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Dissecting the region of 3EG J1837-0423 and HESS J1841-055 with INTEGRAL

Dissecting the region of 3EG J1837-0423 and HESS J1841-055 with INTEGRAL
Dissecting the region of 3EG J1837-0423 and HESS J1841-055 with INTEGRAL
3EG J1837-0423 and HESS J1841-055 are two unidentified and peculiar high-energy sources located in the same region of the sky, separated by ~1.4°. Specifically, 3EG J1837-0423 is a transient MeV object detected by EGRET only once during flaring activity that lasted a few days while HESS J1841-055 is a highly extended TeV source. We attempted to match the high-energy emission from the unidentified sources 3EG J1837-0423 and HESS J1841-055 with X-rays (4-20 keV) and soft ?-rays (20-100 keV) candidate counterparts detected through deep International Gamma-Ray Astrophysics Laboratory observations of the sky region. As a result we propose the Supergiant Fast X-ray Transient (SFXT) AX J1841.0-0536 as a possible candidate counterpart of 3EG J1837-0423, based on spatial proximity and transient behavior. Alternatively, AX J1841.0-0536 could be responsible for at least a fraction of the entire TeV emission from the extended source HESS J1841-055, based on a striking spatial correlation. In either case, the proposed association is also supported from an energetic standpoint by a theoretical scenario where AX J1841.0-0536 is a low magnetized pulsar which, due to accretion of massive clumps from the supergiant companion donor star, undergoes sporadic changes to transient Atoll-states where a magnetic tower can produce transient jets and as a consequence high-energy emission. In either case (by association with 3EG J1837-0423 or alternatively with HESS J1841-055), AX J1841.0-0536 might be the prototype of a new class of Galactic transient MeV/TeV emitters.
gamma rays: observations, gamma rays: theory, x-rays: binaries
0004-637X
1194
Sguera, V.
371bb568-7e56-496e-a624-dba6de79d9e1
Romero, G.E.
d6814b7b-a1aa-4a20-a9e5-9584e9c3d5ef
Bazzano, A.
8eef0c6e-1a5f-4bcd-a034-9a5c3b29104d
Masetti, N.
78166fad-2a82-4de5-9359-25706c0a6e2f
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32
Bassani, L.
07e5602c-f97e-4334-a0fa-c2212431a61a
Sguera, V.
371bb568-7e56-496e-a624-dba6de79d9e1
Romero, G.E.
d6814b7b-a1aa-4a20-a9e5-9584e9c3d5ef
Bazzano, A.
8eef0c6e-1a5f-4bcd-a034-9a5c3b29104d
Masetti, N.
78166fad-2a82-4de5-9359-25706c0a6e2f
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32
Bassani, L.
07e5602c-f97e-4334-a0fa-c2212431a61a

Sguera, V., Romero, G.E., Bazzano, A., Masetti, N., Bird, A.J. and Bassani, L. (2009) Dissecting the region of 3EG J1837-0423 and HESS J1841-055 with INTEGRAL. Astrophysical Journal, 697 (2), 1194. (doi:10.1088/0004-637X/697/2/1194).

Record type: Article

Abstract

3EG J1837-0423 and HESS J1841-055 are two unidentified and peculiar high-energy sources located in the same region of the sky, separated by ~1.4°. Specifically, 3EG J1837-0423 is a transient MeV object detected by EGRET only once during flaring activity that lasted a few days while HESS J1841-055 is a highly extended TeV source. We attempted to match the high-energy emission from the unidentified sources 3EG J1837-0423 and HESS J1841-055 with X-rays (4-20 keV) and soft ?-rays (20-100 keV) candidate counterparts detected through deep International Gamma-Ray Astrophysics Laboratory observations of the sky region. As a result we propose the Supergiant Fast X-ray Transient (SFXT) AX J1841.0-0536 as a possible candidate counterpart of 3EG J1837-0423, based on spatial proximity and transient behavior. Alternatively, AX J1841.0-0536 could be responsible for at least a fraction of the entire TeV emission from the extended source HESS J1841-055, based on a striking spatial correlation. In either case, the proposed association is also supported from an energetic standpoint by a theoretical scenario where AX J1841.0-0536 is a low magnetized pulsar which, due to accretion of massive clumps from the supergiant companion donor star, undergoes sporadic changes to transient Atoll-states where a magnetic tower can produce transient jets and as a consequence high-energy emission. In either case (by association with 3EG J1837-0423 or alternatively with HESS J1841-055), AX J1841.0-0536 might be the prototype of a new class of Galactic transient MeV/TeV emitters.

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More information

Published date: 1 June 2009
Keywords: gamma rays: observations, gamma rays: theory, x-rays: binaries

Identifiers

Local EPrints ID: 144777
URI: http://eprints.soton.ac.uk/id/eprint/144777
ISSN: 0004-637X
PURE UUID: b7113946-9615-4e62-8195-2ebfe1f6eb5a
ORCID for A.J. Bird: ORCID iD orcid.org/0000-0002-6888-8937

Catalogue record

Date deposited: 24 May 2010 15:31
Last modified: 09 Nov 2021 02:44

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Contributors

Author: V. Sguera
Author: G.E. Romero
Author: A. Bazzano
Author: N. Masetti
Author: A.J. Bird ORCID iD
Author: L. Bassani

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