2006A&A...459..353W


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.14CET00:35:10

2006A&A...459..353W - Astronomy and Astrophysics, volume 459, 353-360 (2006/11-4)

XMM-Newton high-resolution spectroscopy reveals the chemical evolution of M 87.

WERNER N., BOEHRINGER H., KAASTRA J.S., DE PLAA J., SIMIONESCU A. and VINK J.

Abstract (from CDS):

We present a study of chemical abundances in the giant elliptical galaxy M 87 using high-resolution spectra obtained with the Reflection Grating Spectrometers during two deep XMM-Newton observations. While we confirm the two-temperature structure of the inter-stellar medium (ISM) in M 87, we also show that a continuous temperature distribution describes the data equally well. The high statistics allow us, for the first time, to also determine relatively accurate abundance values for carbon and nitrogen. The comparison of the abundance ratios of C, N, O, and Fe in the ISM of M 87 with those in the stellar population of our Galaxy shows that the relative contribution of core-collapse supernovae to the enrichment of the ISM in M 87 is significantly less than in the Milky Way and indicates that the enrichment of the ISM by iron through Type Ia supernovae and by carbon and nitrogen is occurring in parallel. This suggests that the main sources of carbon and nitrogen in M 87 are the low- and intermediate-mass asymptotic giant branch stars. From the oxygen to iron abundance ratio in the hot gas, we estimate that the relative number of core collapse and type Ia supernovae contributing to the enrichment of the ISM in the core of M 87 is ∼60% and ∼40% respectively. The spatial distributions of iron and oxygen are different. Although the oxygen abundance distribution is flat, the iron abundance peaks in the core and has a gradient throughout the 4' wide field of view of the instrument, suggesting early enrichment by core-collapse supernovae and a continuous contribution of type Ia supernovae.

Abstract Copyright:

Journal keyword(s): galaxies: individual: M 87 - galaxies: intergalactic medium - galaxies: ISM - galaxies: abundances - cooling flows - X-rays: galaxies: clusters

Simbad objects: 6

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Number of rows : 6

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 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 339 1
2 Mrk 421 BLL 11 04 27.3139210166 +38 12 31.798324828   13.50 12.90 8.31   ~ 2336 1
3 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5671 0
4 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6048 3
5 NGC 4636 LIN 12 42 49.867 +02 41 16.01   12.62 11.84     ~ 1027 1
6 QSO B2155-304 BLL 21 58 52.0651817803 -30 13 32.120657891   13.36 13.09 12.62   ~ 1522 1

    Equat.    Gal    SGal    Ecl

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2019.12.14-00:35:10

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