NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-26 T08:01:55 PDT
Help | Comment | NED Home

For refcode 2006MNRAS.367..815N:
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 2006MNRAS.367..815N GMOS spectroscopy of the S0 galaxy NGC 3115 Norris, Mark A.; Sharples, Ray M.; Kuntschner, Harald Abstract. We present Gemini Multi-Object Spectrograph longslit spectroscopy of the isolated S0 galaxy NGC 3115. We have determined kinematical data and Lick/IDS absorption line-strength indices for the major axis out to around 9 kpc and for the minor axis out to around 5 kpc (around 2R_e_). Using stellar population models which include the effects of variable [{alpha}/Fe] ratios, we derive metallicities, abundance ratios and ages for the stellar population of NGC 3115. We find that [{alpha}/Fe] remains fairly constant with increasing radius at around [{alpha}/Fe]= 0.17 for the major axis but increases rapidly for the minor axis to around [{alpha}/Fe]= 0.3. We also find that to first order, this behaviour can be explained by a simple spheroid + disc model, where the spheroid has [{alpha}/Fe]= 0.3 and the disc shows close to solar abundance ratios. The disc also appears considerably younger than the spheroid, having an age of around 6 Gyr compared to 12 Gyr for the spheroid. We compare these results to those previously presented for the globular cluster system of NGC 3115.
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

Back to NED Home