Photometric studies of composite stellar systems. I - CO and JHK observations of E and S0 galaxies

Abstract

view Abstract Citations (687) References (51) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Photometric studies of composite stellar systems. I. CO and JHK observations of E and S0 galaxies. Frogel, J. A. ; Persson, S. E. ; Aaronson, M. ; Matthews, K. Abstract Multiaperture infrared photometric observations of the central regions of 51 early-type galaxies and of the integrated light of five globular clusters are presented. These data are compared with selected optical observations and with various model predictions. The main results of the work are: (1) the observed parameters for the brighter galaxies, particularly the CO index and the V-K color, agree with the predictions of stellar synthesis models characterized by giant-dominated populations with mass/visual luminosity ratios less than 10; (2) the galaxian broad-band colors tend to redden with increasing luminosity and decreasing aperture size; (3) for the globular clusters, there is evidence that the integrated colors become redder with increasing metallicity; and (4) in bright galaxies the relative changes of U-V, V-J, and J-K as functions of radius may differ from the relative changes as functions of luminosity at a fixed radius. Publication: The Astrophysical Journal Pub Date: February 1978 DOI: 10.1086/155883 Bibcode: 1978ApJ...220...75F Keywords: Elliptical Galaxies; Galaxies; Globular Clusters; Infrared Spectrophotometers; Stellar Models; Stellar Systems; Brightness; Broadband; Carbon Monoxide; Data Reduction; Infrared Radiation; Red Giant Stars; Astronomy; Galaxies:Photometry; Globular Clusters:Photometry full text sources ADS | data products NED (51) SIMBAD (46) GCPD (1) Related Materials (4) Part 2: 1978ApJ...220..442A Part 3: 1979ApJS...39...61P Part 4: 1980ApJ...240..785F Part 5: 1983ApJ...266..105P