Stellar Populations and Mass-Loss in M15: A Spitzer Detection of Dust in the Intra-Cluster Medium

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dc.creatorBoyer, Martha L.
dc.creatorWoodward, Charles E.
dc.creatorvan Loon, Jacco Th.
dc.creatorGordon, Karl D.
dc.creatorEvans, A.
dc.creatorGehrz, Robert D.
dc.creatorHelton, L. A.
dc.creatorPolomski, Elisha F.
dc.date2006-06-09
dc.date.accessioned2026-07-07T11:25:41Z
dc.date.available2026-07-07T11:25:41Z
dc.descriptionWe present Spitzer Space Telescope IRAC and MIPS observations of the galactic globular cluster M15 (NGC 7078), one of the most metal-poor clusters with a [Fe/H] = -2.4. Our Spitzer images reveal a population of dusty red giants near the cluster center, a previously detected planetary nebula (PN) designated K648, and a possible detection of the intra-cluster medium (ICM) arising from mass loss episodes from the evolved stellar population. Our analysis suggests 9 (+/-2) x 10^-4 solar masses of dust is present in the core of M15, and this material has accumulated over a period of approximately 10^6 years, a timescale ten times shorter than the last galactic plane crossing event. We also present Spitzer IRS follow up observations of K648, including the detection of the [NeII] 12.81 micron line, and discuss abundances derived from infrared fine structure lines.
dc.descriptionAccepted for publication in AJ. 20 pages, 10 figures, 6 tables. Full resolution versions of figures 1, 5, 7, and 8 are available in a PDF version of this manuscript at http://ir.astro.umn.edu/~mboyer/ms_060906.pdf
dc.identifierhttps://arxiv.org/abs/astro-ph/0606236
dc.identifierhttp://arxiv.org/abs/astro-ph/0606236
dc.identifierAstron.J.132:1415-1425,2006
dc.identifierdoi:10.1086/506518
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195588
dc.subjectAstrophysics
dc.titleStellar Populations and Mass-Loss in M15: A Spitzer Detection of Dust in the Intra-Cluster Medium
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