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Search for cool white dwarfs with GSC2

Published online by Cambridge University Press:  26 May 2016

D. Carollo ,
A. Spagna ,
M.G. Lattanzi ,
R.L. Smart ,
S.T. Hodgkin ,
L. Terranegra  and
B. Mclean
D. Carollo
Affiliation:
INAF-Osservatorio Astronomico di Torino, Strada Osservatorio 20 Pino Torinese 1-10025, Italy
A. Spagna
Affiliation:
INAF-Osservatorio Astronomico di Torino, Strada Osservatorio 20 Pino Torinese 1-10025, Italy
M.G. Lattanzi
Affiliation:
INAF-Osservatorio Astronomico di Torino, Strada Osservatorio 20 Pino Torinese 1-10025, Italy
R.L. Smart
Affiliation:
INAF-Osservatorio Astronomico di Torino, Strada Osservatorio 20 Pino Torinese 1-10025, Italy
S.T. Hodgkin
Affiliation:
Cambridge Astronomical Survey Unit, Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK
L. Terranegra
Affiliation:
INAF-Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 1-80131 Napoli, Italy
B. Mclean
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA

Abstract

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Microlensing experiments have suggested that a significant part of the dark halo of the Milky Way could be composed of matter in the form of massive compact halo objects (MACHOs). Cool ancient white dwarfs (WDs) are the natural candidates. Here we present a new survey of halo WDs and evaluate the local space density using an accurate kinematic analysis. A comparison to a revaluation of the Oppenheimer et al. result is also provided. the local space density estimated for the two independent samples is about ~ 10–5M⊙ pc–3.

Type
Part 6: The Galaxy
Information
Symposium - International Astronomical Union , Volume 220: Dark Matter in Galaxies , 2004 , pp. 207 - 208
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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