2022A&A...661A..31M


Query : 2022A&A...661A..31M

2022A&A...661A..31M - Astronomy and Astrophysics, volume 661A, 31-31 (2022/5-1)

A global view of shocked plasma in the supernova remnant Puppis A provided by SRG/eROSITA.

MAYER M.G.F., BECKER W., PREDEHL P., SASAKI M. and FREYBERG M.

Abstract (from CDS):


Context. Puppis A is a medium-age supernova remnant (SNR), which is visible as a very bright extended X-ray source. While numerous studies have investigated individual features of the SNR, at this time, no comprehensive study of the entirety of its X-ray emission exists.
Aims. Using field-scan data acquired by the SRG/eROSITA telescope during its calibration and performance verification phase, we aim to investigate the physical conditions of shocked plasma and the distribution of elements throughout Puppis A. In doing so, we take advantage of the uniform target coverage, excellent statistics, and decent spatial and spectral resolution of our data set.
Methods. Using broad- and narrow-band imaging, we investigate the large-scale distribution of absorption and the plasma temperature as well as that of typical emission lines. This approach is complemented by a spatially resolved spectral analysis of the shocked plasma in Puppis A, for which we divided the SNR into around 700 distinct regions, resulting in maps of key physical quantities over its extent.
Results. We find a strong peak of foreground absorption in the southwest quadrant, which in conjunction with high temperatures at the northeast rim creates the well-known strip of hard emission crossing Puppis A. Furthermore, using the observed distribution of ionization ages, we attempt to reconstruct the age of the shock in the individual regions. We find a rather recent shock interaction for the prominent northeast filament and ejecta knot, as well as for the outer edge of the bright eastern knot. Finally, elemental abundance maps reveal only a single clear enhancement of the plasma with ejecta material, consistent with a previously identified region, and no obvious ejecta enrichment in the remainder of the SNR. Within this region, we confirm the spatial separation of silicon-rich ejecta from those dominated by lighter elements. The apparent elemental composition of this ejecta-rich region would imply an unrealistically large silicon-to-oxygen ratio when compared to the integrated yield of a core-collapse supernova. In reality, both the observed ejecta composition and their apparent distribution may be biased by the unknown location and strength of the reverse shock.

Abstract Copyright: © M. G. F. Mayer et al. 2022

Journal keyword(s): X-rays: individuals: Puppis A - ISM: supernova remnants - ISM: abundances - stars: neutron

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1135 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16153 1
3 SNR J052559-660453 SNR 05 26 00.4 -66 05 02     12.71     ~ 424 2
4 RX J0822.0-4300 X 08 22 27.00 -43 10 27.0           ~ 38 1
5 NAME Pup A SNR 08 24 07 -42 59.8           ~ 562 1
6 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1173 2
7 AJG 44 Psr 16 17 33.000 -51 02 00.00           ~ 484 3
8 NAME Kepler SNR Rad 17 30 35.976 -21 28 56.23           ~ 757 4
9 NAME Cas A SNR 23 23 24.000 +58 48 54.00     14.30     ~ 2619 1

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2022.08.09-15:24:19

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