4 papers · 1 filter
H-delta in the Integrated Light of Galaxies: What Are We Actually Measuring?
L. C. Prochaska, J. A. Rose, N. Caldwell +5
We present a cautionary study exploring the reliability of the H-delta line in the integrated spectra of galaxies for determining galaxy ages. Our database consists of the observed…
Population Synthesis in the Blue III. The Integrated Spectrum of M67 and the Spectroscopic Age of M32
Ricardo P. Schiavon, Nelson Caldwell, James A. Rose
We construct an integrated spectrum of the intermediate age, solar metallicity Galactic cluster M67, from individual spectra of cluster members. The integrated spectrum is used as…
47 Tuc: The Spectroscopic Versus CMD Age Discrepancy
Alexandre Vazdekis, Maurizio Salaris, Nobuo Arimoto +1
We investigate current problems in obtaining reliable ages for old stellar systems based on stellar population synthesis modelling of their integrated spectra. In particular, we ad…
UV Spectra, Line Indices of M31 Globular Clusters and E Galaxy Cores
J. M. Ponder, D. Burstein, R. W. O'Connell +6
Observations in integrated light (2200-4800 A, 8 to 11 A resolution, S/N > 20) of 4 M31 globular clusters and of the cores of six gE galaxies made with the HST/FOS are presented an…