2025A&A...700A.248Z

Query : 2025A&A...700A.248Z

2025A&A...700A.248Z - Astronomy and Astrophysics, volume 700A248 (2025/8-1)

Imaging-spectroscopy diagnosis of the giant sloshing spiral in the Virgo cluster with the Einstein Probe Follow-up X-ray Telescope.

ZHENG X., JIA S., LI C., CHEN Y., YU H., FENG H., XU D., LIU A., SONG L., LIU C., LU F., ZHANG S., YUAN W., SANDERS J., WANG J., CHEN T., CUI C., CUI W., FENG W., GAO N., GUAN J., HAN D., HOU D., HU H., HUANG M., HUO J., JIN C., LI M., LI W., LIU Y., LUO L., MA J., OU G., PAN H., WANG H., WANG J., WANG J., WANG Y., XU J., XU Y., YANG X., YANG Y., ZHANG H., ZHANG J., ZHANG M., ZHANG Z., ZHAO H., ZHAO X., ZHAO Z., ZHU P. and ZHU Y.

Abstract (from CDS):

We performed deep X-ray observations of the Virgo cluster using the Einstein Probe Follow-up X-ray Telescope (EP-FXT) with a total exposure of 295 ks. Taking advantage of the large field of view (FoV) and low particle background of EP-FXT, the image reveals a giant spiral feature connecting the cold fronts in the northwest and southeast, forming a coherent structure consistent with previous XMM-Newton and Suzaku findings. Furthermore, we present two-dimensional maps of the temperature, metallicity, and entropy in the Virgo cluster that cover a FoV of approximately 28.5'. These maps clearly depict a spiral structure that is characterized by high density, low temperature, high metallicity, and low entropy. These results support the scenario in which the spiral morphology originates from gas sloshing that is induced by a minor merger. In addition, the temperatures measured with EP-FXT are reasonably consistent with those obtained from XMM-Newton within the uncertainties.

Abstract Copyright: © The Authors 2025

Journal keyword(s): Galaxy: structure - galaxies: clusters: intracluster medium - galaxies: structure

Simbad objects: 13

Full paper

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Number of rows : 13

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag I	Sp type	#ref 1850 - 2026	#notes
1	ACO 426	ClG	03 19 47.6	+41 30 54					~	2508	1
2	ACO 496	ClG	04 33 40.8	-13 14 34					~	728	2
3	ACO 795	ClG	09 24 11.26	+14 09 03.5					~	120	0
4	NAME Virgo Cluster	ClG	12 30 47.8	+12 23 07					~	7107	0
5	M 87	AGN	12 30 49.42338414	+12 23 28.0436859	10.16	9.59	8.63	7.49	~	7815	3
6	ACO 3526	ClG	12 48 49.2	-41 18 17					~	1154	2
7	ACO 1775	ClG	13 41 50.60	+26 21 10.6					~	324	0
8	ACO 2029	ClG	15 10 54.2	+05 44 23					~	1020	0
9	ACO 2052	ClG	15 16 41.64	+07 01 45.5					~	756	1
10	ACO 2566	ClG	23 16 03.2	-20 27 41					~	50	0
11	Z 532-11	BiC	23 18 38.2641503880	+42 57 28.797497604		15.3			~	41	1
12	NGC 7618	GiG	23 19 47.2346536992	+42 51 09.228387528		14.3			~	72	2
13	ACO 2657	ClG	23 44 51.0	+09 08 40					~	280	3

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