2011A&A...527A..76G


C.D.S. - SIMBAD4 rel 1.7 - 2019.07.18CEST03:48:49

2011A&A...527A..76G - Astronomy and Astrophysics, volume 527A, 76-76 (2011/3-1)

THINGS about MOND.

GENTILE G., FAMAEY B. and DE BLOK W.J.G.

Abstract (from CDS):

We present an analysis of 12 high-resolution galactic rotation curves from The HI Nearby Galaxy Survey (THINGS) in the context of modified Newtonian dynamics (MOND). These rotation curves were selected to be the most reliable for mass modelling, and they are the highest quality rotation curves currently available for a sample of galaxies spanning a wide range of luminosities. We fit the rotation curves with the ``simple'' and ``standard'' interpolating functions of MOND, and we find that the ``simple'' function yields better results. We also redetermine the value of a0, and find a median value very close to the one determined in previous studies, a0=(1.22±0.33)x10–8cm/s2. Leaving the distance as a free parameter within the uncertainty of its best independently determined value leads to excellent quality fits for 75% of the sample. Among the three exceptions, two are also known to give relatively poor fits in Newtonian dynamics plus dark matter. The remaining case (NGC 3198) presents some tension between the observations and the MOND fit, which might, however, be explained by the presence of non-circular motions, by a small distance, or by a value of a0 at the lower end of our best-fit interval, 0.9x10–8cm/s2. The best-fit stellar M/L ratios are generally in remarkable agreement with the predictions of stellar population synthesis models. We also show that the narrow range of gravitational accelerations found to be generated by dark matter in galaxies is consistent with the narrow range of additional gravity predicted by MOND.

Abstract Copyright:

Journal keyword(s): galaxies: kinematics and dynamics - dark matter - galaxies: spiral - gravitation

Simbad objects: 18

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Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 675 1
2 NGC 2366 H2G 07 28 51.85 +69 12 31.1 12.25 11.86 11.39 11.33   ~ 685 0
3 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1561 1
4 NGC 2841 LIN 09 22 02.655 +50 58 35.32 10.43 10.09 9.22     ~ 956 1
5 NGC 2905 H2G 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 960 3
6 NGC 2976 GiP 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 563 1
7 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 3869 5
8 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 791 1
9 IC 2574 G 10 28 23.6204574649 +68 24 43.441365350 11.70 11.07 10.87 10.74   ~ 587 1
10 NGC 3521 LSB 11 05 48.5676206040 -00 02 09.228156576 10.06 9.83 9.02 10.1 9.6 ~ 665 2
11 NGC 3621 AGN 11 18 16.300 -32 48 45.36 10.10 9.44 9.56 8.07 10.1 ~ 472 3
12 M 94 SyG 12 50 53.148 +41 07 12.55 9.15 8.96 8.24 7.78   ~ 1170 3
13 UGC 8024 GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 515 1
14 M 63 LIN 13 15 49.2738527699 +42 01 45.726078017   9.34 8.59 8.35   ~ 1016 2
15 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 369 0
16 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2164 2
17 NGC 7331 LIN 22 37 04.102 +34 24 57.31 10.65 10.35 9.48     ~ 1076 2
18 NGC 7793 GiG 23 57 49.7533807411 -32 35 27.708304655 10.26 9.74 9.28 9.06 9.7 ~ 884 2

    Equat.    Gal    SGal    Ecl

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2019.07.18-03:48:49

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