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Planetary camera observations of the central parsec of M32New HST observations are reported which show that the M32 nucleus is extremely dense, with rho0 not less than 4 x 10 exp 6 solar masses/cu pc if M32 has a core with rc not greater than 0.37 pc, and rho0 greater than 3 x 10 exp 7 solar masses/cu pc if it instead has a central r exp -1/2 cusp. Limits on the M32 core radius are nearly three times smaller, and those on the central density at least four times greater, than values inferred from the best ground-based observations. A central relaxation that is almost an order of magnitude shorter than previous estimates is inferred from the new core parameters; a shorter stellar collision time is also inferred. It is argued that a starlight cusp surrounds the central black hole.
Document ID
19920067106
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lauer, Tod R.
(Kitt Peak National Observatory Tucson, AZ, United States)
Faber, S. M.
(Lick Observatory Santa Cruz, CA, United States)
Currie, Douglas G.
(Maryland, University College Park, United States)
Ewald, S. P.
(Space Telescope Science Institute Baltimore, MD, United States)
Groth, Edward J.
(Princeton University NJ, United States)
Hester, J. J.
(Arizona State University Tempe, United States)
Holtzman, Jon A.
(Lowell Observatory Flagstaff, AZ, United States)
Light, Robert M.
(Lick Observatory Santa Cruz, CA, United States)
O'Neil, Earl J., Jr.
(Kitt Peak National Observatory Tucson, AZ, United States)
Shaya, Edward J.
(Maryland, University College Park, United States)
Date Acquired
August 15, 2013
Publication Date
August 1, 1992
Publication Information
Publication: Astronomical Journal
Volume: 104
Issue: 2 Au
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
92A49730
Funding Number(s)
CONTRACT_GRANT: NAS5-1661
CONTRACT_GRANT: NAS5-26555
Distribution Limits
Public
Copyright
Other

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