2004A&A...428..451S

Query : 2004A&A...428..451S

2004A&A...428..451S - Astronomy and Astrophysics, volume 428451-458 (2004/12-3)

Disk or halo white dwarfs? Kinematic analysis of high proper motion surveys.

SPAGNA A., CAROLLO D., LATTANZI M.G. and BUCCIARELLI B.

Abstract (from CDS):

We present an alternative method for the kinematic analysis of high proper motion surveys and discuss its application to the survey of Oppenheimer et al. (2001) for the selection of reliable halo white dwarfs (WDs). The local WD space density we estimate is ρWD≃1/2x10–5M☉/pc3, which is about an order of magnitude smaller than the value derived in Oppenheimer et al. (2001Sci...292..698O), and is consistent with the values obtained from recent reanalyses of the same data. Our result, which corresponds to a fraction of 0.1%/0.2% of the local dark matter, does not support the scenario suggested by microlensing experiments that ancient cool WDs could contribute significantly to the dark halo of the Milky Way.

Abstract Copyright: ∼

Journal keyword(s): stars: kinematics - white dwarfs - dark matter - Galaxy: stellar content - surveys - methods: statistical

Simbad objects: 1

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Number of rows : 1
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 LP 886-43 WD* 02 48 13.2018946235 -30 01 32.775965944   17.8 18.43     DC 24 0

Query : 2004A&A...428..451S

Basic data :
LP 886-43 -- White Dwarf
Other object types: otypes_help 		WD* (2001Sci,WD,...), WD? (2018MNRAS), PM* (LEHPM,LHS,...), * (LP,USNO,...)
ICRS coord. (ep=J2000) : 		02 48 13.2018946235 -30 01 32.775965944 (Optical) [ 0.0696 0.1104 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		02 46 03.5853804389 -30 14 16.518751440 [ 0.0696 0.1104 90 ]
Gal coord. (ep=J2000) : 		226.3435623964722 -64.2674774354296 [ 0.0696 0.1104 90 ]
Proper motions mas/yr : 		444.838 323.693 [0.164 0.176 90] A 2020yCat.1350....0G
Parallaxes (mas): 		12.7432 [0.1636] A 2020yCat.1350....0G
Spectral type: 		DC D 2001Sci...292..698O
Fluxes (3) :
B 17.8 [~] E ~
V 18.43 [~] E ~
G 18.342787 [0.003033] C 2020yCat.1350....0G
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Identifiers (9) :
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WD 0246-302 LP 886-43 [SRH2004] 19
LEHPM 2791 NLTT 9030 Gaia DR2 5065611697758431360
LHS 1447 USNO-B1.0 0599-00027484 Gaia DR3 5065611697758431360

References (24 between 1850 and 2026) (Total 24)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Distance : 2    Fe/H : 1    Plx : 2    PM : 5    SpT : 3   

   

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Link by name to the catalogue in VizieR :

WD 0246-302 LHS 1447 NLTT 9030 USNO-B1.0 0599-00027484 Gaia DR2 5065611697758431360
Gaia DR3 5065611697758431360

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