2015A&A...579A..45B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST03:07:02

2015A&A...579A..45B - Astronomy and Astrophysics, volume 579A, 45-45 (2015/7-1)

Central star formation and metallicity in CALIFA interacting galaxies.

BARRERA-BALLESTEROS J.K., SANCHEZ S.F., GARCIA-LORENZO B., FALCON-BARROSO J., MAST D., GARCIA-BENITO R., HUSEMANN B., VAN DE VEN G., IGLESIAS-PARAMO J., ROSALES-ORTEGA F.F., PEREZ-TORRES M.A., MARQUEZ I., KEHRIG C., MARINO R.A., VILCHEZ J.M., GALBANY L., LOPEZ-SANCHEZ A.R., WALCHER C.J. (The CALIFA collaboration)

Abstract (from CDS):

We use optical integral-field spectroscopic (IFS) data from 103 nearby galaxies at different stages of the merging event, from close pairs to merger remnants provided by the CALIFA survey, to study the impact of the interaction in the specific star formation and oxygen abundance on different galactic scales. To disentangle the effect of the interaction and merger from internal processes, we compared our results with a control sample of 80 non-interacting galaxies. We confirm the moderate enhancement (x2-3 times) of specific star formation for interacting galaxies in central regions as reported by previous studies; however, the specific star formation is comparable when observed in extended regions. We find that control and interacting star-forming galaxies have similar oxygen abundances in their central regions, when normalized to their stellar masses. Oxygen abundances of these interacting galaxies seem to decrease compared to the control objects at the large aperture sizes measured in effective radius. Although the enhancement in central star formation and lower metallicities for interacting galaxies have been attributed to tidally induced inflows, our results suggest that other processes such as stellar feedback can contribute to the metal enrichment in interacting galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: interactions - galaxies: star formation - galaxies: abundances

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 UGC 312 AGN 00 31 23.840 +08 28 01.32   14.6   13.10   ~ 87 0
2 NGC 169 SyG 00 36 51.611 +23 59 27.37   13.70 13.1     ~ 105 0
3 NGC 214 AGN 00 41 28.0224647822 +25 29 57.842961904   13.0       ~ 144 0
4 NGC 4676 IG 12 46 10.18 +30 43 53.7   14.1       ~ 297 0

    Equat.    Gal    SGal    Ecl

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2020.07.10-03:07:02

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