2015A&A...584L..11G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.06CEST18:49:25

2015A&A...584L..11G - Astronomy and Astrophysics, volume 584, L11-11 (2015/12-1)

A novel scenario for the possible X-ray line feature at ∼3.5 keV. Charge exchange with bare sulfur ions.

GU L., KAASTRA J., RAASSEN A.J.J., MULLEN P.D., CUMBEE R.S., LYONS D. and STANCIL P.C.

Abstract (from CDS):

Motivated by recent claims of a compelling ∼3.5keV emission line from nearby galaxies and galaxy clusters, we investigate a novel plasma model incorporating a charge exchange component obtained from theoretical scattering calculations. Fitting this kind of component with a standard thermal model yields positive residuals around 3.5keV, produced mostly by SXVI transitions from principal quantum numbers n≥9 to the ground. Such high-n states can only be populated by the charge exchange process. In this scenario, the observed 3.5keV line flux in clusters can be naturally explained by an interaction in an effective volume of ∼1kpc3 between a ∼3keV temperature plasma and cold dense clouds moving at a few hundred keV–1. The SXVI lines at ∼3.5keV also provide a unique diagnostic of the charge exchange phenomenon in hot cosmic plasmas.

Abstract Copyright:

Journal keyword(s): atomic processes - line: identification - X-rays: galaxies: clusters

Simbad objects: 4

goto Full paper

goto View the reference in ADS

Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10902 1
2 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 1939 1
3 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5824 0
4 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11533 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015A&A...584L..11G and select 'bookmark this link' or equivalent in the popup menu


2020.07.06-18:49:25

© Université de Strasbourg/CNRS

    • Contact