2024RNAAS...8..118B

Query : 2024RNAAS...8..118B

2024RNAAS...8..118B - Research Notes of the AAS, 8, 118 (2024/April-0)

X-Ray Observations of the Zwicky 3146 Galaxy Cluster Reveal a 3.5 keV Excess.

BHARGAVA S., GILES P., ROMER K., JELTEMA T., HOLLOWOOD D. and HILTON M.

Abstract (from CDS):

In this note, we present spectral fits of the well-documented sloshing cool-core cluster Zwicky 3146 (z = 0.291), to test the existence of the highly speculated 3.5 keV line. We report excesses at >3σ significance at E = 3.575 keV, yielding a flux $F={8.73}_{-2.22}^{+2.17}\times {10}^{-6}$ photons cm^–2 s^–1, in XMM-Newton, and E = 3.55 keV, with a flux $F={10.0}_{-2.96}^{+3.05}\times {10}^{-6}$ photons cm^–2 s^–1 in Chandra. We explore the possibility that the 3.5 keV excess is correlated to the presence of cold gas within the cluster, based on optical and sub-mm literature analyses. Following the launch of the X-ray Imaging and Spectroscopy Mission, high resolution spectroscopy (≤7 eV) will reveal in unprecedented detail, the origin of this unidentified feature, for which Zwicky 3146 should be considered a viable target, due to the strength of the feature in two independent X-ray telescopes, opening a new window into plasma or charge exchange studies in galaxy clusters.

Journal keyword(s): Galaxy clusters - Intracluster medium - Dark matter - X-ray surveys - X-ray telescopes - Cooling flows - Charge exchange ionization

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	ZwCl 1021+0426	ClG	10 23 39.0	+04 11 14		15.6	17.95			~	297	0

Query : 2024RNAAS...8..118B

Basic data :

ZwCl 1021+0426 -- Cluster of Galaxies

Cl? (), ClG (2011ApJ,ZwCl,...), C?G (2014A&A,BLOX,...), X (RBS,RX,...), gLe (2013ApJ)

10 23 39.0 +04 11 14 [ ] E 2004A&A...423..449P

10 21 03.2 +04 26 27 [ ]

239.3996 +47.9591 [ ]

V(km/s) 74601 [~] / z(spectroscopic) 0.2894 [~] / cz 86760 [~] (Opt) C 2016ApJ...819...63R

1.0 1.0 ~ (Rad) D 2015ApJ...813...77Y

B 15.6 [~] E ~

V 17.95 [~] E ~

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`ZwCl 1021+0426`	`PSZ2 G239.43+47.95`	`XCLASS 3137`	`[RRB2014] RM J102340.7+041115.1`
`ACT-CL J1023.6+0411`	`PSZRX G239.41+47.97`	`XMMXCS J102339.8+041112.9`	`[SMG2021] CHIPS J1023+0411`
`BAX 155.9151+04.1862`	`RBS 864`	`XMMXCS J102339.7+041115.3`	`[SPD2011] 233`
`BLOX J1023.6+0411.1`	`RXC J1023.6+0411`	`ZwCl 3146`	`[WHL2009] J102339.6+041110`
`ClG 1021.1+0427`	`RX J1023.6+0411`	`ZwCl 37-19`
`MCXC J1023.6+0411`	`RX J1023.7+0411`	`[B2017] 950`
`PSZ1 G239.41+47.94`	`1RXS J102339.3+041117`	`[F81] 180`

References (297 between 1850 and 2026) (Total 297)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : ZwCl 1021+0426

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RXC J1023.6+0411 1RXS J102339.3+041117

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