2022ApJ...931L...3N

Query : 2022ApJ...931L...3N

2022ApJ...931L...3N - Astrophys. J., 931, L3-L3 (2022/May-3)

Is the Black-widow Pulsar PSR J1555-2908 in a Hierarchical Triple System?.

NIEDER L., KERR M., CLARK C.J., BRUEL P., CROMARTIE H.T., RANSOM S.M. and RAY P.S.

Abstract (from CDS):

The 559 Hz black-widow pulsar PSR J1555-2908, originally discovered in radio, is also a bright gamma-ray pulsar. Timing its pulsations using 12 yr of Fermi-Large Area Telescope gamma-ray data reveals long-term variations in its spin frequency that are much larger than is observed from other millisecond pulsars. While this variability in the pulsar rotation rate could be intrinsic "timing noise," here we consider an alternative explanation: the variations arise from the presence of a very-low-mass third object in a wide multiyear orbit around the neutron star and its low-mass companion. With current data, this hierarchical-triple-system model describes the pulsar's rotation slightly more accurately than the best-fitting timing noise model. Future observations will show if this alternative explanation is correct.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gamma-ray sources - Millisecond pulsars - Pulsar planets - Pulsar timing method

Simbad objects: 12

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Number of rows : 12
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 PSR J0030+0451 Psr 00 30 27.42348 +04 51 39.7144           ~ 596 1
2 PSR J0337+1715 Psr 03 37 43.8210968640 +17 15 14.886499572           ~ 113 0
3 PSR J1025-07 Psr 10 24 38.6991893112 -07 19 19.045523388     19.81 18.78 18.00 ~ 286 1
4 PSR B1257+12 Psr 13 00 03.1075 +12 40 55.155           ~ 546 1
5 PSR J1555-2908 Psr 15 55 40.6585535732 -29 08 28.423239347           ~ 37 0
6 PSR B1620-26 Psr 16 23 38.2218 -26 31 53.769     21.30     ~ 318 2
7 PSR J1643-1224 Psr 16 43 38.16612 -12 24 58.6334           ~ 260 2
8 PSR J1747-4036 Psr 17 47 48.715690 -40 36 54.79950           ~ 83 0
9 PSR J1824-2452A Psr 18 24 32.009 -24 52 11.10           ~ 529 2
10 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
11 PSR B1937+21.4 Psr 19 39 38.560096 +21 34 59.13552           ~ 1142 0
12 PSR J2317+1439 Psr 23 17 09.235606 +14 39 31.29559           ~ 211 1

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