2008A&A...482...59D


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST06:01:23

2008A&A...482...59D - Astronomy and Astrophysics, volume 482, 59-65 (2008/4-4)

Ages and metallicities of circumnuclear star formation regions from Gemini IFU observations.

DORS O.L.Jr, STORCHI-BERGMANN T., RIFFEL R.A. and SCHIMDT ALEX.A.

Abstract (from CDS):

We derive the age and metallicity of circumnuclear star formation regions (CNSFRs) located in the spiral galaxies NGC6951 and NGC1097 and investigate the cause of the very low equivalent widths of emission lines found for these regions. We used optical two-dimensional spectroscopic data obtained with Gemini GMOS-IFUs and a grid of photoionization models to derive the the metallicities and ages of CNSFRs. We find star formation rates in the range 0.002-0.14M/yr and oxygen abundance of 12+log(O/H)≃8.8dex, similar to those of most metal-rich nebulae located in the inner region of galactic disks. We conclude that the very low emission-line equivalent widths observed in CNSFRs are caused by the ``contamination'' of the continuum by (1) contribution of the underlying bulge continuum combined with (2) contribution from previous episodes of star formation at the CNSFRs.

Abstract Copyright:

Journal keyword(s): Galaxy: abundances - ISM: abundances - ISM: HII regions - ISM: evolution - Galaxy: bulge

CDS comments: Paragraph. 5.3 NGC 3505 is a probable misprint for NGC 3504.

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1145 3
2 NGC 1326 GiG 03 23 56.397 -36 27 52.78 11.69 11.43 10.54 10.02 10.9 ~ 229 1
3 NGC 2905 H2G 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 965 3
4 NGC 3310 AGN 10 38 45.857 +53 30 11.89   12.45 12.15     ~ 719 1
5 M 95 GiP 10 43 57.733 +11 42 13.00 10.71 10.51 9.73 9.48   ~ 903 2
6 NGC 3504 LIN 11 03 11.191 +27 58 20.77   13.48 12.93     ~ 475 2
7 NGC 4314 LIN 12 22 31.978 +29 53 43.09 11.72 11.43 10.58     ~ 442 1
8 M 100 AGN 12 22 54.9318850854 +15 49 20.294302163 10.04 10.05 9.35     ~ 1617 2
9 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2157 2
10 NGC 6951 Sy2 20 37 14.1181441937 +66 06 20.078027288   11.64 10.65     ~ 489 2
11 NGC 7742 GiP 23 44 15.7546655695 +10 46 01.536389590   12.5       ~ 190 0
12 NGC 7771 GiG 23 51 24.880 +20 06 42.57 13.42 13.08 12.25     ~ 305 4

    Equat.    Gal    SGal    Ecl

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2019.10.17-06:01:23

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