2024ApJS..275...39W

Query : 2024ApJS..275...39W

2024ApJS..275...39W - Astrophys. J., Suppl. Ser., 275, 39 (2024/December-0)

X-Ray Hardening Preceding the Onset of SGR 1935+2154's Radio Pulsar Phase.

WANG P., LI J., JI L., HOU X., GUGERCINOGLU E., LI D., TORRES D.F., CHEN Y., NIU J., ZHU W.-W., ZHANG B., LIANG E.-W., ZHANG L., GE M., DAI Z., LIN L., HAN J., FENG Y., NIU C., ZHANG Y., ZHOU D., XU H., ZHANG C., JIANG J., MIAO C., YUAN M., WANG W., ZHOU D., FANG J., YUE Y., WU Y., WANG Y., WANG C., GAN Z., LI Y., SUN Z., CHI M., ZHANG J., CAO J., LU W. and WANG Y.

Abstract (from CDS):

Magnetars are neutron stars with extremely strong magnetic fields, frequently powering high-energy activity in X-rays. Pulsed radio emission following some X-ray outbursts has been detected, albeit its physical origin is unclear. It has long been speculated that the origin of magnetars' radio signals is different from those from canonical pulsars, although convincing evidence is still lacking. Five months after magnetar SGR 1935+2154's X-ray outburst and its associated fast radio burst 20200428, a radio pulsar phase was discovered. Here we report the discovery of X-ray spectral hardening associated with the emergence of periodic radio pulsations from SGR 1935+2154 and a detailed analysis of the properties of the radio pulses. The observations suggest that radio emission originates from the outer magnetosphere of the magnetar, and the surface heating due to the bombardment of inward-going particles from the radio emission region is responsible for the observed X-ray spectral hardening.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Magnetars

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 14

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Number of rows : 14
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 FRB 20201124A rB 05 07 57.600 +26 11 24.00           ~ 307 0
2 FRB 20181119D rB 05 31 58.6980 +33 08 52.588           ~ 933 0
3 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
4 PSR B0950+08 Psr 09 53 09.31210 +07 55 36.9000           ~ 806 2
5 PSR J1550-5418 Psr 15 50 54.18 -54 18 23.9           ~ 463 1
6 FRB 20190520B rB 16 02 04.270 -11 17 17.32           ~ 211 0
7 PSR J1622-4950 Psr 16 22 44.80000 -49 50 54.5000           ~ 169 0
8 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
9 PSR J1745-2900 Psr 17 45 40.1640 -29 00 29.818           ~ 358 0
10 AX J1809.8-1943 Psr 18 09 51.07 -19 43 51.8           ~ 532 0
11 SWIFT J1818.0-1607 N* 18 18 00.23 -16 07 53.0           ~ 109 0
12 NAME Sgr 1935+2154 * 19 34 55.68 +21 53 48.2           ~ 820 1
13 SNR G057.2+00.8 SNR 19 35.0 +21 57           ~ 119 0
14 FRB 200428 rB 19 35.0 +21 57           ~ 291 0

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