NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-20 T13:13:47 PDT
Help | Comment | NED Home

For refcode 1998A&A...339..409M:
Retrieve 14 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
1998A&A...339..409M Near-infrared surface photometry of early-type spiral galaxies. II. M/L ratios and dark halos. MORIONDO G., GIOVANARDI C., HUNT L.K. Received 14 July 1997/Accepted 10 February 1998 Abstract: We present mass distributions obtained from near-infrared (NIR) surface brightness decompositions and rotation curve fitting of a sample of early-type spiral galaxies. Bulge and disk mass-to-light (M/L) ratios, dark halo parameters, and the modified Newtonian dynamics (MOND) acceleration parameter are derived. We find that the mean disk NIR M/L is higher than that of the bulge, and comparison with stellar population synthesis models implies that early-type spiral bulges are, on average, younger and more metal rich than disks. NIR disk M/L is found to depend on disk luminosity, consistently with previously reported trends in ellipticals and spirals, and with cold dark matter models for disk formation. Within the optical radius, the mean ratio of stellar to dark matter is 2 and the typical dark halo mass is 1011M{sun}. The value of the MOND acceleration parameter that best accommodates the sample as a whole is 1.3 x 10^-8^ cm s^-2^. Keywords: galaxies: fundamental parameters - galaxies: kinematics and dynamics - galaxies: spiral - galaxies: stellar content - galaxies: structure
Retrieve 14 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home