2021NatAs...5.1308G

Query : 2021NatAs...5.1308G

2021NatAs...5.1308G - Nature Astronomy, 5, 1308-1318 (2021/December-0)

Transforming gas-rich low-mass disky galaxies into ultra-diffuse galaxies by ram pressure.

GRISHIN K.A., CHILINGARIAN I.V., AFANASIEV A.V., FABRICANT D., KATKOV I.Y., MORAN S. and YAGI M.

Abstract (from CDS):

Faint extended elliptically shaped ultra-diffuse galaxies and slightly brighter and more compact dwarf elliptical and lenticular stellar systems are common in galaxy clusters. Their poorly constrained evolutionary paths can be studied by identifying young ultra-diffuse galaxy and dwarf elliptical analogues populated with bright, massive stars. Using data mining we identified 11 such low-mass (2 x 108 M☉ < M < 2 x 109 M☉) galaxies with large half-light radii (2.0 kpc < re < 5 kpc) and recently quenched star formation in the Coma and Abell 2147 galaxy clusters. All galaxies happen to have ram-pressure-stripped tails with signs of current or recent star formation. Deep spectroscopic observations revealed rotating stellar disks containing 70-95% dark matter by mass. A large fraction of the disk stars (10-60%) formed in intense star bursts 180-970 Myr ago, probably triggered by ram pressure. Observed global gradients of stellar age corroborate this scenario. Passive evolution in the next 10 Gyr will transform 9 of the 11 galaxies into ultra-diffuse galaxies. If we assume a constant rate of galaxy infall, 44 ± 16% of the most luminous present-day ultra-diffuse galaxies in Coma must have formed via ram-pressure stripping of disky progenitors.

Abstract Copyright: ©

Journal keyword(s): Astrophysics - Astrophysics of Galaxies

Simbad objects: 24

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Number of rows : 24
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 LEDA 3097693 LSB 02 41 46.80 -08 24 09.3     16.2   15.8 ~ 183 0
2 NGC 2414 OpC 07 33 10.7 -15 26 56   8.33 7.9     ~ 87 0
3 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 1017 1
4 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
5 LEDA 1819621 GiC 12 58 18.21265 +27 50 54.5715 17.77   16.76 16.87   ~ 24 0
6 LEDA 1834087 GiC 12 58 32.287 +28 22 40.70     17.16 16.88   ~ 23 0
7 LEDA 4349363 GiC 12 58 38.159 +27 49 21.30 18.25   16.75 16.53   ~ 21 0
8 LEDA 126817 GiC 12 58 42.589 +27 45 37.78     16.30 16.15   ~ 54 0
9 LEDA 126798 GiC 12 59 14.984 +28 15 03.66 17.42 17.60 16.12 16.01   ~ 27 0
10 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
11 LEDA 126782 GiC 12 59 46.279 +27 44 46.50 18.39 18.16 16.81 16.82 16.95 ~ 25 0
12 GMP 3016 GiC 13 00 01.03440 +28 04 54.7752 18.78   17.69 17.55   ~ 18 0
13 LEDA 126767 LSB 13 00 08.05642 +27 46 23.9143 17.45 17.675 16.57 16.45 16.398 ~ 36 0
14 GMP 2673 GiC 13 00 26.234 +27 27 34.91     17.39 17.21   ~ 10 0
15 GMP 2662 G 13 00 27.307 +27 26 18.96     18.60 18.36   ~ 3 0
16 LEDA 1804864 GiC 13 00 29.208 +27 19 59.58     15.95 15.70   ~ 12 0
17 LEDA 44765 EmG 13 00 29.227 +27 30 53.62   15.5 15.22 14.98   ~ 32 0
18 GMP 2552 GiC 13 00 38.630 +27 28 35.27     18.27 17.92   ~ 8 0
19 Z 245-36 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 297 0
20 SDSS J160154.20+160016.7 G 16 01 54.207 +16 00 16.73           ~ 3 0
21 ACO 2147 ClG 16 02 11.96 +15 55 11.5           ~ 416 0
22 LEDA 1501966 G 16 02 15.283 +16 09 04.28           ~ 4 0
23 SDSS J160231.45+155749.9 G 16 02 31.46472 +15 57 49.8816           ~ 2 0
24 NAME Local Group GrG ~ ~           ~ 9325 0

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