1994A&A...292...13B

Query : 1994A&A...292...13B

1994A&A...292...13B - Astronomy and Astrophysics, volume 29213-19 (1994/12-1)

Photoionization in elliptical galaxies by old stars.

BINETTE L., MAGRIS C.G., STASINSKA G. and BRUZUAL G.A.

Abstract (from CDS):

In an effort to explain the ionization of gas in elliptical galaxies, we have computed the Lyman continuum output from an ageing starburst, using isochrone synthesis spectral evolution techniques. We have shown that post-AGB stars provide sufficient ionizing radiation to account for the observed Hα luminosity and equivalent width in very early type galaxies. Photoionization models using the radiation field from these stars are shown to easily reproduce the excitation level of the ionized gas. Thus, we argue that the ionization observed in normal elliptical galaxies is provided by their old stellar populations.

Abstract Copyright: ∼

Journal keyword(s): galaxies: elliptical - galaxies: ISM - galaxies: stellar content

Simbad objects: 15

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Number of rows : 15
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 NGC 745 Sy2 01 54 07.7184477264 -56 41 37.289686308   14.04   12.64   ~ 44 0
2 NGC 1395 SyG 03 38 29.789 -23 01 39.69   10.71   8.99   ~ 289 0
3 NGC 1453 EmG 03 46 27.2307890592 -03 58 07.831476768   13   11.30   ~ 189 0
4 ESO 118-34 GiG 04 40 17.485 -58 44 39.40   13.50 13.52 12.67 13.4 ~ 62 0
5 NGC 1947 GiG 05 26 47.613 -63 45 36.08   11.76 10.80 10.06   ~ 141 0
6 NGC 2974 Sy2 09 42 33.2918467632 -03 41 57.038311068   12.19   10.77   ~ 463 0
7 NGC 3962 LIN 11 54 40.0986420456 -13 58 30.234748836   13.16 12.16 11.15   ~ 162 1
8 NAME NGC 4636 Group GrG 12 42 49.5 +02 41 08           ~ 570 0
9 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
10 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
11 NGC 6868 Sy2 20 09 54.08207 -48 22 46.2470   11.58 9.22 10.01 7.91 ~ 239 2
12 ESO 234-21 Sy1 20 24 20.0036372112 -49 41 04.735739760   13.92   12.45   ~ 36 0
13 NGC 7097 EmG 21 40 12.9231946008 -42 32 21.879559932   12.66 11.71 11.21   ~ 123 0
14 NGC 7302 GiP 22 32 23.8132995648 -14 07 14.081965572   13       ~ 65 0
15 IC 1459 rG 22 57 10.60682195 -36 27 43.9966421   10.96 11.85 9.34 10.3 ~ 652 2

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