2025A&A...695A.213M

Query : 2025A&A...695A.213M

2025A&A...695A.213M - Astronomy and Astrophysics, volume 695A213 (2025/3-1)

Stellar populations from H-band VLT spectroscopy in a sample of seven active galaxies.

MARQUEZ I., BOISSON C., JOLY M., PELAT D. and DURRET F.

Abstract (from CDS):

Context. The relationship between an active galactic nucleus (AGN) and its host galaxy is still far from being understood. Properties of the host galaxies of Seyfert nuclei, such as luminosity concentration, morphological type, metallicity, and age of the stellar population, are expected to be related with nuclear activity - either at the epoch of galaxy formation or at the present day via feeding of the central black hole.
Aims. In this paper, we investigate whether stellar ages and metallicities are linked to the activity within the nucleus in a sample of AGNs of various types.
Methods. Our sample includes seven AGNs, from Seyfert 1 to LINERs, observed with VLT/ISAAC and VLT/SINFONI. Based on an inverse method using a stellar library, we analysed H band infrared spectra, in a wavelength region devoid of emission lines, at a spectral resolution of ≈3000, in the few central 100 pc. Hubble Space Telescope images were used to visualise the regions defined in each galaxy.
Results. For each galaxy, we give the results of the spectral synthesis, in particular the percentages of the stellar, power law, and black-body continua, and the percentages of various stellar types that account for the stellar lines.
Conclusions. Out of the seven galaxies, three show strong and recent star formation in the inner 100 pc, while no star formation is detected in the three genuine Seyfert 2 galaxies. Beyond a radius of 100 pc, all show more or less recent star formation. Moreover, we can conclude that the star formation history of the inner nucleus is highly heterogeneous.

Abstract Copyright: © The Authors 2025

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

Simbad objects: 41

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Number of rows : 41
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 V* V428 And LP* 00 36 46.4410654008 +44 29 18.920176764   6.727 5.129     K6IIIa 111 0
2 * del And SB* 00 39 19.6031132231 +30 51 39.540873571 6.04 4.56 3.28 2.36 1.70 K3III-IIIbCN0.5 340 0
3 HD 10307 SB* 01 41 47.1268541099 +42 36 48.221567818 5.69 5.58 4.96 4.43 4.10 G1V 523 0
4 * rho Per LP* 03 05 10.59385 +38 50 24.9943 6.83 5.04 3.39 1.59 -0.03 M4+IIIa 330 0
5 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 870 1
6 * h Tau dS* 04 19 57.7045712640 +14 02 06.732211488   5.856 5.568 5.407 5.250 F0IV 243 0
7 HD 36395 PM* 05 31 27.3957852161 -03 40 38.024004501 10.626 9.443 7.968 6.996 5.913 M1.5Ve 574 0
8 * alf Lep V* 05 32 43.8161188 -17 49 20.241380 3.02 2.77 2.57 2.35 2.14 F0Ib 289 0
9 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 712 1
10 HD 39715 PM* 05 54 28.5765205846 +02 08 32.041435253   9.86   8.1   K3V 93 0
11 * alf Ori s*r 05 55 10.30536 +07 24 25.4304 4.38 2.27 0.42 -1.17 -2.45 M1-M2Ia-Iab 1789 0
12 V* V350 CMa gD* 06 42 46.0439059320 -22 26 54.936081132   6.56 6.23     F2V 73 0
13 HD 79210 SB* 09 14 22.7748624830 +52 41 11.791503353   9.388   6.8   K7V 349 0
14 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 951 3
15 NGC 2993 Sy1 09 45 48.325 -14 22 06.02 12.72 13.11 12.64 13.4 13.0 ~ 194 2
16 NGC 3185 Sy2 10 17 38.5650471192 +21 41 17.573817228   12.99 12.17 12.37   ~ 308 1
17 NGC 3189 GiP 10 18 05.643 +21 49 54.98 12.60 12.12 11.15 11.14   ~ 422 2
18 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1765 1
19 * nu. Vir LP* 11 45 51.5595979999 +06 31 45.748996439 7.32 5.54 4.04 2.79 1.78 M1III 267 0
20 HD 106116 PM* 12 12 28.8425407188 -03 05 04.109959534   8.15 7.50     G5V 206 0
21 * 5 CVn * 12 24 01.4942854464 +51 33 44.124636780   5.643 4.761     G7IIIBa0.3 160 0
22 HD 112164 SB* 12 54 58.5434001533 -44 09 06.955051834 6.78 6.53 5.89     F9Vp 138 0
23 * 20 CVn dS* 13 17 32.5411518092 +40 34 21.384382657   5.010 4.698     A9IImF2 248 0
24 IC 4271 Sy2 13 29 21.4493074392 +37 24 50.460172056   15.6       ~ 131 1
25 MCG-06-30-015 Sy1 13 35 53.7691256160 -34 17 44.160716796   13.89 13.61 8.9   ~ 1559 0
26 HD 119850 PM* 13 45 43.7755597223 +14 53 29.471707437 10.989 9.894 8.50 7.465 6.363 M2V 402 0
27 HD 131977 BY* 14 57 28.0007918772 -21 24 55.727265310 7.89 6.83 5.72 4.74 4.19 K4V 525 0
28 V* U Nor cC* 15 42 20.9185773096 -55 18 42.939346104   10.68 9.22     F8Ib/II 160 0
29 V* V636 Her LP* 16 47 19.7469474888 +42 14 20.097704616 9.07 7.48 5.87     M4.5III 75 0
30 NGC 6221 Sy2 16 52 46.329 -59 13 00.99   10.90 13.45 9.68 10.4 ~ 328 0
31 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
32 HD 173739 PM* 18 42 46.7043860406 +59 37 49.409446059   10.43 8.93     M3V 427 1
33 * sig Dra PM* 19 32 21.5902098601 +69 39 40.235805206 5.860 5.460 4.680 4.04 3.63 K0V 691 0
34 * f02 Cyg * 21 06 36.0934336570 +47 38 54.252204111   6.079 4.514     K4Ib-IIa 118 0
35 * 61 Cyg A BY* 21 06 53.9395895022 +38 44 57.902349973 7.50 6.39 5.21 4.19 3.54 K5V 1099 0
36 * bet Aqr * 21 31 33.5320760349 -05 34 16.229381029 4.27 3.71 2.89 2.29 1.84 G0Ib 463 0
37 * 11 Cep PM* 21 41 55.3084514088 +71 18 41.267467908       3.9   K0.5III 156 0
38 * zet Cep s*r 22 10 51.2777055617 +58 12 04.542602641 6.62 4.90 3.35 2.27 1.49 K1.5Ib 295 0
39 SCG2 2315-4241 CGG 23 16 10.800 -42 35 05.00   11.34       ~ 23 0
40 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 978 3
41 * ups Peg PM* 23 25 22.7828725585 +23 24 14.762916815 5.15 5.01 4.40 3.86 3.54 F8III 263 0

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