Avila-Reeser, Vladimir

Calette, A. R.

Hernandez-Toledo, Hector

Papastergis, Emmanouil

Rodriguez-Puebla, Aldo

English

We compile and homogenize local galaxy samples with available information on morphology, and stellar, HI and/or H-2 masses. After taking into account non gas detections, we determine the HI- and H-2-to-stellar mass relations and their 1 sigma scatter for late- and early-type galaxies. These relations are fitted to single or double power laws. Late-type galaxies are significantly gas richer than early-type ones, especially at high masses. The H-2-to-HI mass ratios as a function of M-* are discussed. We constrain the distribution functions of the HI- and H-2-to-stellar mass ratios. We find that they can be described by a Schechter function for late types and a (broken) Schechter + uniform function for early types. Using the observed galaxy stellar mass function and the volume-complete late-to-early-type galaxy ratio as a function of M-*, these distributions are mapped into HI and H-2 mass functions. The mass functions are consistent with those inferred from large surveys. The results presented here can be used to constrain models and simulations of galaxy evolution.</p

Dissertations of the University of Groningen

The HI- and H2-to-Stellar Mass Correlations of Late- and Early-Type Galaxies and their Consistency with the Observational Mass Functions

https://pure.rug.nl/ws/files/93744952/RMxAA..54_2_acalette_XV.pdf

The HI- and H2-to-Stellar Mass Correlations of Late- and Early-Type Galaxies and their Consistency with the Observational Mass Functions

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Dissertations of the University of Groningen