2005AJ....129.2382F

Query : 2005AJ....129.2382F

2005AJ....129.2382F - Astron. J., 129, 2382-2385 (2005/May-0)

Cool versus ultracool white dwarfs.

FARIHI J.

Abstract (from CDS):

A preliminary BVRIJHK analysis of the white dwarfs SSSPM J2231-7514 and SSSPM J2231-7515 is presented. Although both stars were reported to have Teff<4000 K, the analysis here indicates Teff~4250 K for both SSSPM J2231-7514 and SSSPM J2231-7515. Given substantial scientific interest in the coolest extant degenerate stars, it is necessary to distinguish sub-4000 K objects from the bulk of cool white dwarfs. This analysis reiterates the importance of near-infrared observations in constraining the spectral energy distributions and effective temperatures of the coolest white dwarfs and briefly discusses their possible origins.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Visual - Stars: Fundamental Parameters - Stars: Individual: Alphanumeric: SSSPM J2231-7514 - Stars: Individual: Alphanumeric: SSSPM J2231-7515 - Stars: White Dwarfs

CDS comments: Par. 3.1 : SDSS 1337+00 = SDSS J133739.40+000142.8, F351-50 = [IIB2000] F351-50

Simbad objects: 14

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Number of rows : 14
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 EGGR 246 WD* 00 41 26.0270023159 -22 21 02.292155084   15.25 14.60 14.088 13.671 DQ9 120 0
2 [IIB2000] F351-50 WD* 00 45 17.796 -33 29 10.81     19.37 18.25   DA 29 0
3 LP 885-57 WD* 02 24 32.2650104462 -28 54 59.455965451   18.7 18.05 17.8   DC 32 0
4 [HSH97] WD 0346+246 WD* 03 46 46.5167876352 +24 56 02.665383264   20.13 19.04 18.18   DC 71 1
5 EGGR 426 WD* 07 50 14.5843350628 +07 11 48.917000372   17.9   16.2   DC9 74 0
6 LP 844-26 WD* 08 53 57.6910008425 -24 46 56.230289243   20.2 18.07 17.4   DC 32 1
7 NAME ER 8 WD* 13 12 56.4722073575 -47 28 07.912819252   18.45 17.11 16.32 15.72 DC 46 0
8 SDSS J133739.40+000142.9 WD* 13 37 39.4074770664 +00 01 42.663463176   20.03       DC 41 0
9 LP 70-238 WD* 16 54 01.2602291775 +62 53 54.901854552   17.7       DC9 71 1
10 GD 392B WD* 21 00 25.1483288867 +34 26 09.439834338   20.82 19.50 18.1 18.06 DC 13 0
11 SSSPM J2231-7515 WD* 22 30 33.5339081384 -75 15 24.304628824       16.17 15.51 DC12 34 1
12 SSSPM J2231-7514 WD* 22 30 39.9813622429 -75 13 55.234553688       15.924 15.33 DC9 36 1
13 EGGR 555 WD* 23 19 09.5180510356 -06 12 49.960884664   19.47 18.22     DC9 51 0
14 [OHD2001] WD J2356-209 WD* 23 56 45.0963121240 -20 54 49.940816824   21.21 20.85     DC 21 0

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