1999A&A...350....9O

Query : 1999A&A...350....9O

1999A&A...350....9O - Astronomy and Astrophysics, volume 3509-16 (1999/10-1)

Starbursts in active galaxy nuclei: observational constraints from IR stellar absorption lines.

OLIVA E., ORIGLIA L., MAIOLINO R. and MOORWOOD A.F.M.

Abstract (from CDS):

High quality infrared spectra of active galaxies including the stellar absorption features of Si at 1.59µm, CO(6,3) at 1.62µm, and CO(2,0) at 2.29µm are used to measure the stellar mass to light ratio at 1.65µm (M/LH) and investigate the occurrence of circum-nuclear starbursts. We find that old and powerful starbursts are relatively common in obscured AGNs (5 objects out of 13) while absent in genuine Seyfert 1's (0 objects out of 8). The data are also used to derive the non-stellar continuum which is very red and compatible with emission from warm (≃1000K) dust even in bare Sy1's, thus indicating that the near IR nuclear continuum is reprocessed radiation. Hot dust (≃800K) emission is also detected in a few obscured AGNs, including the Seyfert 2 prototype NGC 1068. The observed non-stellar flux is too high to be accounted for by scattered light and therefore indicates that the material obscuring the AGN must have a quite small (≲1pc) projected size.

Abstract Copyright: ∼

Journal keyword(s): galaxies: stellar content - galaxies: starburst - galaxies: Seyfert - galaxies: active

Simbad objects: 31

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Number of rows : 31
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 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
2 ESO 113-45 Sy1 01 23 45.7631533440 -58 48 20.808928944   14.08 13.83 13.34   ~ 965 0
3 NGC 1052 Bla 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1397 2
4 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
5 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
6 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 697 1
7 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 756 3
8 Z 395-23 Sy1 05 16 11.4092471904 -00 08 59.157166920   14.30 13.92     ~ 953 1
9 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 712 1
10 IRAS 05563-3820 Sy1 05 58 02.0566707456 -38 20 04.452162288   16.05 14.98 11.6   ~ 249 1
11 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
12 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 951 3
13 MCG-05-23-016 Sy2 09 47 40.1332188528 -30 56 55.960779696   14.10 13.69 12.44   ~ 611 0
14 Z 7-49 Sy1 09 52 19.168 -01 36 44.10   14.99 14.39 11.2   ~ 348 1
15 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 920 2
16 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1765 1
17 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
18 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1179 0
19 M 104 LIN 12 39 59.43185902 -11 37 22.9961800 9.51 9.55 8.00 8.05   ~ 1465 2
20 NGC 4785 Sy2 12 53 27.3416048448 -48 44 57.213423456   13.22 12.09 12.8 12.5 ~ 75 0
21 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
22 MCG-06-30-015 Sy1 13 35 53.7691256160 -34 17 44.160716796   13.89 13.61 8.9   ~ 1559 0
23 IC 4329A Sy1 13 49 19.2601801224 -30 18 34.213815504   13.81 13.66 12.18 12.35 ~ 876 1
24 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
25 NGC 5506 Bla 14 13 14.8761010056 -03 12 27.556909272   15.25 14.38     ~ 1173 1
26 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
27 Liller 1 Cl* 17 33 24.50 -33 23 20.0           ~ 311 0
28 NGC 7552 Sy1 23 16 10.66 -42 35 04.7 11.34 11.22 10.57 10.08 11.1 ~ 574 3
29 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 978 3
30 NGC 7714 AGN 23 36 14.1257730600 +02 09 18.197422668   14.91 14.36     ~ 788 1
31 APG 284 PaG 23 36 19 +02 09.3   12.6       ~ 608 0

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