2007ApJ...659L.103R

Query : 2007ApJ...659L.103R

2007ApJ...659L.103R - Astrophys. J., 659, L103-L106 (2007/April-3)

The first detection of near-infrared CN bands in active galactic nuclei: signature of star formation.

RIFFEL R., PASTORIZA M.G., RODRIGUEZ-ARDILA A. and MARASTON C.

Abstract (from CDS):

We present the first detection of the near-infrared CN absorption band in the nuclear spectra of active galactic nuclei (AGNs). This feature is a recent star formation tracer, being particularly strong in carbon stars. The equivalent width of the CN line correlates with that of the CO at 2.3 µm as expected in stellar populations (SPs) with ages between ∼0.2 and ∼2 Gyr. The presence of the 1.1 µm CN band in the spectra of the sources is taken as unambiguous evidence of the presence of young/intermediate SPs close to the central source of the AGNs. Near-infrared bands can be powerful age indicators for star formation connected to AGNs, the understanding of which is crucial in the context of galaxy formation and AGN feedback.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Active - Galaxies: Nuclei - Galaxies: Stellar Content

Simbad objects: 16

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Number of rows : 16
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 Z 478-15 Sy2 00 03 09.6087980256 +21 57 36.971989884   15.30 14.62     ~ 212 1
2 NGC 17 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 369 1
3 NGC 591 Sy1 01 33 31.2305692968 +35 40 05.628351108   14.71 13.90     ~ 205 0
4 Z 386-35 Sy1 01 43 57.7777898304 +02 20 59.531401716   14.90 14.07     ~ 569 1
5 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1448 3
6 NGC 1142 Sy2 02 55 12.2311509144 -00 11 00.807149472   15.42 14.41     ~ 350 1
7 Z 524-40 Sy2 02 59 58.5970307633 +36 49 13.808979663   14.89 13.96     ~ 369 1
8 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 697 1
9 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 712 1
10 NGC 3310 AGN 10 38 45.85707 +53 30 11.8940   12.45 12.15     ~ 809 1
11 NGC 5929 Sy1 15 26 06.1564333536 +41 40 14.384294616   13.0 14.00     ~ 450 0
12 NGC 5930 AGN 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 441 0
13 NGC 5953 Sy2 15 34 32.40240 +15 11 37.7990   13.23 12.45     ~ 389 1
14 NGC 7682 Sy2 23 29 03.9181335984 +03 31 59.921415444   14.3       ~ 254 1
15 NGC 7714 AGN 23 36 14.1257730600 +02 09 18.197422668   14.91 14.36     ~ 788 1
16 APG 284 PaG 23 36 19 +02 09.3   12.6       ~ 608 0

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