2001A&A...375L..14M


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET08:46:55

2001A&A...375L..14M - Astronomy and Astrophysics, volume 375, L14-17 (2001/8-3)

On the metal abundance in the core of M 87.

MOLENDI S. and GASTALDELLO F.

Abstract (from CDS):

We revisit the XMM-Newton observation of M 87 to make a new and more detailed measurement of the metal abundance profile. After having verified that spectral fits with single temperature models show a dramatic abundance drop within 1 arcmin of the cluster core, we show that more appropriate models, which include a multi-temperature component to account for the strong temperature gradient observed in M 87, and a power-law component to account for the emission of the nucleus and knot A, give a substantially flat abundance profile. The drastic abundance decrement found by fitting a single temperature component to the data is an artifact known as ``Fe-bias'' (Buote 2000MNRAS.311..176B, 2000ApJ...539..172B) following from the application of an oversimplified spectral model to the data.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies - galaxies: clusters - galaxies: individual: M 87

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5980 0
2 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6350 3

    Equat.    Gal    SGal    Ecl

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2021.03.01-08:46:55

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