2017A&A...598A..45G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST00:16:10

2017A&A...598A..45G - Astronomy and Astrophysics, volume 598A, 45-45 (2017/2-1)

Structural analysis of star-forming blue early-type galaxies Merger-driven star formation in elliptical galaxies.

GEORGE K.

Abstract (from CDS):

Context. Star-forming blue early-type galaxies at low redshift can give insight to the stellar mass growth of L* elliptical galaxies in the local Universe.
Aims. We wish to understand the reason for star formation in these otherwise passively evolving red and dead stellar systems. The fuel for star formation can be acquired through recent accretion events such as mergers or flyby. The signatures of such events should be evident from a structural analysis of the galaxy image.
Methods. We carried out structural analysis on SDSS r-band imaging data of 55 star-forming blue elliptical galaxies, derived the structural parameters, analysed the residuals from best-fit to surface brightness distribution, and constructed the galaxy scaling relations.
Results. We found that star-forming blue early-type galaxies are bulge-dominated systems with axial ratio >0.5 and surface brightness profiles fitted by Sersic profiles with index (n) mostly >2. Twenty-three galaxies are found to have n<2; these could be hosting a disc component. The residual images of the 32 galaxy surface brightness profile fits show structural features indicative of recent interactions. The star-forming blue elliptical galaxies follow the Kormendy relation and show the characteristics of normal elliptical galaxies as far as structural analysis is concerned. There is a general trend for high-luminosity galaxies to display interaction signatures and high star formation rates.
Conclusions. The star-forming population of blue early-type galaxies at low redshifts could be normal ellipticals that might have undergone a recent gas-rich minor merger event. The star formation in these galaxies will shut down once the recently acquired fuel is consumed, following which the galaxy will evolve to a normal early-type galaxy.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: star formation - galaxies: structure

Simbad objects: 55

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Number of rows : 55

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 2MASX J01035875+1514505 EmG 01 03 58.7447537834 +15 14 50.136407530           ~ 12 0
2 IRAS F01390+1325 Sy1 01 41 43.185 +13 40 32.87   17.37 16.88     ~ 18 0
3 2MASX J03012623-0004257 G 03 01 26.2394800370 -00 04 25.548174114   16.80   15.60   ~ 11 0
4 2MASX J07472310+2220409 LSB 07 47 23.115 +22 20 41.28           ~ 8 0
5 2MASX J07542057+2551330 G 07 54 20.6006683283 +25 51 33.272172820   15.6       ~ 11 0
6 2MASX J07560866+1722508 G 07 56 08.6653767273 +17 22 50.404948625           ~ 10 0
7 2MASX J07563635+1844180 G 07 56 36.3197113652 +18 44 17.610850924           ~ 9 0
8 2MASX J07591245+5333256 G 07 59 12.379 +53 33 25.94   16.0       ~ 19 0
9 2MASX J08102007+5612266 G 08 10 20.1417517110 +56 12 26.235851101           ~ 5 0
10 2MASX J08175629+4707190 G 08 17 56.2647455723 +47 07 19.563309495     16.5     ~ 12 0
11 LEDA 2424487 G 08 29 09.1226665963 +52 49 06.852921021           ~ 7 0
12 2MASX J08434673+3134531 G 08 43 46.7345502922 +31 34 52.534010824           ~ 6 0
13 FIRST J085311.4+370807 rG 08 53 11.412 +37 08 06.51           ~ 13 0
14 2MASX J09132369+4358339 G 09 13 23.6831744161 +43 58 34.032521794           ~ 12 0
15 2MASX J09242957+5341377 G 09 24 29.5726998166 +53 41 37.868754894           ~ 7 0
16 2MASX J10162833+0335024 G 10 16 28.3622713100 +03 35 02.811551045           ~ 8 0
17 2MASX J10203492+2914107 G 10 20 34.9232466465 +29 14 10.745488041     16.08     ~ 8 0
18 2MASX J10252470+2725064 G 10 25 24.7042830694 +27 25 06.243560249           ~ 7 0
19 6dFGS gJ102654.6-003229 rG 10 26 54.590 -00 32 29.39   15.5   14.838   ~ 20 0
20 2MASX J10543792+5539457 G 10 54 37.8928761122 +55 39 45.872610863           ~ 7 0
21 2dFGRS TGN372Z081 G 11 23 26.982 -00 42 48.85   16.757   15.604   ~ 12 1
22 NVSS J113122+324224 rG 11 31 22.0417852419 +32 42 22.756600210   15.4       ~ 18 0
23 2MASX J11520495+4557061 G 11 52 04.9890740793 +45 57 06.567811718           ~ 6 0
24 NVSS J120616+633818 rG 12 06 17.0876519910 +63 38 19.069008374           ~ 12 0
25 2MASX J12064725+0117100 GiC 12 06 47.2185607998 +01 17 09.849753676   16.471   15.348   ~ 17 0
26 2dFGRS TGN316Z109 G 12 08 23.5236757179 +00 06 36.996024056   15.2       ~ 25 0
27 2MASX J12202312+0851371 G 12 20 23.1200523732 +08 51 37.177912553           ~ 9 0
28 2MASX J12203741+5628464 G 12 20 37.4397705337 +56 28 46.122334801           ~ 6 0
29 Mrk 217 G 12 35 02.6522270586 +66 22 33.430937362   16.0       ~ 15 0
30 2MASX J13014144+0440505 GiG 13 01 41.4410042890 +04 40 49.930217280   15.4       ~ 15 0
31 2MASX J13262084+3141593 GiC 13 26 20.7967110993 +31 41 59.767722831   15.6       ~ 15 0
32 2MASX J13474770+1116268 G 13 47 47.7160001491 +11 16 26.933081162   15.6       ~ 11 0
33 NGC 5373 G 13 57 07.4597546907 +05 15 06.812879161   15.3       ~ 19 0
34 2MASX J14024870+5230005 G 14 02 48.792 +52 30 00.80   17.0       ~ 11 0
35 FIRST J140656.3-013540 rG 14 06 56.367 -01 35 40.98   15.1   14.511   ~ 24 0
36 2MASX J14074719+5238092 G 14 07 47.195 +52 38 09.72           ~ 8 0
37 2MASX J14143324+4045228 G 14 14 33.2310671480 +40 45 22.978965145           ~ 10 0
38 2MASX J14173259+3620189 G 14 17 32.5863114783 +36 20 19.108816455           ~ 7 0
39 Mrk 473 G 14 32 22.705 +56 51 08.33   15.6       ~ 24 1
40 2MASX J14373292+0804427 G 14 37 32.9469626628 +08 04 42.993067377           ~ 9 0
41 2MASX J14511563+6200148 G 14 51 15.6534567925 +62 00 14.656151334           ~ 12 0
42 2MASX J14532341+3904136 G 14 53 23.3961691733 +39 04 13.561945515           ~ 9 0
43 2MASX J15171971+0319183 G 15 17 19.736 +03 19 18.92           ~ 8 0
44 2MASX J15180963+2542109 G 15 18 09.646 +25 42 11.54           ~ 8 0
45 2MASX J15234709-0038227 G 15 23 47.1071969564 -00 38 22.947937480   16.85   15.40   ~ 12 0
46 2MASX J15445147+1751230 G 15 44 51.457 +17 51 22.52           ~ 7 0
47 2MASX J15500042+4158115 GiG 15 50 00.4650908243 +41 58 11.204792364   15.5       ~ 14 0
48 2MASX J15533553+3218203 G 15 53 35.5588171742 +32 18 20.488127759           ~ 8 0
49 LEDA 1515973 G 16 04 39.4068381788 +16 44 43.561685692           ~ 5 0
50 2MASX J16075399+2003035 G 16 07 53.979 +20 03 03.82           ~ 10 0
51 2MASX J16181870+3406397 GiC 16 18 18.6843631720 +34 06 40.154773510   16.5       ~ 14 0
52 Mrk 888 EmG 16 44 30.7531269479 +19 56 26.698881075   15.40       ~ 34 0
53 2MASX J16511671+2806519 G 16 51 16.6814702569 +28 06 52.623666240           ~ 7 0
54 2MASX J17232488+2748465 G 17 23 24.8700985245 +27 48 46.244236558           ~ 7 0
55 2MASX J22151621-0915475 EmG 22 15 16.1841906905 -09 15 47.505060530   15.90   14.74   ~ 13 0

    Equat.    Gal    SGal    Ecl

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2020.07.14-00:16:10

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