Have Milky Way MACHOs Been Found? 
Hubble Space
Telescope images hint that faint, elderly white dwarfs may account for a
significant fraction of the dark matter in the Milky Way.
References:
Ibata, R.A., H.B.
Richer, et al. In press. Faint, moving objects in the Hubble
Deep Field: Components of the dark halo? Astrophysical Journal
Letters.
Méndez, R.A.,
and D. Minniti. In press. Faint blue objects on the Hubble Deep Field
North & South as possible nearby old halo white dwarfs. Astrophysical Journal.
Further Readings:
Cowen, R. 1996.
Hubble’s deep view of the universe. Science News 149(Jan.
20):36.
______. 1995. Halo
of the Milky Way: Not so MACHO? Science News 147(April 29):261.
Sources:
Rodrigo A. Ibata
European Southern Observatory
Karl Schwarzschild Strab e 2
D-85748 Garching bei München
Germany
René A. Méndez
Cerro Tololo Inter-American Observatory
Casilla 603
La Serena, Chile
Dante Minniti
Pontificia Universidad Católica de Chile
Vicuña MacKenna 4860
Santiago, Chile
Harvey B. Richer
University of British Columbia
Department of Physics & Astronomy
2219 Main Mall
Vancouver, B.C. V6T 1Z4
Canada
From Science
News, Vol. 156, No. 12, September 18, 1999, p. 180. Copyright ©
1999, Science Service. |