Radial Line Strength Gradients in M32

Details Radial Line Strength Gradients in M32 Radial Line Strength Gradients in M32

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.4906j&link_type=abstract

American Astronomical Society, 184th AAS Meeting, #49.06; Bulletin of the American Astronomical Society, Vol. 26, p.942

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present new, high resolution (2 Angstroms \ FWHM) spectroscopic data for M32. The data covers the spectral range from 3500 Angstroms-4500 Angstroms. The system of spectral indices developed by Rose (1994, A.J., 107, 206) to study variations in stellar populations between galaxies is used to look for line strength gradients in M32. We find no significant gradients out to 30," which was the useful extent of our data. A comparison is made with the recent study of Hardy et al. (1994, A.J., 107, 195). Using the Lick indices (Mg2, Hβ , Fe), centered in the red (5000 Angstroms), they detected gradients in the outer regions of the galaxy, but found the line strengths were constant with radius out to 30." A comparison is made with studies of broadband color gradients, as well. Implications for radial variations in the stellar populations are discussed.

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