2012A&A...540A..49M

Query : 2012A&A...540A..49M

2012A&A...540A..49M - Astronomy and Astrophysics, volume 540A49-49 (2012/4-1)

Fundamentals of the dwarf fundamental plane.

McCALL M.L., VADUVESCU O., POZO NUNEZ F., BARR DOMINGUEZ A., FINGERHUT R., UNDA-SANZANA E., LI B. and ALBRECHT M.

Abstract (from CDS):

Star-forming dwarfs are studied to elucidate the physical underpinnings of their fundamental plane. Processes controlling dynamics are evaluated, connections between quiescent and bursting dwarfs are examined, and the viability of using structural properties of dwarfs to determine distances is assessed. Deep surface photometry in Ks is presented for 19 star-forming dwarfs. The data are amalgamated with previously published observations to create a sample of 66 galaxies suitable for exploring how global properties and kinematics are connected. It is confirmed that residuals in the Tully-Fisher relation are correlated with surface brightness, but that even after accomodating the surface brightness dependence through the dwarf fundamental plane, residuals in absolute magnitude are far larger than expected from observational errors. Rather, a more fundamental plane is identified which connects the potential to HI line width and surface brightness. Residuals correlate with the axis ratio in a way which can be accommodated by recognizing the galaxies to be oblate spheroids viewed at varying angles. Correction of surface brightnesses to face-on leads to a correlation among the potential, line width, and surface brightness for which residuals are entirely attributable to observational uncertainties. The mean mass-to-light ratio of the diffuse component of the galaxies is constrained to be 0.88±0.20 in Ks. Blue compact dwarfs lie in the same plane as dwarf irregulars. The dependence of the potential on line width is less strong than expected for virialized systems, but this may be because surface brightness is acting as a proxy for variations in the mass-to-light ratio from galaxy to galaxy. Altogether, the observations suggest that gas motions are predominantly disordered and isotropic, that they are a consequence of gravity, not turbulence, and that the mass and scale of dark matter haloes scale with the amount and distribution of luminous matter. The tight relationship between the potential and observables offers the promise of determining distances to unresolved star-forming dwarfs to an accuracy comparable to that provided by the Tully-Fisher relation for spirals.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: fundamental parameters - galaxies: kinematics and dynamics - galaxies: structure - infrared: galaxies - dark matter

Simbad objects: 86

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Number of rows : 86
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 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 ESO 349-31 AG? 00 08 13.1536 -34 34 47.836   15.54   14.99   ~ 156 3
3 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
4 ESO 294-10 AG? 00 26 33.37 -41 51 19.1   15.76 15.3 14.97   ~ 122 2
5 IC 1574 AG? 00 43 03.82 -22 14 48.8 15.25 14.73 14.35 14.24 14.2 ~ 137 1
6 ESO 540-30 AG? 00 49 20.96 -18 04 31.5   16.45   15.33   ~ 92 1
7 MCG-04-03-019 G 00 49 49.3 -21 00 58 16.11 15.64 15.36 14.8 15.5 ~ 144 1
8 Z 458-20 AG? 01 07 23.0321 +16 41 00.988 15.01 14.55 14.07     ~ 148 0
9 MCG-07-04-032 AG? 01 45 03.74 -43 35 52.9 13.45 12.92 12.63 12.51 12.8 ~ 152 1
10 LEDA 166065 LSB 02 00 10.2 +28 49 53   17.2       ~ 67 0
11 UGC 1703 LSB 02 12 55.14 +32 48 48.9   18       ~ 28 0
12 NGC 1311 Sy2 03 20 06.946 -52 11 07.76 13.89 13.35 12.93 12.75 13.1 ~ 136 0
13 UGC 2684 AG? 03 20 23.71 +17 17 45.1   18       ~ 78 0
14 NGC 1569 rG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1297 3
15 UGCA 92 AG? 04 32 03.8366 +63 36 51.243   16.15       ~ 128 0
16 NGC 1560 GiG 04 32 49.087 +71 52 59.20   12.1       ~ 264 0
17 NAME Cam B G 04 53 07.1 +67 05 57   16.71       ~ 79 0
18 ESO 121-20 AG? 06 15 54.19 -57 43 31.7   15.85   15.49 15.6 ~ 63 1
19 Z 57-6 AG? 07 13 51.60 +10 31 19.0   14.9       ~ 105 0
20 ESO 59-1 AG? 07 31 18.20 -68 11 16.8   13.74   12.80 13.7 ~ 81 1
21 Z 87-30 G 07 41 56.3059298112 +16 48 07.451632188   15.4       ~ 233 0
22 Z 87-33 AG? 07 42 31.794 +16 33 36.69   15.6       ~ 22 0
23 Z 88-7 G 07 57 01.027 +14 23 47.66   16.0       ~ 161 0
24 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
25 Z 331-51 GiG 08 37 03.00 +69 46 31.0 15.70 15.46 14.98 14.89   ~ 316 0
26 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 371 2
27 Z 36-12 H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 569 0
28 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 808 0
29 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 221 1
30 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
31 ESO 215-9 AG? 10 57 29.90 -48 10 43.0   16.03   15.02 15.0 ~ 79 0
32 Z 351-62 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 346 1
33 Z 242-46 bCG 11 33 29.12 +49 14 17.4 14.69 14.61 14.25 14.17   ~ 242 1
34 NGC 3738 AGN 11 35 48.982 +54 31 24.70   12.12 12.04 11.56   ~ 303 0
35 ESO 320-14 AG? 11 37 53.24 -39 13 13.2   15.85   15.17 16.0 ~ 48 0
36 Z 214-32 AG? 11 50 52.98254 +38 52 50.6594   13.72 13.9 13.39   ~ 175 0
37 ESO 379-7 AG? 11 54 43.49 -33 33 36.0   16.60   15.50 15.3 ~ 61 0
38 NGC 4163 LSB 12 12 09.34 +36 10 08.1 14.33 13.70 13.2 12.98   ~ 238 0
39 ESO 321-14 AG? 12 13 48.8792 -38 14 00.250 16.32 15.70 15.35 15.20 15.2 ~ 92 0
40 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 1017 1
41 IC 3104 AG? 12 18 46.06 -79 43 33.9   13.65 12.8 12.04   ~ 93 1
42 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2512 4
43 Z 187-47 GiG 12 28 38.743 +35 43 02.91 15.50 15.12 14.86 14.78   ~ 130 1
44 ESO 381-18 EmG 12 44 42.39 -35 58 00.2   15.79   14.84 15.1 ~ 59 0
45 MCG-06-28-017 AG? 12 46 00.67 -33 50 13.0   14.24   13.50 14.0 ~ 91 0
46 ESO 443-9 AG? 12 54 53.3144 -28 20 21.770   17.01   16.35   ~ 42 0
47 Z 71-87 H2G 12 58 40.1930636208 +14 13 00.739589628 15.24 15.16 14.98 14.81   ~ 475 0
48 LEDA 166152 AG? 13 05 02.8154 -40 04 58.706   16.0   16.2 16.0 ~ 64 0
49 ESO 269-58 AG? 13 10 32.8047 -46 59 37.747   12.50   11.31   ~ 76 0
50 MCG+08-24-090 AG? 13 13 22.839 +46 19 21.71   17       ~ 135 1
51 Z 245-36 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 297 0
52 LEDA 166163 G 13 21 08.5 -31 31 50   17.4       ~ 59 0
53 LEDA 46885 GiC 13 24 36.23 -30 58 18.5   16.67   17.33   ~ 61 1
54 IC 4247 EmG 13 26 44.43 -30 21 44.7 15.34 14.67 14.28 14.13 14.53 ~ 99 0
55 ESO 324-24 LSB 13 27 37.6117 -41 28 44.128   12.91   12.13 12.3 ~ 107 0
56 Z 271-48 EmG 13 30 44.8682655624 +54 54 38.522749824 14.72 14.25 13.90 13.75   ~ 218 0
57 ESO 444-78 GiC 13 36 30.7829 -29 14 10.181   15.49   14.81 15.0 ~ 97 0
58 ESO 444-84 GiC 13 37 19.99 -28 02 42.0 16.04 15.34 15.05 15.05 14.9 ~ 133 1
59 LEDA 592761 G 13 37 25.2 -39 53 52   16.1   16.3 16.5 ~ 47 0
60 Z 218-34 AG? 13 39 53.75 +40 44 25.3 15.37 14.56 14.20 14.10   ~ 165 0
61 IC 4316 EmG 13 40 18.41 -28 53 32.0   15.02 15.93 14.15   ~ 89 0
62 ESO 325-11 AG? 13 45 01.0528 -41 51 45.993   14.02   13.49 12.9 ~ 113 0
63 LEDA 4614882 AG? 13 48 33.9801 -37 58 03.811           ~ 37 0
64 LEDA 3097113 G 13 51 18.9 -46 58 25           ~ 36 0
65 LEDA 2807150 LSB 13 54 33.356 +04 14 39.66   16.8 17.1     ~ 89 0
66 MCG+06-31-023 AG? 13 54 48.8114 +35 50 07.775   16.5   15.20   ~ 123 1
67 ESO 384-16 AG? 13 57 01.37 -35 19 58.7   14.80   14.10 14.81 ~ 62 0
68 NGC 5408 EmG 14 03 20.907 -41 22 39.75   12.59   11.96 12.2 ~ 368 3
69 LEDA 166185 G 14 07 10.1 +35 03 37   16.9 17.2     ~ 94 0
70 Z 133-19 AG? 14 15 57.0834 +23 03 29.871 15.40 14.77 14.41 14.32   ~ 296 0
71 Z 247-26 AG? 14 24 43.21 +44 31 41.8 14.24 13.54 13.17 13.07   ~ 217 0
72 LEDA 51659 G 14 28 03.7 -46 18 06   15       ~ 73 1
73 ESO 223-9 AG? 15 01 08.67 -48 17 25.7   12.3   12.5 12.6 ~ 81 0
74 ESO 137-18 GiG 16 20 58.352 -60 29 27.48   12.23   11.03 11.9 ~ 74 0
75 IC 4662 bCG 17 47 09.192 -64 38 19.25   11.75 11.1 10.45   ~ 253 4
76 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
77 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 323 1
78 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
79 ESO 461-36 G 20 03 57.4 -31 40 53   17.06   16.2 16.1 ~ 73 1
80 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
81 IC 5152 rG 22 02 41.521 -51 17 47.20   11.03 10.9 10.19   ~ 273 1
82 ESO 468-20 G 22 40 43.6 -30 47 55   15.88   15.13   ~ 45 0
83 MCG-05-55-012 G 23 26 27.52 -32 23 19.5 15.34 14.71 14.23 14.03   ~ 163 0
84 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
85 LEDA 2807157 GiG 23 45 35.177 +38 43 05.09   16.7 15.2     ~ 93 1
86 ESO 149-3 AG? 23 52 02.15 -52 34 33.9 15.48 15.10 14.89 14.84 14.9 ~ 88 0

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