The 12CO(1-0) to H2 Conversion Factor in Normal Late-Type Galaxies

Details The 12CO(1-0) to H2 Conversion Factor in Normal Late-Type Galaxies The 12CO(1-0) to H2 Conversion Factor in Normal Late-Type Galaxies

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.460..357b&link_type=abstract

The Promise of the Herschel Space Observatory. Eds. G.L. Pilbratt, J. Cernicharo, A.M. Heras, T. Prusti, & R. Harris. ESA-SP 460

Mathematics

Logic

1

Galaxies: Ism, Stars: Formation, Missions: First

Scientific paper

The molecular gas mass in nearby galaxies is generally estimated using 12CO(1-0) line intensities and assuming the X conversion factor between I(CO) and N(H2) measured in the solar neighborhood. It is however known that this X conversion factor is not universal since it changes with metallicity, cosmic ray density and UV radiation field. Far-IR data in the spectral range 100-1000 microns can be used to estimate the molecular gas content of late-type galaxies in an independent way of CO line measurements once a constant dust to gas ratio is assumed, allowing a direct estimate of X. This exercise is presented here for a large sample of galaxies with available multifrequency data using ISOPHOT and IRAS far-IR data. This analysis, which is extremely useful to study the properties of the ISM of galaxies spanning a large range in luminosity and morphological type, is however limited by the lack of photometric data in the range 100 microns <= lambda <= 1000 microns, the spectral domain observed by FIRST.

Affiliated with

Also associated with

No associations

Rating

The 12CO(1-0) to H2 Conversion Factor in Normal Late-Type 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 The 12CO(1-0) to H2 Conversion Factor in Normal Late-Type Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 12CO(1-0) to H2 Conversion Factor in Normal Late-Type Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1199543