Helium abundance (and H0) in X-COP galaxy clusters

被引：2
作者：
Ettori, Stefano [1 ,2 ]
Ghirardini, Vittorio [3 ]
Eckert, Dominique [4 ]
机构：
[1] INAF, Osservatorio Astrofis & Sci Spazio, Bologna, Italy
[2] Ist Nazl Fis Nucl, Sez Bologna, Bologna, Italy
[3] Harvard & Smithsonian, Ctr Astrophys, Cambridge, MA USA
[4] Univ Geneva, Dept Astron, Geneva, Switzerland
来源：
ASTRONOMISCHE NACHRICHTEN | 2020年 / 341卷 / 02期
基金：
欧盟地平线“2020”;
关键词：
galaxies; clusters; general-X-rays; clusters-(galaxies; ) intergalactic medium-(cosmology; ) cosmological parameters; RAY;
D O I：
10.1002/asna.202023780
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the constraints on the helium abundance in 12 X-ray-luminous galaxy clusters that have been mapped in their X-ray and Sunyaev-Zeldovich (SZ) signals out to R-200 for the XMM-Newton Cluster Outskirts Project (X-COP). The unprecedented precision available for the estimate of H-0 allows us to investigate how much the reconstructed X-ray and SZ signals are consistent with the expected ratio x between helium and proton densities of 0.08-0.1. We find that an H-0 around 70 km s(- 1) Mpc(- 1) is preferred from our measurements, with lower values of H-0 as suggested from the Planck collaboration (67 km s(- 1) Mpc(- 1)), requiring a 34% higher value of x. On the other hand, higher values of H-0, as obtained by measurements in the local universe, impose an x, from the primordial nucleosynthesis calculations and current solar abundances, reduced by 37-44%.
引用
收藏
页码：210 / 216
页数：7
相关论文
共 34 条
  • [1] Planck 2013 results. XVI. Cosmological parameters
    Ade, P. A. R.
    Aghanim, N.
    Armitage-Caplan, C.
    Arnaud, M.
    Ashdown, M.
    Atrio-Barandela, F.
    Aumont, J.
    Baccigalupi, C.
    Banday, A. J.
    Barreiro, R. B.
    Bartlett, J. G.
    Battaner, E.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bobin, J.
    Bock, J. J.
    Bonaldi, A.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Bridges, M.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cappellini, B.
    Cardoso, J. -F.
    Catalano, A.
    Challinor, A.
    Chamballu, A.
    Chary, R. -R.
    Chen, X.
    Chiang, H. C.
    Chiang, L. -Y
    Christensen, P. R.
    Church, S.
    Clements, D. L.
    Colombi, S.
    Colombo, L. P. L.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    Davies, R. D.
    [J]. ASTRONOMY & ASTROPHYSICS, 2014, 571
  • [2] Aghanim N, 2018, ARXIV180706209
  • [3] AHARONIAN F, 2018, PUBL ASTRON SOC JPN, V70
  • [4] ABUNDANCES OF THE ELEMENTS - METEORITIC AND SOLAR
    ANDERS, E
    GREVESSE, N
    [J]. GEOCHIMICA ET COSMOCHIMICA ACTA, 1989, 53 (01) : 197 - 214
  • [5] Arnaud KA, 1996, ASTR SOC P, V101, P17
  • [6] The Chemical Composition of the Sun
    Asplund, Martin
    Grevesse, Nicolas
    Sauval, A. Jacques
    Scott, Pat
    [J]. ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 47, 2009, 47 : 481 - 522
  • [7] The effects of He I λ10830 on helium abundance determinations
    Aver, Erik
    Olive, Keith A.
    Skillman, Evan D.
    [J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2015, (07):
  • [8] The effect of helium sedimentation on galaxy cluster masses and scaling relations
    Bulbul, G. E.
    Hasler, N.
    Bonamente, M.
    Joy, M.
    Marrone, D.
    Miller, A.
    Mroczkowski, T.
    [J]. ASTRONOMY & ASTROPHYSICS, 2011, 533
  • [9] CAVALIERE A, 1979, ASTRON ASTROPHYS, V75, P322
  • [10] The XMM cluster outskirts project (X-COP)
    Eckert, D.
    Ettori, S.
    Pointecouteau, E.
    Molendi, S.
    Paltani, S.
    Tchernin, C.
    [J]. ASTRONOMISCHE NACHRICHTEN, 2017, 338 (2-3) : 293 - 298
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