EROS 2 proper motion survey:: Constraints on the halo white dwarfs

被引：16

作者：

Goldman, B ^{[1
]}

Afonso, C

Alard, C

Albert, JN

Amadon, A

Andersen, J

Ansari, R

Aubourg, É

Bareyre, P

Bauer, F

Beaulieu, JP

Blanc, G

Bouquet, A

Char, S

Charlot, X

Couchot, F

Coutures, C

Derue, F

Ferlet, R

Fouqué, P

Glicenstein, JF

Gould, A

Graff, D

Gros, M

Haïssinski, J

Hamadache, C

Hamilton, JC

Hardin, D

de Kat, J

Kim, A

Lasserre, T

Le Guillou, L

Lesquoy, É

Loup, C

Magneville, C

Mansoux, B

Marquette, JB

Maurice, É

Maury, A

Milsztajn, A

Moniez, M

Palanque-Delabrouille, N

Perdereau, O

Prévot, L

Regnault, N

Rich, J

Spiro, M

Tisserand, P

Vidal-Madjar, A

Vigroux, L

机构：

[1] CEA, DSM, DAPNIA, Ctr Etud Saclay, F-91191 Gif Sur Yvette, France

[2] Coll France, CNRS, IN2P3, F-75231 Paris, France

[3] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA

[4] DASGAL, F-75014 Paris, France

[5] Univ Paris 11, CNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, France

[6] Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark

[7] INSU, CNRS, Inst Astrophys, F-75014 Paris, France

[8] LESIA, Observ Meudon, F-92195 Meudon, France

[9] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[10] Univ Paris 06, CNRS, IN2P3, LPNHE, F-75252 Paris 05, France

[11] Univ Paris 07, CNRS, IN2P3, LPNHE, F-75252 Paris 05, France

[12] Observ Marseille, F-13248 Marseille 04, France

[13] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[14] European So Observ, Santiago 19, Chile

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 389卷 / 03期

关键词：

Galaxy : halo; Galaxy : kinematics and dynamics; dark matter; white dwarfs;

D O I：

10.1051/0004-6361:20020827

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We are conducting a 377degrees(2) proper motion survey in the similar toV and I bands in order to determine the cool white dwarf contribution to the Galactic dark matter. Using the 250degrees(2) for which we possess three epochs, and applying selection criteria designed to isolate halo-type objects, we find no candidates in a 5500 pc 3 effective volume for old, fast M-V = 17 white dwarfs. We check the detection efficiency by cross-matching our catalogue with Luyten's NLTT catalogue. The halo white dwarf contribution cannot exceed 5% (95% C.L.) for objects with M-V = 17 and 1 less than or equal to V - I less than or equal to 1.5. The same conclusion applies to a 14 Gyr halo composed of white dwarfs with hydrogen atmosphere, as modeled by Chabrier.

引用

页码：L69 / L73

页数：5

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