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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



  history
ID: 50779.0, MPI für Astronomie / Publikationen_mpia
Galactic Starburst NGC 3603 from X-Rays to Radio
Authors:Moffat, A. F. J.; Corcoran, M. F.; Stevens, I. R.; Skalkowski, G.; Marchenko, S. V.; Mücke, A.; Ptak, A.; Koribalski, B. S.; Brenneman, L.; Mushotzky, R.; Pittard, J. M.; Pollock, A. M. T.; Brandner, W.
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Astrophysical Journal
Volume:573
Start Page:191
End Page:198
Review Status:not specified
Audience:Experts Only
Abstract / Description:NGC 3603 is the most massive and luminous
visible starburst region in the Galaxy. We
present the first Chandra ACIS-I X-ray image and
spectra of this dense, exotic object,
accompanied by a deep centimeter-wavelength
Australia Telescope Compact Array radio image at
similar <~1" spatial resolution and Hubble
Space Telescope/ground-based optical data. At
the S/N>3 level, Chandra detects several
hundred X-ray point sources (compared to the
three distinct sources seen by ROSAT). At least
40 of these sources are definitely associated
with optically identified cluster O- and W-R-type
members, but most are not. A diffuse X-ray
component is also seen out to ~2' (4 pc) from
the center, probably arising mainly from the
large number of merging/colliding hot stellar
winds and/or numerous faint cluster sources. The
point-source X-ray fluxes generally increase with
increasing bolometric brightnesses of the member
O/W-R stars, but with very large scatter. Some
exceptionally bright stellar X-ray sources may
be colliding wind binaries. The radio image shows
(1) two resolved sources, one definitely
nonthermal, in the cluster core near where the
X-ray/optically brightest stars with the
strongest stellar winds are located, (2)
emission from all three known proplyd-like
objects (with thermal and nonthermal
components), and (3) many thermal sources in the
peripheral regions of triggered star formation.
Overall, NGC 3603 appears to be a somewhat
younger and hotter scaled-down version of
typical starbursts found in other galaxies.
Free Keywords:Galaxy: Open Clusters and Associations:
; Individual: NGC Number: NGC 3603; Stars:
; Early-Type; Stars: Winds; Outflows
Comment of the Author/Creator:Date: 2002, July 1, 2002
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:Montréal, C.P. 6128, Succ. Center-Ville,
Montréal, QC H3C 3J7, Canada; and Observatoire du
mont Mégantic
<EMAIL>moffat@astro.umontreal.ca</EMAIL>,
<EMAIL>sergey@astro.umontreal.ca</EMAIL>,
<EMAIL>gwen@astro.umontreal.ca</EMAIL>.),
AB(Universities Space Research Association, 7501
Forbes Boulevard, Suite 206, Seabrook, MD 20706.;
Laboratory for High Energy Astrophysics, Goddard
Space Flight Center, Greenbelt, MD 20771;
<EMAIL>corcoran@barnegat.gsfc.nasa.gov</EMAIL>,
<EMAIL>bren@lhea1.gsfc.nasa.gov</EMAIL>,
<EMAIL>richard@xray-5.gsfc.nasa.gov</EMAIL>.),
AC(School of Physics and Astronomy, University of
Birmingham, Birmingham B15 2TT, UK;
<EMAIL>irs@star.sr.bham.ac.uk</EMAIL>.),
AD(Département de Physique, Université de
Montréal, C.P. 6128, Succ. Center-Ville,
Montréal, QC H3C 3J7, Canada; and Observatoire du
mont Mégantic
<EMAIL>moffat@astro.umontreal.ca</EMAIL>,
<EMAIL>sergey@astro.umontreal.ca</EMAIL>,
<EMAIL>gwen@astro.umontreal.ca</EMAIL>.),
AE(Département de Physique, Université de
Montréal, C.P. 6128, Succ. Center-Ville,
Montréal, QC H3C 3J7, Canada; and Observatoire du
mont Mégantic
<EMAIL>moffat@astro.umontreal.ca</EMAIL>,
<EMAIL>sergey@astro.umontreal.ca</EMAIL>,
<EMAIL>gwen@astro.umontreal.ca</EMAIL>.; Now at
Department of Physics and Astronomy, Western
Kentucky University, Thompson Complex Central
Wing, Bowling Green, KY 42101-3576
<EMAIL>sergey@astro.wku.edu</EMAIL>.),
AF(Département de Physique, Université de
Montréal, C.P. 6128, Succ. Center-Ville,
Montréal, QC H3C 3J7, Canada; and Observatoire du
mont Mégantic
<EMAIL>moffat@astro.umontreal.ca</EMAIL>,
<EMAIL>sergey@astro.umontreal.ca</EMAIL>,
<EMAIL>gwen@astro.umontreal.ca</EMAIL>.; Now at
Institut für Theoretische Physik,
Ruhr-Universität Bochum, D-44780, Germany;
<EMAIL>afm@tp4.ruhr-uni-bochum.de</EMAIL>.),
AG(Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, PA
15213; <EMAIL>ptak@cmu.edu</EMAIL>.),
AH(Australia Telescope National Facility, CSIRO,
P.O. Box 76, Epping 1710, Australia;
<EMAIL>baerbel.koribalski@atnf.csiro.au</EMAIL>.),
AI(Laboratory for High Energy Astrophysics,
Goddard Space Flight Center, Greenbelt, MD 20771;
<EMAIL>corcoran@barnegat.gsfc.nasa.gov</EMAIL>,
<EMAIL>bren@lhea1.gsfc.nasa.gov</EMAIL>,
<EMAIL>richard@xray-5.gsfc.nasa.gov</EMAIL>.),
AJ(Laboratory for High Energy Astrophysics,
Goddard Space Flight Center, Greenbelt, MD 20771;
<EMAIL>corcoran@barnegat.gsfc.nasa.gov</EMAIL>,
<EMAIL>bren@lhea1.gsfc.nasa.gov</EMAIL>,
<EMAIL>richard@xray-5.gsfc.nasa.gov</EMAIL>.),
AK(Department of Physics and Astronomy,
University of Leeds, Leeds LS2 9JT, UK;
<EMAIL>jmp@ast.leeds.ac.uk</EMAIL>.), AL(Computer
and Scientific Co. Ltd., 230 Graham Road,
Sheffield S10 3GS, UK;
<EMAIL>andy@westwood.demon.co.uk</EMAIL>.),
AM(Institute for Astronomy, University of Hawaii,
2680 Woodlawn Drive, Honolulu, HI 96822;
<EMAIL>brandner@ifa.hawaii.edu</EMAIL>.)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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