2003A&A...403..547D


Query : 2003A&A...403..547D

2003A&A...403..547D - Astronomy and Astrophysics, volume 403, 547-553 (2003/5-4)

The quest for hot gas in the halo of NGC 1511.

DAHLEM M., EHLE M., JANSEN F., HECKMAN T.M., WEAVER K.A. and STRICKLAND D.K.

Abstract (from CDS):

XMM-Newton observations of the starburst galaxy NGC 1511 reveal the presence of a previously unknown extended hot gaseous phase of its ISM, which partly extends out of the disk plane. The emission distribution is asymmetric, being brightest in the eastern half of the galaxy, where also radio continuum observations suggest the highest level of star formation. Spectral analysis of the integral 0.2-12keV X-ray emission from NGC 1511 indicates a complex emission composition. A model comprising a power law plus thermal plasma component, both absorbed by foreground gas, cannot explain all details of the observed spectrum, requiring a third spectral component to be added. This component can be a second thermal plasma, but other spectral models can be fitted as well. Its X-ray properties characterize NGC 1511 as a starburst galaxy. The X-ray-to-infrared luminosity ratio is consistent with this result. Together with the X-ray data, XMM-Newton obtained UV images of NGC 1511, tracing massive stars heating the ambient gas, which is then seen in Hα emission. UV, Hα and near-infrared imagery suggest that NGC 1511 is disturbed, most likely by its two small companions, NGC 1511a and NGC 1511b.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 1511 - galaxies: general - galaxies: ISM - galaxies: starburst

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 XMMU J035936.6-673736 X 03 59 36.6 -67 37 36           ~ 1 0
2 NGC 1511 GiP 03 59 36.98373 -67 38 03.3430   11.97   10.74 11.1 ~ 127 0

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2023.02.01-20:44:38

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