2013ApJ...767...77S

Query : 2013ApJ...767...77S

2013ApJ...767...77S - Astrophys. J., 767, 77 (2013/April-2)

On the radii of brown dwarfs measured with AKARI near-infrared spectroscopy.

SORAHANA S., YAMAMURA I. and MURAKAMI H.

Abstract (from CDS):

We derive the radii of 16 brown dwarfs observed by AKARI using their parallaxes and the ratios of observed to model fluxes. We find that the brown dwarf radius ranges between 0.64-1.13 RJ with an average radius of 0.83 RJ . We find a trend in the relation between radii and Teff; the radius is at a minimum at Teff∼ 1600 K, which corresponds to the spectral types of mid- to late-L. The result is interpreted by a combination of radius-mass and radius-age relations that are theoretically expected for brown dwarfs older than 108 yr.

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Journal keyword(s): brown dwarfs - infrared: stars - stars: late-type - stars: low-mass

Simbad objects: 17

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Number of rows : 17
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 NAME L 362-29 BC BD* 00 04 34.8671722377 -40 44 06.463544237       19.61 16.88 L5+L5 119 0
2 L 362-29 PM* 00 04 36.4375346731 -40 44 02.880162313   14.47 12.84 12.525   M4V 88 0
3 LSPM J0036+1821 BD* 00 36 16.1118891182 +18 21 10.286665966       18.451 16.053 L3.5 230 0
4 SIMP J013656.5+093347.3 BD* 01 36 56.5605419830 +09 33 47.311965969           T2.0 167 0
5 2MASSI J0415195-093506 BD* 04 15 19.54368 -09 35 06.6732           T8.0 182 0
6 SIPS J0539-0059 BD* 05 39 52.0040375405 -00 59 01.491092352           L5V 95 0
7 2MASS J05591914-1404488 BD* 05 59 19.1872549354 -14 04 49.206913185           T4.5 159 0
8 2MASSI J0825196+211552 BD* 08 25 19.6125672818 +21 15 51.549358145       21.97 19.22 L7.5V 138 0
9 2MASS J08300825+4828482 BD* 08 30 08.1496038211 +48 28 47.538657498           L9.5 53 0
10 2MASS J12545393-0122474 BD* 12 54 53.9040607346 -01 22 47.399401142           T2e: 167 0
11 2MASS J14392836+1929149 BD* 14 39 28.1499428599 +19 29 15.908790370           L1V 145 0
12 2MASS J14460061+0024519 BD* 14 46 00.61560 +00 24 51.9660           L5V 38 0
13 GJ 570 D BD* 14 57 14.96256 -21 21 47.7504           T8 242 1
14 2MASSW J1507476-162738 BD* 15 07 47.6758255542 -16 27 40.113982846     22.136 18.928 16.579 L5V 216 0
15 * eta CrB C BD* 15 23 22.63488 +30 14 56.2092           L8V 118 1
16 2MASS J16322911+1904407 BD* 16 32 29.11416 +19 04 40.7136       22.42 19.98 L8V 145 0
17 2MASSW J2224438-015852 BD* 22 24 43.8544128559 -01 58 53.284975671           L4.5V 150 0

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