2013ApJ...772L..23B

Query : 2013ApJ...772L..23B

2013ApJ...772L..23B - Astrophys. J., 772, L23 (2013/August-1)

Clues on the rejuvenation of the S0 galaxy NGC 404 from the chemical abundance of its outer disk.

BRESOLIN F.

Abstract (from CDS):

The oxygen abundance of the outer disk of the nearby S0 galaxy NGC 404, a prototypical early-type galaxy with extended star formation, has been derived from the analysis of H II region spectra. The high mean value found, 12 + log(O/H) = 8.6±0.1, equivalent to approximately 80% of the solar value, argues against both the previously proposed cold accretion and recent merger scenarios as viable mechanisms for the assembly of the star-forming gas. The combination of the present-day gas metallicity with the published star formation history of this galaxy favors a model in which the recent star forming activity represents the declining tail of the original one.

Abstract Copyright: ∼

Journal keyword(s): galaxies: abundances - galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: individual: NGC 404 - galaxies: ISM

Nomenclature: Fig. 1, Table 1: [B2013] NN (Nos 1-19).

Simbad objects: 20

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Number of rows : 20
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 [B2013] 3 HII 01 09 08.62 +35 43 08.2           ~ 1 0
2 [B2013] 6 HII 01 09 13.27 +35 44 27.8           ~ 1 0
3 [B2013] 5 SN? 01 09 14.21 +35 43 50.7           ~ 1 0
4 [B2013] 4 HII 01 09 14.43 +35 43 44.3           ~ 1 0
5 [B2013] 8 HII 01 09 15.58 +35 45 37.7           ~ 1 0
6 [B2013] 9 HII 01 09 16.24 +35 46 41.7           ~ 1 0
7 [B2013] 1 HII 01 09 18.65 +35 41 57.5           ~ 1 0
8 [B2013] 2 PN? 01 09 18.94 +35 42 14.9           ~ 1 0
9 [B2013] 16 HII 01 09 19.22 +35 48 41.9           ~ 1 0
10 [B2013] 7 HII 01 09 19.48 +35 45 10.8           ~ 1 0
11 [B2013] 17 HII 01 09 22.06 +35 48 43.8           ~ 1 0
12 [B2013] 19 HII 01 09 26.25 +35 49 22.9           ~ 1 0
13 [B2013] 12 HII 01 09 26.73 +35 47 37.9           ~ 1 0
14 NGC 404 LIN 01 09 27.02 +35 43 05.3   12.56 11.73     ~ 511 0
15 [B2013] 11 HII 01 09 27.52 +35 47 35.0           ~ 1 0
16 [B2013] 10 HII 01 09 27.52 +35 47 35.0           ~ 1 0
17 [B2013] 18 HII 01 09 38.82 +35 48 44.8           ~ 1 0
18 [B2013] 15 HII 01 09 39.84 +35 48 30.5           ~ 1 0
19 [B2013] 13 HII 01 09 40.57 +35 47 55.2           ~ 1 0
20 [B2013] 14 HII 01 09 41.18 +35 48 01.0           ~ 1 0

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