Sub-millimeter emission from type Ia supernova host galaxies at z=0.5

Details Sub-millimeter emission from type Ia supernova host galaxies at z=0.5 Sub-millimeter emission from type Ia supernova host galaxies at z=0.5

2003-12-03

arxiv.org/abs/astro-ph/0312111v1

Astrophys.J. 603 (2004) 489-494; New Astron.Rev. 48 (2004) 629-631

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures. ApJ accepted

Scientific paper

10.1086/381487

We present deep sub-millimetre observations of seventeen galaxies at z=0.5, selected through being hosts of a type 1a supernova. Two galaxies are detected directly, and the sample is detected statistically with a mean 850 micron flux of 1.01mJy +/- 0.33mJy, which is 25% - 135% higher than locally. We infer that the mean value of A_v in normal galaxies at z=0.5 is comparable to or greater than the mean A_v in local normal galaxies, in agreement with galaxy chemical evolution models and indirect observational evidence. Scaling from the local value given by Rowan-Robinson (2003) gives a mean extinction at z=0.5 of A_v = 0.56 +/- 0.17. The dust in the brightest sub-mm object in our sample is best interpreted as normal `cirrus' dust similar to that seen locally. The detection rate of our sample suggests that some sources found in blank-field sub-mm surveys may not be high redshift starbursts, but rather cirrus galaxies at moderate redshifts and with lower star formation rates. Finally, an increase in host dust extinction with redshift may impact the cosmological results from distant supernova searches. This emphasizes the need to carefully monitor dust extinction when using type Ia supernovae to measure the cosmological parameters.

Affiliated with

Also associated with

No associations

Rating

Sub-millimeter emission from type Ia supernova host galaxies at z=0.5 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-millimeter emission from type Ia supernova host galaxies at z=0.5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sub-millimeter emission from type Ia supernova host galaxies at z=0.5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-630165