The cold dust concentrations in the colliding galaxies NGC 4038/39

Details The cold dust concentrations in the colliding galaxies NGC 4038/39 The cold dust concentrations in the colliding galaxies NGC 4038/39

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...356l..83h&link_type=abstract

Astronomy and Astrophysics, v.356, p.L83-L87 (2000)

Astronomy and Astrophysics

Astrophysics

30

Galaxies: Fundamental Parameters, Galaxies: Individual:, Galaxies: Interactions, Galaxies: Photometry, Infrared: Galaxies

Scientific paper

SCUBA 450 and 850 mu m maps of the Antennae Galaxy resolve the nuclei of NGC 4038/39 and two prominent regions in the overlap area of the galaxy disks. They coincide excellently with bright emission peaks seen on 15 mu m, 6 cm and CO maps. ISOPHOT 60 and 100 mu m maps reveal that the overlap area and the NGC 4038 nucleus are also responsible for the bulk of the far-infrared emission. In addition to the prominent emission from dust at a temperature of about 30 K, typical for active starburst galaxies, cold dust at temperatures below 20 K is found like in quiescent galaxies and dense cloud complexes. Thus, the observations suggest a common phenomenon for merging galaxies: besides the warm dust heated by active starbursts they possess simultaneously dense concentrations of cold dust which are presumably in a pre-starburst phase. The dust mass in the two overlap region knots is about 107 Msun which comprises a considerable fraction of the typical dust content of a whole spiral galaxy. Such a high concentration could be explained by an initial inelastic collision of clouds which loose their angular momentum and serve as concentrating kernels into which the other clouds rotating in the disks are running. The two submm knots seem to comprise independent kernels, since they are too far separated to be mutually triggered. Based on observations at the James Clerk Maxwell Telescope JCMT and with the Infrared Space Observatory ISO.

Affiliated with

Also associated with

No associations

Rating

The cold dust concentrations in the colliding galaxies NGC 4038/39 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The cold dust concentrations in the colliding galaxies NGC 4038/39, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The cold dust concentrations in the colliding galaxies NGC 4038/39 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-748220