2026ApJ...997..217A

Query : 2026ApJ...997..217A

2026ApJ...997..217A - Astrophys. J., 997, 217 (2026/February-1)

Evidence of an Energetic Magnetar Powering 1LHAASO J0500+4454.

ALFORD J.A.J., GELFAND J.D., ABDELMAGUID M. and SLANE P.

Abstract (from CDS):

We investigate the origin of the unidentified, extended TeV source 1LHAASO J0500+4454, considering three possible origins: cosmic rays interacting with a molecular cloud (MC), particles accelerated in a currently undetected supernova remnant (SNR), and an energetic outflow powered by a pulsar. Upper limits on the CO and X-ray emission from the γ-ray emitting region disfavor the MC and SNR scenarios, respectively. If a nebula of inverse Compton scattering e±powers 1LHAASO J0500+4454, then spectral energy distribution modeling indicates that the current particle energy in the nebula is ∼4 × 1048 erg. If the coincident magnetar SGR 0501+4516's rotational energy powered 1LHAASO J0500+4454, then a conservative energy budget calculation requires an initial magnetar spin period P0 ≲ 5 ms and a spin-down timescale τsd ≲ 30 yr, which has implications for the origins of magnetars.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gamma-ray sources - Magnetars - Pulsar wind nebulae - Pulsars - Supernovae

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
2 PSR J0454+45 Psr 04 54 59.310 +45 29 46.70           ~ 8 0
3 SNR G160.8+02.6 SNR 05 01 00.000 +46 40 00.00           ~ 233 0
4 PSR J0501+4516 Psr 05 01 06.600 +45 16 33.96           ~ 142 0
5 4FGL J0501.7+4459 gam 05 01 45.5 +44 59 30           ~ 4 0
6 PSR B0458+46 Psr 05 02 04.561 +46 54 06.09           ~ 96 0
7 PSR B0525-66 Psr 05 26 00.7 -66 04 35           ~ 569 1
8 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
9 PSR J0633+1746 Psr 06 33 54.153 +17 46 12.91           ~ 1308 0
10 PSR B0656+14 Psr 06 59 48.18800 +14 14 19.2000   24.85 24.90     ~ 943 1
11 SNR G348.7+00.3 SNR 17 13 43.0 -38 10 12           ~ 134 2
12 HESS J1713-381 gam 17 13 51.20353 -38 13 13.5700           ~ 33 1
13 [AAB2008] 1 X 17 14 05.7 -38 10 31           ~ 69 1
14 Fermi J1808.2-2029 gam 18 08 00.0 -20 24 00           ~ 20 0
15 PSR J1808-2024 Psr 18 08 39.32 -20 24 40.1           ~ 1316 2
16 HESS J1834-097 gam 18 34 -09.7           ~ 1 0
17 XMMU J183435.3-084443 X 18 34 35.32 -08 44 43.8           ~ 10 0
18 SNR G023.3-00.3 SNR 18 34 51.80 -08 44 38.2           ~ 240 0
19 PSR J1834-0845 Psr 18 34 52.1 -08 45 56           ~ 98 0
20 PSR J1841-0456 Psr 18 41 19.29 -04 56 11.4           ~ 296 1
21 SNR G029.7-00.3 SNR 18 46 22.8 -02 59 47           ~ 375 2
22 PSR J1846-0258 Psr 18 46 24.75 -02 58 29.6           ~ 388 2
23 GBS 1900+14 gB 19 07 13 +09 19.6           ~ 906 0
24 2E 4673 HXB 23 01 08.14 +58 52 44.5           ~ 673 1

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