Abstract
We have obtained 21 cm profiles and CCD surface photometry for a subset of field low surface brightness (LSB) spiral galaxies found by a large survey using the Automated Plate Measuring machine. We find that the LSB spirals generally follow the same Tully-Fisher relations defined by a sample of higher surface brightness (HSB) galaxies drawn from the Ursa Major cluster, albeit with a considerably greater scatter. This general trend implies that LSB galaxies of a given total luminosity have mass-to-light ratios (M/L) similar to those of HSB galaxies of comparable total luminosity, despite their differences in luminosity density (i.e., surface brightness). We also find evidence that galaxies with extremely large half-light radii (the "Malin 1 cousins") tend to be excessively luminous for their rotation speeds. We find that, at a given profile width, the luminosity of an LSB galaxy relative to the Tully-Fisher relation seems to be weakly anticorrelated with gas richness, indicating that some of the higher scatter may be associated with the evolutionary status of the LSB galaxies. Finally, we find that the LSB galaxies tend to have higher total atomic gas masses than the Ursa Major comparison galaxies, despite the generally comparable optical luminosities between the two sets.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 72-82 |
| Number of pages | 11 |
| Journal | Astrophysical Journal |
| Volume | 438 |
| Issue number | 1 |
| State | Published - Jan 1 1995 |
Fingerprint
Keywords
- Galaxies: fundamental parameters
- Galaxies: photometry
- Galaxies: spiral
- Radio lines: galaxies
ASJC Scopus subject areas
- Space and Planetary Science
Cite this
The mass-to-light ratios of low surface brightness spiral galaxies : Clues from the tully-fisher relation. / Sprayberry, D.; Bernstein, G. M.; Impey, Christopher D; Botoun, G. D.
In: Astrophysical Journal, Vol. 438, No. 1, 01.01.1995, p. 72-82.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The mass-to-light ratios of low surface brightness spiral galaxies
T2 - Clues from the tully-fisher relation
AU - Sprayberry, D.
AU - Bernstein, G. M.
AU - Impey, Christopher D
AU - Botoun, G. D.
PY - 1995/1/1
Y1 - 1995/1/1
N2 - We have obtained 21 cm profiles and CCD surface photometry for a subset of field low surface brightness (LSB) spiral galaxies found by a large survey using the Automated Plate Measuring machine. We find that the LSB spirals generally follow the same Tully-Fisher relations defined by a sample of higher surface brightness (HSB) galaxies drawn from the Ursa Major cluster, albeit with a considerably greater scatter. This general trend implies that LSB galaxies of a given total luminosity have mass-to-light ratios (M/L) similar to those of HSB galaxies of comparable total luminosity, despite their differences in luminosity density (i.e., surface brightness). We also find evidence that galaxies with extremely large half-light radii (the "Malin 1 cousins") tend to be excessively luminous for their rotation speeds. We find that, at a given profile width, the luminosity of an LSB galaxy relative to the Tully-Fisher relation seems to be weakly anticorrelated with gas richness, indicating that some of the higher scatter may be associated with the evolutionary status of the LSB galaxies. Finally, we find that the LSB galaxies tend to have higher total atomic gas masses than the Ursa Major comparison galaxies, despite the generally comparable optical luminosities between the two sets.
AB - We have obtained 21 cm profiles and CCD surface photometry for a subset of field low surface brightness (LSB) spiral galaxies found by a large survey using the Automated Plate Measuring machine. We find that the LSB spirals generally follow the same Tully-Fisher relations defined by a sample of higher surface brightness (HSB) galaxies drawn from the Ursa Major cluster, albeit with a considerably greater scatter. This general trend implies that LSB galaxies of a given total luminosity have mass-to-light ratios (M/L) similar to those of HSB galaxies of comparable total luminosity, despite their differences in luminosity density (i.e., surface brightness). We also find evidence that galaxies with extremely large half-light radii (the "Malin 1 cousins") tend to be excessively luminous for their rotation speeds. We find that, at a given profile width, the luminosity of an LSB galaxy relative to the Tully-Fisher relation seems to be weakly anticorrelated with gas richness, indicating that some of the higher scatter may be associated with the evolutionary status of the LSB galaxies. Finally, we find that the LSB galaxies tend to have higher total atomic gas masses than the Ursa Major comparison galaxies, despite the generally comparable optical luminosities between the two sets.
KW - Galaxies: fundamental parameters
KW - Galaxies: photometry
KW - Galaxies: spiral
KW - Radio lines: galaxies
UR - http://www.scopus.com/inward/record.url?scp=11944258438&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=11944258438&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:11944258438
VL - 438
SP - 72
EP - 82
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
ER -