2014A&A...561A.131S


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.19CEST15:49:37

2014A&A...561A.131S - Astronomy and Astrophysics, volume 561A, 131-131 (2014/1-1)

Unifying static analysis of gravitational structures with a scale-dependent scalar field gravity as an alternative to dark matter.

SALZANO V., MOTA D.F., CAPOZZIELLO S. and NAPOLITANO N.R.

Abstract (from CDS):

We investigated the gravitational effects of a scalar field within scalar-tensor gravity as an alternative to dark matter. Motivated by chameleon, symmetron, and f(R)-gravity models, we studied a phenomenological scenario where the scalar field has both a mass (i.e. interaction length) and a coupling constant to the ordinary matter that scale with the local properties of the considered astrophysical system. We analysed the feasibility of this scenario using the modified gravitational potential obtained in its context and applied it to the galactic and hot gas/stellar dynamics in galaxy clusters and elliptical/spiral galaxies respectively. This is intended to be a first step in assessing the viability of this new approach in the context of ``alternative gravity'' models. The main results are 1. the velocity dispersion of elliptical galaxies can be fitted remarkably well by the suggested scalar field, with model significance similar to a classical Navarro-Frenk-White dark halo profile; 2. the analysis of the stellar dynamics and the gas equilibrium in elliptical galaxies has shown that the scalar field can couple with ordinary matter with different strengths (different coupling constants), producing and/or depending on the different clustering state of matter components; 3. elliptical and spiral galaxies, combined with clusters of galaxies, show evident correlations among theory parameters, which suggest both the general validity of our results on all scales and a way toward a possible unification of the theory for all types of the gravitational systems we considered. All these results demonstrate that the proposed scalar field scenario can work fairly well as an alternative to dark matter.

Abstract Copyright:

Journal keyword(s): dark matter - galaxies: elliptical and lenticular, cD - galaxies: clusters: intracluster medium - galaxies: spiral - gravitation

CDS comments: RX J1159 not identified (incomplete format).

Simbad objects: 31

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Number of rows : 31

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 ACO 133 ClG 01 02 39.0 -21 57 15           ~ 325 1
2 UGC 1230 LSB 01 45 32.251 +25 31 17.28   17       ~ 74 0
3 UGC 1281 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 133 0
4 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 645 1
5 ACO 383 ClG 02 48 06.9 -03 29 32           ~ 290 0
6 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 461 0
7 UGC 3137 G 04 46 16.976 +76 25 08.04   15.5       ~ 63 0
8 UGC 3371 G 05 56 35.98 +75 19 01.9   17       ~ 77 0
9 NGC 2366 H2G 07 28 51.85 +69 12 31.1 12.25 11.86 11.39 11.33   ~ 687 0
10 UGC 4173 G 08 07 10.05 +80 07 36.5   15.7       ~ 47 0
11 IC 2233 LSB 08 13 58.909 +45 44 31.74 12.87 13.41 12.63 12.80   ~ 188 1
12 NGC 2552 G 08 19 20.5356353358 +50 00 34.586263623 13.44 13.00 12.56     ~ 219 1
13 ACO 907 ClG 09 58 21.84 -11 03 47.5           ~ 111 0
14 NGC 3274 EmG 10 32 17.2228402368 +27 40 07.160374345   13.30   12.77   ~ 192 0
15 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 716 1
16 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1363 0
17 ACO 1413 ClG 11 55 18.0 +23 24 19           ~ 374 0
18 NAME NGC 4073 Group GrG 12 04 21.7 +01 50 19     13.53     ~ 241 0
19 NGC 4170 LSB 12 12 20.5798868802 +29 12 36.988440835   13.73 13.34 12.81   ~ 81 0
20 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1609 2
21 NGC 4395 Sy2 12 25 48.8639154223 +33 32 48.694684028 10.84 10.54 10.11 9.98   ~ 953 1
22 NGC 4455 EmG 12 28 44.1266093618 +22 49 13.542101138   15.5       ~ 165 0
23 NGC 4494 GiP 12 31 24.034 +25 46 29.93   10.55 9.74     ~ 444 0
24 NGC 5023 EmG 13 12 11.799 +44 02 16.88   13.2       ~ 209 0
25 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1134 0
26 UGC 8837 G 13 54 45.602 +53 54 20.06   14.2       ~ 173 0
27 UGC 9211 G 14 22 32.1695540157 +45 23 01.929995337   15.7       ~ 67 0
28 ACO 1991 ClG 14 54 30.2 +18 37 51           ~ 300 1
29 ACO 2029 ClG 15 10 58.7 +05 45 42           ~ 835 0
30 UGC 10310 IG 16 16 17.9040378078 +47 02 43.158504118   14.9       ~ 118 0
31 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 613 2

    Equat.    Gal    SGal    Ecl

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2019.10.19-15:49:37

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