Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0807.0636)
· References in the article
· Citations to the Article (10) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (3)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
On the Baryonic, Stellar, and Luminous Scaling Relations of Disk Galaxies
Authors:
Avila-Reese, V.; Zavala, J.; Firmani, C.; Hernández-Toledo, H. M.
Affiliation:
AA(Instituto de Astronomía, Universidad Nacional Autónoma de México, A.P. 70-264, 04510 México D.F., Mexico ), AB(Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A.P. 70-543, 04510 México D.F., Mexico ; Present address: Shanghai Astronomical Observatory, Nandan Road 80, Shanghai 200030, China), AC(Instituto de Astronomía, Universidad Nacional Autónoma de México, A.P. 70-264, 04510 México D.F., Mexico ; INAF-Osservatorio Astronomico di Brera, via E. Bianchi 46, I-23807 Merate, Italy ), AD(Instituto de Astronomía, Universidad Nacional Autónoma de México, A.P. 70-264, 04510 México D.F., Mexico )
Publication:
The Astronomical Journal, Volume 136, Issue 3, pp. 1340-1360 (2008). (AJ Homepage)
Publication Date:
09/2008
Origin:
IOP
AJ Keywords:
dark matter, galaxies: evolution, galaxies: fundamental parameters, galaxies: spiral, galaxies: structure
DOI:
10.1088/0004-6256/136/3/1340
Bibliographic Code:
2008AJ....136.1340A

Abstract

We explore how the slopes and scatters of the scaling relations of disk galaxies (V m-L[-M], R-L[-M], and V m-R) change when moving from B- to K-bands and to stellar and baryonic quantities. For our compiled sample of 76 normal, non-interacting, high and low-surface brightness (SB) disk-galaxies, we find important changes, which evidence evolution effects, mainly related to the gas infall and star-formation (SF) processes. We also explore correlations among the (B - K) color, stellar mass fraction, f s, mass, M, luminosity, L, and surface density (or SB), as well as correlations among the residuals of the scaling relations, and among these residuals and those of the other relations studied here. Some of our findings are the following: (i) the scale length R bar is a third parameter in the baryonic Tully-Fisher relation (TFR) and the residuals of this relation follow a trend (slope ≈-0.15) with the residuals of the R bar-M bar relation; for the stellar and K-band cases, the scale length is no longer a third parameter and the mentioned trend disappears; (ii) among the TFRs, the B-band TFR is the most scattered; in this case, the color is a third parameter, in agreement with previous works; (iii) the low-SB (LSB) galaxies break some observed trends in diagrams that include SD, color, and f s, suggesting then a threshold in the gas SD, Σ g , below which the SF efficiency becomes independent of Σ g and of the gas infall rate. Our results are interpreted and discussed in the light of Λ Cold Dark Matter (ΛCDM)-based models of disk-galaxy formation and evolution. These models are able to explain not only the baryonic scaling correlations, but also most of the processes responsible for the observed changes in the slopes, scatters, and correlations among the residuals when changing to stellar and luminous quantities. The galaxy baryon fraction, f gal, is required to be smaller than 0.05 on average. We detect some potential difficulties for the models: the observed color-M and SD-M correlations are steeper, and the intrinsic scatter in the baryonic TFR is smaller than those predicted.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints