On the supernovae heating of intergalactic medium

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

submitted to MNRAS, LaTeX, 15 pages, 5 figures, 2 tables

Scientific paper

We present estimates of the energy input from supernovae (SNe) into the intergalactic medium using (i) recent measurements of Si and Fe abundances in the intracluster medium (ICM) and (ii) self-consistent gasdynamical galaxy formation simulations that include processes of cooling, star formation, SNe feedback, and a multi-phase model of the interstellar medium. We estimate the energy input from observed abundances using two different assumptions: (i) spatial uniformity of metal abundances in the ICM and (ii) radial abundance gradients. We show that these two cases lead to energy input estimates which are different by an order of magnitude, highlighting a need for observational data on large-scale abundance gradients in clusters. Analysis of galaxy formation results and estimates from observed Fe and Si abundances indicates that the SNe energy input can be important for heating of the entire ICM (providing energy of ~1 keV per particle) only if the ICM abundances are uniform and the efficiency of gas heating by SN explosions is close to 100% (implying that all of the initial kinetic energy of the explosion goes into heating of the ICM). We conclude that unless these most favorable conditions are met, SNe alone are unlikely to provide sufficient energy input to heat all of the cluster ICM and may need to be supplemented or even substituted by some other heating process(es). (Abridged)

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

On the supernovae heating of intergalactic medium 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 On the supernovae heating of intergalactic medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the supernovae heating of intergalactic medium will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-473408

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.