is very little day-night side temperature difference. We discuss various mechanisms by which NLTT5306B may be inflated, and determine that while low-mass brown dwarfs (M < 35 MJup) are easily inflated by irradiation from their host star, very few higher mass brown dwarfs are inflated. The higher mass brown dwarfs that are inflated may be inflated by magnetic interactions or may have thicker clouds.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): binaries: close - brown dwarfs - white dwarfs

Simbad objects: 16

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Number of rows : 16
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 2MASS J00282091+2249050 BD* 00 28 21.0025319076 +22 49 03.945991335           L7: 11 0
2 LP 468-128 WD* 01 35 32.9751928872 +14 45 55.898593668   17.1   16.6   DA+L5 38 0
3 WD 0137-349 WD* 01 39 42.8531929464 -34 42 39.577891392 14.60 15.33 15.30     DA3 83 0
4 NAME WD 0137-349B BD* 01 39 42.9 -34 42 37           L8 29 0
5 CoRoT-15b BD? 06 28 27.8204 +06 11 10.477   17.012 15.997 15.807   ~ 43 1
6 HATS-70b Pl 07 16 25.0880178844 -31 14 39.858560668           ~ 21 0
7 BD+13 1880B BD? 08 17 16.8973986331 +12 36 04.912283928           ~ 9 0
8 2MASS J08350622+1953050 BD* 08 35 06.22944 +19 53 05.0532           L5 33 0
9 2QZ J103448.9+005200 WD* 10 34 48.9329384976 +00 52 01.371664956   19.23 19.2     DA3.0 20 0
10 WASP-128b BD? 11 31 26.0933641458 -41 41 22.299023767           ~ 19 0
11 SDSS J120515.80-024222.6 WD* 12 05 15.8129733888 -02 42 22.754968128   18.42       DA 29 0
12 SDSS J141126.20+200911.1 WD* 14 11 26.2220815704 +20 09 11.039979600           DA 33 0
13 CoRoT-33b Pl? 18 38 33.9101911792 +05 37 28.787049157           ~ 19 0
14 Kepler-39b Pl 19 47 50.4745660177 +46 02 03.499173435           ~ 59 1
15 DENIS J220340.5-121511 ** 22 03 40.6044672864 -12 15 11.943387792   17.20   17.51 17.68 DAZ+L3: 17 0
16 WASP-30b BD? 23 53 38.054 -10 07 05.12           ~ 41 1

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2022.11.30-10:34:41

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