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Title: A uniform contribution of core-collapse and type Ia supernovae to the chemical enrichment pattern in the outskirts of the Virgo Cluster

Abstract

We present the first measurements of the abundances of α-elements (Mg, Si, and S) extending out beyond the virial radius of a cluster of galaxies. Our results, based on Suzaku Key Project observations of the Virgo Cluster, show that the chemical composition of the intracluster medium is consistent with being constant on large scales, with a flat distribution of the Si/Fe, S/Fe, and Mg/Fe ratios as a function of radius and azimuth out to 1.4 Mpc (1.3 r 200). Chemical enrichment of the intergalactic medium due solely to core-collapse supernovae (SNcc) is excluded with very high significance; instead, the measured metal abundance ratios are generally consistent with the solar value. The uniform metal abundance ratios observed today are likely the result of an early phase of enrichment and mixing, with both SNcc and SNe Ia contributing to the metal budget during the period of peak star formation activity at redshifts of 2–3. Furthermore, we estimate the ratio between the number of SNe Ia and the total number of supernovae enriching the intergalactic medium to be between 12% and 37%, broadly consistent with the metal abundance patterns in our own Galaxy or with the SN Ia contribution estimated for the clustermore » cores.« less

Authors:
 [1];  [2];  [3];  [3];  [4];  [2]
  1. Institute of Space and Astronautical Science (ISAS), Kanagawa (Japan)
  2. Stanford Univ., Stanford, CA (United States)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Institute of Space and Astronautical Science (ISAS), Kanagawa (Japan); Univ. of Tokyo, Tokyo (Japan)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1270628
Report Number(s):
SLAC-PUB-16657
Journal ID: ISSN 2041-8213; arXiv:1506.06164
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal. Letters
Additional Journal Information:
Journal Volume: 811; Journal Issue: 2; Journal ID: ISSN 2041-8213
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; astrophysics; ASTRO; galaxies: clusters: individual (Virgo Cluster); galaxies: clusters: intracluster medium; ISM: abundances; X-rays: galaxies: clusters

Citation Formats

Simionescu, A., Werner, N., Urban, O., Allen, S. W., Ichinohe, Y., and Zhuravleva, I. A uniform contribution of core-collapse and type Ia supernovae to the chemical enrichment pattern in the outskirts of the Virgo Cluster. United States: N. p., 2015. Web. doi:10.1088/2041-8205/811/2/L25.
Simionescu, A., Werner, N., Urban, O., Allen, S. W., Ichinohe, Y., & Zhuravleva, I. A uniform contribution of core-collapse and type Ia supernovae to the chemical enrichment pattern in the outskirts of the Virgo Cluster. United States. doi:10.1088/2041-8205/811/2/L25.
Simionescu, A., Werner, N., Urban, O., Allen, S. W., Ichinohe, Y., and Zhuravleva, I. Thu . "A uniform contribution of core-collapse and type Ia supernovae to the chemical enrichment pattern in the outskirts of the Virgo Cluster". United States. doi:10.1088/2041-8205/811/2/L25. https://www.osti.gov/servlets/purl/1270628.
@article{osti_1270628,
title = {A uniform contribution of core-collapse and type Ia supernovae to the chemical enrichment pattern in the outskirts of the Virgo Cluster},
author = {Simionescu, A. and Werner, N. and Urban, O. and Allen, S. W. and Ichinohe, Y. and Zhuravleva, I.},
abstractNote = {We present the first measurements of the abundances of α-elements (Mg, Si, and S) extending out beyond the virial radius of a cluster of galaxies. Our results, based on Suzaku Key Project observations of the Virgo Cluster, show that the chemical composition of the intracluster medium is consistent with being constant on large scales, with a flat distribution of the Si/Fe, S/Fe, and Mg/Fe ratios as a function of radius and azimuth out to 1.4 Mpc (1.3 r200). Chemical enrichment of the intergalactic medium due solely to core-collapse supernovae (SNcc) is excluded with very high significance; instead, the measured metal abundance ratios are generally consistent with the solar value. The uniform metal abundance ratios observed today are likely the result of an early phase of enrichment and mixing, with both SNcc and SNe Ia contributing to the metal budget during the period of peak star formation activity at redshifts of 2–3. Furthermore, we estimate the ratio between the number of SNe Ia and the total number of supernovae enriching the intergalactic medium to be between 12% and 37%, broadly consistent with the metal abundance patterns in our own Galaxy or with the SN Ia contribution estimated for the cluster cores.},
doi = {10.1088/2041-8205/811/2/L25},
journal = {The Astrophysical Journal. Letters},
number = 2,
volume = 811,
place = {United States},
year = {2015},
month = {9}
}

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Cited by: 21 works
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    Works referencing / citing this record:

    The non-uniformity of galaxy cluster metallicity profiles
    journal, November 2018

    • Lovisari, L.; Reiprich, T. H.
    • Monthly Notices of the Royal Astronomical Society, Vol. 483, Issue 1
    • DOI: 10.1093/mnras/sty3130

    CHEERS: The chemical evolution RGS sample
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