Sub-mm and Far-IR Imaging of Low Surface Brightness Galaxies

Details Sub-mm and Far-IR Imaging of Low Surface Brightness Galaxies Sub-mm and Far-IR Imaging of Low Surface Brightness Galaxies

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19510410p&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #104.10; Bulletin of the American Astronomical Society, Vol. 31, p.1525

Other

1

Scientific paper

We present the preliminary results of far-IR and sub-mm observations of low surface brightness (LSB) galaxies. Ten galaxies were observed in the sub-mm at the JCMT using SCUBA of which two were detected at 850 μ m, one of which was also detected at 450 μ m. Combining this sub-mm data with existing IRAS data for these galaxies and assuming a dust emissivity of the form Qem(λ ) λ -β we find that the sub-mm fluxes favor a lower value of β than is observed in normal galaxies (1 versus 2). One of the objects has a fairly normal derived dust temperature (25--35 K depending on the assumed β ) while the other is somewhat cooler (15--25 K). Also, the inferred gas-to-dust ratios are quite high for these two objects (500--1000). In addition to the SCUBA observations, we have ISOPHOT observations of a total of 27 galaxies over a range of surface brightnesses. Of this sample, 20 galaxies were detected in at least one band. The derived dust temperatures for the galaxies detected in two or more bands are fairly normal (25--35 K). There is, however, a bias in that the detected galaxies tend to have higher surface brightnesses. None of the very LSB (μ B > 23.5) galaxies were detected and, with a couple of exceptions, the galaxies detected by ISO were also detected by IRAS. The lack of detected dust emission in the lowest surface brightness galaxies is consistent with other lines of evidence, such as their blue colors and low metallicities, that suggest at most modest amounts of dust.

Affiliated with

Also associated with

No associations

Rating

Sub-mm and Far-IR Imaging of Low Surface Brightness Galaxies 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 Sub-mm and Far-IR Imaging of Low Surface Brightness Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sub-mm and Far-IR Imaging of Low Surface Brightness Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1746949