2001ApJ...549L.109H

Query : 2001ApJ...549L.109H

2001ApJ...549L.109H - Astrophys. J., 549, L109-L113 (2001/March-1)

A new very cool white dwarf discovered by the Sloan Digital Sky Survey.

HARRIS H.C., HANSEN B.M.S., LIEBERT J., VANDEN BERK D.E., ANDERSON S.F., KNAPP G.R., FAN X., MARGON B., MUNN J.A., NICHOL R.C., PIER J.R., SCHNEIDER D.P., SMITH J.A., WINGET D.E., YORK D.G., ANDERSON J.E.Jr, BRINKMANN J., BURLES S., CHEN B., CONNOLLY A.J., CSABAI I., FRIEMAN J.A., GUNN J.E., HENNESSY G.S., HINDSLEY R.B., IVEZIC Z., KENT S., LAMB D.Q., LUPTON R.H., NEWBERG H.J., SCHLEGEL D.J., SMEE S., STRAUSS M.A., THAKAR A.R., UOMOTO A. and YANNY B.

Abstract (from CDS):

Early data taken during commissioning of the Sloan Digital Sky Survey (SDSS) have resulted in the discovery of a very cool white dwarf. It appears to have stronger collision-induced absorption from molecular hydrogen than any other known white dwarf, suggesting it has a cooler temperature than any other. While its distance is presently unknown, it has a surprisingly small proper motion, making it unlikely to be a halo star. An analysis of white dwarf cooling times suggests that this object may be a low-mass star with a helium core. The SDSS imaging and spectroscopy also recovered LHS 3250, the coolest previously known white dwarf, indicating that the SDSS will be an effective tool for identifying these extreme objects.

Abstract Copyright: ∼

Journal keyword(s): Stars: Atmospheres - stars: individual (SDSSp J133739.40+000142.8) - Stars: White Dwarfs

Simbad objects: 5

Full paper

View the references in ADS

Number of rows : 5

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	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	[HSH97] WD 0346+246	WD*	03 46 46.5167876352	+24 56 02.665383264	20.13	19.04	18.18		DC	71	1
4	SDSS J133739.40+000142.9	WD*	13 37 39.4074770664	+00 01 42.663463176	20.03				DC	41	0
5	LP 70-238	WD*	16 54 01.2602291775	+62 53 54.901854552	17.7				DC9	71	1

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