2004ApJ...612L.129G

Query : 2004ApJ...612L.129G

2004ApJ...612L.129G - Astrophys. J., 612, L129-L132 (2004/September-2)

Discovery of new ultracool white dwarfs in the Sloan Digital Sky Survey.

GATES E., GYUK G., HARRIS H.C., SUBBARAO M., ANDERSON S., KLEINMAN S.J., LIEBERT J., BREWINGTON H., BRINKMANN J., HARVANEK M., KRZESINSKI J., LAMB D.Q., LONG D., NEILSEN E.H.Jr, NEWMAN P.R., NITTA A. and SNEDDEN S.A.

Abstract (from CDS):

We report the discovery of five new white dwarfs in the Sloan Digital Sky Survey. Four are ultracool, exhibiting strong collision-induced absorption (CIA) from molecular hydrogen and are similar in color to the three previously known coolest white dwarfs, SDSS J1337+00, LHS 3250, and LHS 1402. The fifth star shows milder CIA flux suppression and has a color and spectral shape similar to WD 0346+246. All five new white dwarfs are faint (g>18.9) and have significant proper motions. One of the new ultracool white dwarfs, SDSS J0947, appears to be in a binary system with a slightly warmer (Teff∼5000 K) white dwarf companion.

Abstract Copyright: ∼

Journal keyword(s): Stars: Individual: Alphanumeric: SDSS J0854+35 - Stars: Individual: Alphanumeric: SDSS J0947+44 - Stars: Individual: Alphanumeric: SDSS J1001+39 - Stars: Individual: Alphanumeric: SDSS J1220+09 - Stars: Individual: Alphanumeric: SDSS J1403+45 - Stars: White Dwarfs

CDS comments: SSSPM J2213-7514 and SSSPM J2213-7515 are misprint for SSSPM J2231-7514 and SSSPM J2231-7515.

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 - 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 LP 844-26 WD* 08 53 57.6910008425 -24 46 56.230289243   20.2 18.07 17.4   DC 32 1
6 SDSS J085443.33+350352.7 WD* 08 54 43.3581721104 +35 03 53.275220424   21.0 19.80 19.3   DC 16 0
7 SDSS J094722.98+445948.6 WD* 09 47 22.9849338720 +44 59 48.599009196   19.6 19.12 18.7   DC 22 0
8 SDSS J094724.45+450001.8 WD* 09 47 24.4486501440 +45 00 01.853101692   19.7 19.09 18.9   DA 15 0
9 SDSS J100103.42+390340.4 WD* 10 01 03.5003440530 +39 03 41.043364897   20.42 19.68     DC 17 0
10 SDSS J122048.65+091412.1 WD* 12 20 48.7014864141 +09 14 13.077693781   20.90 19.67     DC 14 0
11 SDSS J133739.40+000142.9 WD* 13 37 39.4074770664 +00 01 42.663463176   20.03       DC 41 0
12 LSPM J1403+4533 WD* 14 03 24.7543609728 +45 33 33.020709048   19.37 18.81 18.9   DC 25 0
13 LP 70-238 WD* 16 54 01.2602291775 +62 53 54.901854552   17.7       DC9 71 1
14 GD 392B WD* 21 00 25.1483288867 +34 26 09.439834338   20.82 19.50 18.1 18.06 DC 13 0
15 SSSPM J2231-7515 WD* 22 30 33.5339081384 -75 15 24.304628824       16.17 15.51 DC12 34 1
16 SSSPM J2231-7514 WD* 22 30 39.9813622429 -75 13 55.234553688       15.924 15.33 DC9 36 1

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