The Astrophysical Journal · 1979 · 176 citations · 0 references
Natural SciencesAstronomyPhysicsAstrophysicsExtragalactic AstronomyInfrared AstronomyExtragalactic Distance ScaleExtragalactic Infrared AstronomyGalactic ExtinctionGalaxy ClustersInfrared PhotometryCosmic Distance ScaleFar-infrared Astronomy Of GalaxiesGalaxy Cluster DistancesGalaxy Infrared LuminosityInfrared Luminosity FunctionsInfrared Photometry Of GalaxiesPhotometryRedshift-distance Relation
The infrared luminosity/H I velocity‑width relation is a fundamental tool for estimating extragalactic distances. The study investigates the Tully‑Fisher relation using infrared H magnitudes for galaxies in Virgo and Ursa Major and applies the relation to determine cluster distances. The authors measured H‑band photometry and H I profile widths for 29 spiral galaxies, then used the infrared Tully‑Fisher relation to estimate distances. The infrared Tully‑Fisher relation shows reduced scatter due to extinction, follows a L∝v⁴ power law, yields Virgo and Ursa Major distance moduli of ~31.07 and 31.06, and implies a Hubble constant of 61±4 km s⁻¹ Mpc⁻¹. Published in The Astrophysical Journal, April 1979 (DOI 10.1086/156923).
view Abstract Citations (294) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The infrared luminosity/H I velocity-width relation and its application to the distance scale. Aaronson, M. ; Huchra, J. ; Mould, J. Abstract The Tully-Fisher (1977) relation between absolute blue magnitudes and H I profile widths of galaxies is investigated on the basis of IR photometry (particularly H magnitudes) for 11 spiral galaxies in Virgo and 18 in the Ursa Major cluster. The results confirm the hypothesis that extinction is a major source of scatter in the Tully-Fisher relation. A tighter empirical correlation is discovered in the two clusters by using H magnitudes uncorrected for inclination. The true form of the relationship is found to be a power law whereby luminosity is proportional to the fourth power of rotation velocity. The IR relation is applied to the distance scale, and preliminary results are obtained. These include respective distance moduli of about 31.07 and 31.06 for the Virgo and Ursa Major clusters as well as a Hubble constant of 61 + or - 4 km/s per Mpc. Publication: The Astrophysical Journal Pub Date: April 1979 DOI: 10.1086/156923 Bibcode: 1979ApJ...229....1A Keywords: Cosmology; Galactic Clusters; H Lines; Infrared Astronomy; Luminous Intensity; Spectral Line Width; Astronomical Photometry; Data Reduction; Radio Sources (Astronomy); Virgo Galactic Cluster; Astrophysics; Clusters of Galaxies:Distances; Hubble Constant; Infrared Photometry:Late-Type Galaxies full text sources ADS | data products NED (32) SIMBAD (29)