Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329p..55o&link_type=abstract
Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.
Astronomy and Astrophysics
Astrophysics
Scientific paper
Observations of the complex interacting system, Mrk 297, were made with the Infrared Space Observatory (ISO) using the ISOCAM, ISOPHOT and ISOLWS instruments. The ISO observations reveal that the strongest peak of star formation, i.e., the strongest ISOCAM source in the system in the four bands, is at a location completely unremarkable at visible wavelengths, and does not coincide with the nuclear region of either colliding galaxy. This striking characteristic has also been observed in the Antennae system, NGC 4038/4039, and again underlines the importance of infrared observations in understanding star formation in colliding/merging systems. ISOCAM maps of Mrk 297 at 6.7, 7.7, 12, and 14.3 microns are presented, which, together with PHT-S spectrometry of the central interacting region, probe the dust-obscured star formation and the properties of the organic dust. LWS spectroscopy yields a measure of the cold dust component in the system. A supernova that exploded in 1979 is one of the most powerful known radio remnants and lies on the periphery of the strongest mid-infrared source and site of the hidden starburst. This supernova explosion may have been accompanied by a gamma-ray burst (GRB), consistent with the idea that GRBs are associated with supernovae in star-forming regions, and a search for a GRB consistent with the direction to Mrk 297, in satellite data from July to December 1979, is recommended.
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