2024PASJ...76..523Y

Query : 2024PASJ...76..523Y

2024PASJ...76..523Y - Publ. Astron. Soc. Jap., 76, 523-527 (2024/June-0)

Suzaku observation of an iron K-shell line in the spiral galaxy NGC 6946.

YAMAUCHI S., INABA A. and ANRAKU Y.

Abstract (from CDS):

An emission line at ∼6.7 keV is attributable to an He-like iron K-shell transition, which indicates existence of a thin thermal plasma with a temperature of several keV. Using Suzaku archival data, we searched for the iron K-line from the spiral galaxy NGC 6946, and found it at 6.68 ± 0.07 keV at the 3.1σ level in the central $r\le {2.^{\prime }5}$ region. The iron line luminosity from the central region was estimated to be (2.3 ± 1.2) × 1037 erg s–1 at a distance of 5.5 Mpc. The origin of the iron emission line is discussed.

Abstract Copyright: © The Author(s) 2024. Published by Oxford University Press on behalf of the Astronomical Society of Japan.

Journal keyword(s): galaxies: individual (NGC 6946) - X-rays: galaxies - X-rays: ISM

Simbad objects: 5

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Number of rows : 5
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 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
2 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
3 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
4 NAME NGC 6946 SNR SNR 20 35 00.74 +60 11 30.6           ~ 117 0
5 NAME Galactic Ridge ? ~ ~           ~ 543 1

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