2010ApJ...710L.156R

Query : 2010ApJ...710L.156R

2010ApJ...710L.156R - Astrophys. J., 710, L156-L160 (2010/February-3)

Galaxy mergers and the mass-metallicity relation: evidence for nuclear metal dilution and flattened gradients from numerical simulations.

RUPKE D.S.N., KEWLEY L.J. and BARNES J.E.

Abstract (from CDS):

Recent results comparing interacting galaxies to the mass-metallicity relation show that their nuclear oxygen abundances are unexpectedly low. We present analysis of N-body/smoothed-particle hydrodynamics numerical simulations of equal-mass mergers that confirm the hypothesis that these underabundances are accounted for by radial inflow of low-metallicity gas from the outskirts of the two merging galaxies. The underabundances arise between first and second pericenters, and the simulated abundance dilution is in good agreement with observations. The simulations further predict that the radial metallicity gradients of the disk galaxies flatten shortly after first passage, due to radial mixing of gas. These predictions will be tested by future observations of the radial metallicity distributions in interacting galaxies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: abundances - galaxies: evolution - galaxies: interactions - galaxies: ISM

Simbad objects: 1

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Number of rows : 1
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 4676 IG 12 46 10.18 +30 43 53.7   14.1       ~ 318 0

Query : 2010ApJ...710L.156R

Basic data :
NGC 4676 -- Interacting Galaxies
Other object types: otypes_help 		G (2021MNRAS,APG,...), IR (IRAS,PSCz), IG (VV), GrG ([H37])
ICRS coord. (ep=J2000) : 		12 46 10.18 +30 43 53.7 [ 2100.00 1800.00 90 ] D 1999ApJS..125..409C
FK4 coord. (ep=B1950 eq=1950) : 		12 43 44.20 +31 00 16.5 [ 2100.00 1800.00 90 ]
Gal coord. (ep=J2000) : 		140.35618 +86.21690 [ 2100.00 1800.00 90 ]
Radial velocity / Redshift / cz : 		V(km/s) 6669 [~] / z(spectroscopic) 0.0225 [~] / cz 6745 [~]
   (Opt) D 2011MNRAS.414..500H
Morphological type: 		Sdm C 2015A&A...582A..21B
Angular size (arcmin): 		2.344 0.446 ~ (~) D ~
Fluxes (1) :
B 14.1 [~] E ~
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 10 		Display criteria :

Identifiers (12) :
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NGC 4676 IRAS F12437+3100 NAME the Mice Z 159-72
APG 242 NAME Mice Galaxy PSCz Q12437+3059 Z 1243.7+3100
IRAS 12437+3059 NAME Mice VV 224 [H37] 459

References (318 between 1850 and 2026) (Total 318)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 1    Distance : 2   

   

Observing logs
ISO : 1   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 4676

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NGC 4676 APG 242 IRAS 12437+3059 IRAS F12437+3100

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