2019A&A...629A.104G


Query : 2019A&A...629A.104G

2019A&A...629A.104G - Astronomy and Astrophysics, volume 629A, 104-104 (2019/9-1)

Sunyaev-Zel'dovich detection of the galaxy cluster Cl J1449+0856 at z = 1.99: The pressure profile in uv space.

GOBAT R., DADDI E., COOGAN R.T., LE BRUN A.M.C., BOURNAUD F., MELIN J.-B., RIECHERS D.A., SARGENT M., VALENTINO F., HWANG H.S., FINOGUENOV A. and STRAZZULLO V.

Abstract (from CDS):

We present Atacama Large Millimetre Array and Atacama Compact Array observations of the Sunyaev-Zel'dovich effect in the z=2 galaxy cluster Cl J1449+0856, an X-ray-detected progenitor of typical massive clusters in the present day Universe. While in a cleaned but otherwise untouched 92GHz map of this cluster little to no negative signal is visible, careful subtraction of known sub-millimetre emitters in the uv plane reveals a decrement at 5σ significance. The total signal is -190±36µJy, with a peak offset by 5''-9'' (∼50kpc) from both the X-ray centroid and the still-forming brightest cluster galaxy. A comparison of the recovered uv-amplitude profile of the decrement with different pressure models allows us to derive total mass constraints consistent with the ∼6 x 1013M estimated from X-ray data. Moreover, we find no strong evidence for a deviation of the pressure profile with respect to local galaxy clusters, although a slight tension at small-to-intermediate spatial scales suggests a flattened central profile, opposite to that seen in a cool core and possibly an AGN-related effect. This analysis of the lowest mass single SZ detection so far illustrates the importance of interferometers when observing the SZ effect in high-redshift clusters, the cores of which cannot be considered quiescent, such that careful subtraction of galaxy emission is necessary.

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: clusters: intracluster medium - galaxies: clusters: individual: Cl J1449+0856

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 3XLSS J021744.0-034531 ClG 02 17 44 -03 45.5           ~ 12 0
2 AzTEC J100057.20+022008.7 mm 10 00 57.2 +02 20 13           ~ 41 0
3 3C 279 Bla 12 56 11.1663795384 -05 47 21.528432492   18.01 17.75 15.87   ~ 2898 2
4 ClG J1449+0856 ClG 14 49.0 +08 56           ~ 53 0
5 [SCD2018] A4 G 14 49 13.56 +08 56 16.0           ~ 4 0
6 [SCD2018] A2 G 14 49 13.70 +08 56 22.2           ~ 6 0
7 [SDG2016] 13 G 14 49 14.05 +08 56 31.2           ~ 7 0
8 [SCD2018] A1 G 14 49 14.09 +08 56 25.3           ~ 6 0
9 [SCD2018] A5 G 14 49 14.31 +08 56 12.8           ~ 3 0
10 [SDG2016] 6 G 14 49 14.38 +08 56 16.0           ~ 7 0
11 [SCD2018] HS7 G 14 49 14.45 +08 56 23.3           ~ 6 0
12 [SCD2018] HN7 G 14 49 14.47 +08 56 23.6           ~ 6 0
13 QSO B1502+1041 Bla 15 04 24.9800240304 +10 29 39.197268420   18.97 18.56 18.94   ~ 518 1
14 QSO J1512-0906 Bla 15 12 50.5330369584 -09 05 59.830296360   16.74 16.54     ~ 1239 1

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2022.10.01-12:59:16

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