2012A&A...539A.101S


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.05CET16:15:23

2012A&A...539A.101S - Astronomy and Astrophysics, volume 539A, 101-101 (2012/3-1)

Constraints on the non-thermal emission from η Carinae's blast wave of 1843.

SKILTON J.L., DOMAINKO W., HINTON J.A., JONES D.I., OHM S. and URQUHART J.S.

Abstract (from CDS):

Non-thermal hard X-ray and high-energy (HE; 1MeV<E<100GeV) γ-ray emission in the direction of η Carinae has been recently detected using the INTEGRAL, AGILE and Fermi satellites. This emission has been interpreted either in the framework of particle acceleration in the colliding wind region between the two massive stars or in the very fast moving blast wave which originates in the historical 1843 ``great eruption''. Archival Chandra data has been reanalysed to search for signatures of particle acceleration in η Carinae's blast wave. No shell-like structure could be detected in hard X-rays and a limit has been placed on the non-thermal X-ray emission from the shell. The time dependence of the target radiation field of the Homunculus is used to develop a single zone model for the blast wave. Attempting to reconcile the X-ray limit with the HE γ-ray emission using this model leads to a very hard electron injection spectrum dN/dE ∝E–Γ with Γ<1.8, harder than the canonical value expected from diffusive shock acceleration.

Abstract Copyright:

Journal keyword(s): acceleration of particles - X-rays: stars - binaries: general - gamma rays: stars - stars: individual: η Carinae

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 - 2021
#notes
1 NAME Homunculus Nebula ISM 10 45 03.5 -59 41 04           ~ 327 1
2 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2233 0
3 Cl Trumpler 16 OpC 10 45 10 -59 43.0   5.35 5.0     ~ 433 0
4 ESO 134-11 HII 14 40 29 -62 38.7           ~ 510 1
5 NAME Lupus SN SNR 15 02 22.1 -42 05 49           ~ 1219 1

    Equat.    Gal    SGal    Ecl

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2020.12.05-16:15:23

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