2021AJ....161..205K

Query : 2021AJ....161..205K

2021AJ....161..205K - Astron. J., 161, 205-205 (2021/April-0)

Distance and mass of the NGC 253 galaxy group.

KARACHENTSEV I.D., TULLY R.B., ANAND G.S., RIZZI L. and SHAYA E.J.

Abstract (from CDS):

Two dwarf galaxies, WOC2017-07 and PGC 704814, located in the vicinity of the nearby luminous spiral galaxy NGC 253 were observed with the Advanced Camera for Surveys on the Hubble Space Telescope. Their distances of 3.62 ± 0.18 Mpc and 3.66 ± 0.18 Mpc were derived using the tip of the red giant branch method. These distances are consistent with the dwarf galaxies being members of the NGC 253 group. Based on the radial velocities and projected separations of seven assumed dwarf companions, we estimated the total mass of NGC 253 to be (8.1 ± 2.6)1011M☉, giving a total-mass-to-K-luminosity ratio of Morb/LK = (8.5 ± 2.7)M☉/L☉. A notable property of NGC 253 is its declined rotation curve. NGC 253 joins four other luminous spiral galaxies in the Local Volume with declined rotation curves (NGC 2683, NGC 2903, NGC 3521, and NGC 5055) that together have the low average total-mass-to-luminosity ratio, Morb/LK = (5.5 ± 1.1)M☉/L☉. This value is only ∼1/5 of the corresponding ratio for the Milky Way and M31.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy distances - Galaxy groups - Dwarf galaxies - Hertzsprung Russell diagram

Simbad objects: 35

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Number of rows : 35
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 ESO 349-31 AG? 00 08 13.1536 -34 34 47.836   15.54   14.99   ~ 156 3
2 NGC 24 EmG 00 09 56.542 -24 57 47.27 12.12 12.20 11.58 11.46 11.5 ~ 269 1
3 NGC 45 Sy2 00 14 04.0072128696 -23 10 55.132646808 11.92 11.21 10.73 10.58 10.4 ~ 269 1
4 NGC 55 rG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 828 2
5 NGC 59 EmG 00 15 25.126 -21 26 39.68 14.01 13.21 12.59 12.31   ~ 111 0
6 NAME Sculptor dE1 GiG 00 23 51.7 -24 42 18   17.73       ~ 71 1
7 GALEXASC J003351.79-275024.4 LSB 00 33 51.79 -27 50 24.4           ~ 10 0
8 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
9 IC 1574 AG? 00 43 03.82 -22 14 48.8 15.25 14.73 14.35 14.24 14.2 ~ 137 1
10 NGC 247 LSB 00 47 08.554 -20 45 37.44 10.11 9.61 9.10 8.87   ~ 480 2
11 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
12 [SCS2014] SCl-MM-Dw1 G 00 47 34.93 -26 23 19.7           ~ 14 0
13 ESO 540-30 AG? 00 49 20.96 -18 04 31.5   16.45   15.33   ~ 92 1
14 MCG-04-03-019 G 00 49 49.3 -21 00 58 16.11 15.64 15.36 14.8 15.5 ~ 144 1
15 NAME NGC 253-dw2 G 00 50 17.060 -24 44 58.58           ~ 21 0
16 ESO 540-32 LSB 00 50 24.5 -19 54 23 17.44 16.54 16.01 15.70   ~ 79 1
17 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1614 2
18 GALEXASC J005501.01-231008.9 G 00 55 00.9 -23 10 07           ~ 8 0
19 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 526 0
20 NGC 625 AGN 01 35 04.632 -41 26 10.32 12.37 11.78 11.25 11.03 11.5 ~ 312 2
21 M 74 G 01 36 41.7451236624 +15 47 01.107512304 10.52 10.00 9.46 9.16   ~ 1934 1
22 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
23 IC 342 AGN 03 46 48.514 +68 05 45.98   10.5       ~ 1579 1
24 NGC 2683 AGN 08 52 41.3064829584 +33 25 18.597681516 11.57 10.68 9.79 9.38   ~ 475 1
25 NGC 2903 AGN 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 1204 3
26 NGC 3180 GiG 10 18 16.985 +41 25 27.77   10.4       ~ 777 0
27 NGC 3521 EmG 11 05 48.5680991376 -00 02 09.245076540 10.06 9.83 9.02 10.1 9.6 ~ 879 2
28 NAME Local Supercluster SCG 12 31 +12.4           ~ 566 0
29 M 63 LIN 13 15 49.2741893928 +42 01 45.728076108   9.34 8.59 8.35   ~ 1292 2
30 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
31 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
32 MCG-05-56-001 G 23 43 45.549 -31 57 24.37 14.55 14.03 13.73 13.63   ~ 162 1
33 NGC 7793 GiG 23 57 49.7540045856 -32 35 27.701550744 10.26 9.74 9.28 9.06 9.7 ~ 1188 2
34 LEDA 704814 AG? 23 58 40.70 -31 28 03.4   16.666   16.360   ~ 9 0
35 NAME Local Group GrG ~ ~           ~ 9325 0

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