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The postcollapse core of M15 imaged with the HST planetary cameraIt is shown here that, despite the severe spherical aberration present in the HST, the Wide Field/Planetary Camera (WFPC) images still present useful high-resolution information on M15, the classic candidate for a cluster with a collapsed core. The stars in M15 have been resolved down to the main-sequence turnoff and have been subtracted from the images. The remaining faint, unresolved stars form a diffuse background with a surprisingly large core with r(c) = 0.13 pc. The existence of a large core interior to the power-law cusp may imply that M15 has evolved well past maximum core collapse and may rule out the presence of a massive central black hole as well.
Document ID
19910041863
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lauer, Tod R.
(Kitt Peak National Observatory Tucson, AZ, United States)
Holtzman, Jon A.
(Lowell Observatory Flagstaff, AZ, United States)
Faber, S. M.
(Lick Observatory Santa Cruz, CA, United States)
Baum, William A.
(Washington, University Seattle, 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. Jeff
(California Institute of Technology Pasadena, United States)
Kelsall, T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
March 10, 1991
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 369
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A26486
Funding Number(s)
CONTRACT_GRANT: NAS5-25421
Distribution Limits
Public
Copyright
Other

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