1998A&A...339..409M


Query : 1998A&A...339..409M

1998A&A...339..409M - Astronomy and Astrophysics, volume 339, 409-422 (1998/11-2)

Near-infrared surface photometry of early-type spiral galaxies. II. M/L ratios and dark halos.

MORIONDO G., GIOVANARDI C. and HUNT L.K.

Abstract (from CDS):

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. The value of the MOND acceleration parameter that best accommodates the sample as a whole is 1.3x10–8cm/s2.

Abstract Copyright:

Journal keyword(s): galaxies: fundamental parameters - galaxies: kinematics and dynamics - galaxies: spiral - galaxies: stellar content - galaxies: structure

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 1024 IG 02 39 11.9648991216 +10 50 48.592390416   13.8       ~ 91 0
2 NGC 2639 Sy2 08 43 38.0682469032 +50 12 19.942091604 12.90 12.56 11.65     ~ 399 2
3 NGC 2775 G 09 10 20.1334093488 +07 02 16.874157048   11.417 10.481 9.920 8.994 ~ 340 0
4 NGC 2841 LIN 09 22 02.6778711696 +50 58 35.737082868 10.43 10.09 9.22     ~ 1024 1
5 NGC 3593 GiG 11 14 36.9731893800 +12 49 05.497790664   11.8       ~ 340 2
6 IC 724 LIN 11 43 34.6616088960 +08 56 32.835152400   13.8       ~ 76 0
7 NGC 3898 LIN 11 49 15.370 +56 05 03.66   11.7       ~ 284 1
8 NGC 4378 Sy2 12 25 18.1024266072 +04 55 30.485595360   14.51 13.49     ~ 228 0
9 NGC 4419 LIN 12 26 56.4505296720 +15 02 50.688833388 12.42 12.08 11.16     ~ 380 2
10 NGC 4450 LIN 12 28 29.5910654016 +17 05 05.976112020   10.90 10.08     ~ 532 2
11 NGC 4698 Sy2 12 48 22.9082830584 +08 29 14.667552276   13.24 12.27     ~ 461 0
12 NGC 4845 AGN 12 58 01.242 +01 34 32.09   17.40 16.31     ~ 224 0
13 NGC 5879 AGN 15 09 46.7271710112 +57 00 00.538947900   11.9       ~ 237 1
14 NGC 6314 LIN 17 12 38.6880420672 +23 16 12.229407012 16.04 15.56 14.62 14.02 13.33 ~ 94 0

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2022.05.22-12:30:47

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