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Structure of the nuclear stellar cluster of the Milky Way galaxy
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SYSNO ASEP 0442418 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Structure of the nuclear stellar cluster of the Milky Way galaxy Author(s) Kunneriath, Devaky (ASU-R) RID
Schödel, R. (DE)
Stolovy, S. (US)
Feldmeier, A. (DE)Source Title The Galactic center: Feeding and Feedback in a Normal Galactic Nucleus. - Cambridge : Cambridge University Press, 2014 / Sjouwerman L.O. - ISSN 1743-9213 - ISBN 9781107044616 Pages s. 228-229 Number of pages 2 s. Publication form Print - P Action Symposium of the International Astronomical Union /303./ Event date 30.09.2013-04.10.2013 VEvent location Santa Fe Country US - United States Event type WRD Language eng - English Country GB - United Kingdom Keywords nuclear stellar cluster ; Spitzer MIR images Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics OECD category Astronomy (including astrophysics,space science) Institutional support ASU-R - RVO:67985815 UT WOS 000450812600054 EID SCOPUS 84901421657& DOI 10.1017/S1743921314000623 Annotation Nuclear star clusters are unambiguously detected in about 50-70% of spiral and spheroidal galaxies. They have typical half-light radii of 2-5 pc, dynamical mass ranging from 106 - 107 M-circle, are brighter than globular clusters, and obey similar scaling relations with host galaxies as supermassive black holes. The nuclear stellar cluster (NSC) which surrounds Sgr A*, the SMBH at the center of our galaxy, is the nearest nuclear cluster to us, and can be resolved to scales of milliparsecs. The strong and highly variable extinction towards the Galactic center makes it very hard to infer the intrinsic properties of the NSC (structure and size). We attempt a new way to infer its properties by using Spitzer MIR images in a wavelength range 3-8 μm where the extinction is at a minimum, and the NSC clearly stands out as a separate structure. We present results from our analysis, including extinction-corrected images and surface brightness profiles of the central few hundred parsecs of the Milky Way. Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2015
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