2001MNRAS.323..453H

Query : 2001MNRAS.323..453H

2001MNRAS.323..453H - Mon. Not. R. Astron. Soc., 323, 453-459 (2001/May-2)

On the apparent coupling of neutral hydrogen and dark matter in spiral galaxies.

HOEKSTRA H., VAN ALBADA T.S. and SANCISI R.

Abstract (from CDS):

We have studied a mass model for spiral galaxies in which the dark matter surface density is a scaled version of the observed Hi surface density. Applying this mass model to a sample of 24 spiral galaxies with reliable rotation curves, one obtains good fits for most galaxies. The scaling factors cluster around 7, after correction for the presence of primordial helium. For several cases, however, different, often larger, values are found. For galaxies that cannot be fitted well, the discrepancy occurs at large radii and results from a fairly rapid decline of the Hi surface density in the outermost regions. Because of such imperfections and in view of possible selection effects, it is not possible to conclude here that there is a real coupling between Hi and dark matter in spiral galaxies.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): methods: analytical - galaxies: haloes - galaxies: kinematics and dynamics - galaxies: spiral - cosmology: theory - dark matter

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 55 rG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 828 2
2 NGC 247 LSB 00 47 08.554 -20 45 37.44 10.11 9.61 9.10 8.87   ~ 480 2
3 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1614 2
4 NGC 801 AGN 02 03 44.7926518608 +38 15 31.615649064   14.23 13.47     ~ 186 0
5 NGC 1003 GiG 02 39 16.893 +40 52 20.25   12.1   10.83   ~ 198 0
6 Z 524-20 GiP 02 47 55.4194406880 +37 32 18.528735876   14.3   12.8   ~ 131 0
7 Z 415-12 AG? 02 48 34.593 +06 31 20.72   15.30       ~ 49 0
8 NGC 1560 GiG 04 32 49.087 +71 52 59.20   12.1       ~ 264 0
9 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1887 1
10 NGC 2841 LIN 09 22 02.6778711696 +50 58 35.737082868 10.43 10.09 9.22     ~ 1113 1
11 NGC 2903 AGN 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 1204 3
12 NGC 2998 LIN 09 48 43.6305155160 +44 04 53.217027660   13.3       ~ 231 0
13 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 825 2
14 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 946 1
15 NGC 4789A GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 614 1
16 NGC 5033 Sy2 13 13 27.535 +36 35 37.14   11.01 12.03 9.73   ~ 909 1
17 Z 245-36 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 297 0
18 MCG+04-31-016 GiC 13 15 53.77848 +25 26 10.1328   17       ~ 124 0
19 NGC 5390 LIN 13 55 39.9385716624 +40 27 42.380606592   12.81 11.93 10.04   ~ 373 1
20 NGC 5533 Sy2 14 16 07.7507477232 +35 20 37.879981584   13.0       ~ 189 0
21 NGC 5585 GiG 14 19 48.204 +56 43 44.58   11.73 11.216 11.12 10.123 ~ 455 0
22 NGC 6503 LIN 17 49 26.4207792072 +70 08 39.604132176 11.56 10.95 10.28 9.92   ~ 551 1
23 NGC 6674 AG? 18 38 33.889 +25 22 30.39   13.7       ~ 119 0
24 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
25 NGC 7331 LIN 22 37 04.0506038088 +34 24 56.800076508 10.65 10.35 9.48     ~ 1284 2

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