Speedway

SPT-CL J0546-5345

False-color image of the SPT-CL J0546-5345 galaxy cluster
False-color image of the SPT-CL J0546-5345 galaxy cluster
Right ascension 05h 46m 37s[1]
Declination −53° 45′ 39.6″[1]
Redshift 1.067[2]
Mass 4.85 x 1014[3][4]

SPT-CL J0546-5345 is a massive galaxy cluster discovered at the South Pole Telescope in 2008 and was the first galaxy cluster discovered at > 1 using the Sunyaev–Zeldovich effect.[2][5][6][7] It is thought to be 7 billion light years away and has a redshift of = 1.067.[2]

The cluster hosts 49 galaxy members and has an estimated total mass of 4.85 x 1014 based on the Sunyaev-Zel'dovich effect.[3][4] The cluster field has a galaxy density of approximately galaxies per arcminute, according to ACS data.[3][4]

At the time of its discovery, SPT-CL J0546-5345 was the most massive galaxy cluster at > 1 until 2011 with the discovery of SPT-CL J2106-5844.[2][8] Chandra observations measured the cluster's X-ray temperature as .[1] Follow-up observations using the Spitzer, Chandra, and other optical telescopes have allowed for identification and redshift measurements of cluster members within the galaxy.

SPT-CL J0546-5345 formed early through major galaxy mergers and later experienced adiabatic expansion driven by AGN winds causing mass loss.[3]

Out of 49 cluster members, 21 were studied, with 18 of them exhibiting spectral features of Ca H & K lines while 3 displayed singly ionized oxygen (O) lines. The cluster was also found to have a velocity dispersion of km s. At the time of its discovery, SPT-CL J0546-5345 was the most dynamically active high-massive cluster identified at > 1.[2]

See also

References

  1. ^ a b c Schrabback, T; Applegate, D; Dietrich, J P; Hoekstra, H; Bocquet, S; Gonzalez, A H; von der Linden, A; McDonald, M; Morrison, C B; Raihan, S F; Allen, S W; Bayliss, M; Benson, B A; Bleem, L E; Chiu, I (2018-02-21). "Cluster mass calibration at high redshift: HST weak lensing analysis of 13 distant galaxy clusters from the South Pole Telescope Sunyaev–Zel'dovich Survey". Monthly Notices of the Royal Astronomical Society. 474 (2): 2635–2678. arXiv:1611.03866. doi:10.1093/mnras/stx2666. ISSN 0035-8711.
  2. ^ a b c d e M. Brodwin; et al. (2010). "SPT-CL J0546-5345: A Massive z>1 Galaxy Cluster Selected Via the Sunyaev-Zel'dovich Effect with the South Pole Telescope". The Astrophysical Journal. 721 (1): 90–97. arXiv:1006.5639. Bibcode:2010ApJ...721...90B. doi:10.1088/0004-637X/721/1/90. S2CID 54988474.
  3. ^ a b c d Sweet, Sarah M.; Sharp, Robert; Glazebrook, Karl; Rigaut, Francois; Carrasco, Eleazar R.; Brodwin, Mark; Bayliss, Matthew; Stalder, Brian; Abraham, Roberto; McGregor, Peter (2017-01-21). "The stellar mass–size relation for cluster galaxies at z = 1 with high angular resolution from the Gemini/GeMS multiconjugate adaptive optics system". Monthly Notices of the Royal Astronomical Society. 464 (3): 2910–2929. arXiv:1609.06054. doi:10.1093/mnras/stw2411. ISSN 0035-8711.
  4. ^ a b c Schrabback, T; Bocquet, S; Sommer, M; Zohren, H; van den Busch, J L; Hernández-Martín, B; Hoekstra, H; Raihan, S F; Schirmer, M; Applegate, D; Bayliss, M; Benson, B A; Bleem, L E; Dietrich, J P; Floyd, B (2021-08-11). "Mass calibration of distant SPT galaxy clusters through expanded weak-lensing follow-up observations with HST, VLT, & Gemini-South". Monthly Notices of the Royal Astronomical Society. 505 (3): 3923–3943. arXiv:2009.07591. doi:10.1093/mnras/stab1386. ISSN 0035-8711.
  5. ^ K. Vanderlinde; et al. (2010). "Galaxy Clusters Selected with the Sunyaev-Zel'dovich Effect from 2008 South Pole Telescope Observations". The Astrophysical Journal. 722 (2): 1180–1196. arXiv:1003.0003. Bibcode:2010ApJ...722.1180V. doi:10.1088/0004-637X/722/2/1180. S2CID 119206180.
  6. ^ F. W. High; et al. (2010). "Optical Redshift and Richness Estimates for Galaxy Clusters Selected with the Sunyaev-Zel'dovich Effect from 2008 South Pole Telescope Observations". The Astrophysical Journal. 723 (2): 1736–1747. arXiv:1003.0005. Bibcode:2010ApJ...723.1736H. doi:10.1088/0004-637X/723/2/1736. S2CID 119189086.
  7. ^ K. Andersson; et al. (2011). "X-ray Properties of the First SZE-selected Galaxy Cluster Sample from the South Pole Telescope" (PDF). The Astrophysical Journal. 738 (1): 48. arXiv:1006.3068. Bibcode:2011ApJ...738...48A. doi:10.1088/0004-637X/738/1/48. hdl:1721.1/96774. S2CID 31168807.
  8. ^ Foley, R. J.; Andersson, K.; Bazin, G.; Haan, T. de; Ruel, J.; Ade, P. A. R.; Aird, K. A.; Armstrong, R.; Ashby, M. L. N. (2011-01-06), Discovery and Cosmological Implications of SPT-CL J2106-5844, the Most Massive Known Cluster at z > 1, arXiv:1101.1286v1, doi:10.48550/arXiv.1101.1286
Preceded by Most massive
distant (z~>=1)
galaxy cluster
2008 – 2011 		Succeeded by


Quelle: https://en.wikipedia.org/wiki/SPT-CL_J0546-5345