2023NatAs...7..451C

Query : 2023NatAs...7..451C

2023NatAs...7..451C - Nature Astronomy, 7, 451-462 (2023/April-0)

Neutron star mass estimates from gamma-ray eclipses in spider millisecond pulsar binaries.

CLARK C.J., KERR M., BARR E.D., BHATTACHARYYA B., BRETON R.P., BRUEL P., CAMILO F., CHEN W., COGNARD I., CROMARTIE H.T., DENEVA J., DHILLON V.S., GUILLEMOT L., KENNEDY M.R., KRAMER M., LYNE A.G., MATA SANCHEZ D., NIEDER L., PHILLIPS C., RANSOM S.M., RAY P.S., ROBERTS M.S.E., ROY J., SMITH D.A., SPIEWAK R., STAPPERS B.W., TABASSUM S., THEUREAU G. and VOISIN G.

Abstract (from CDS):

Reliable neutron star mass measurements are key to determining the equation of state of cold nuclear matter, but such measurements are rare. Black widows and redbacks are compact binaries consisting of millisecond pulsars and semi-degenerate companion stars. Spectroscopy of the optically bright companions can determine their radial velocities, providing inclination-dependent pulsar mass estimates. Although inclinations can be inferred from subtle features in optical light curves, such estimates may be systematically biased due to incomplete heating models and poorly understood variability. Using data from the Fermi Large Area Telescope, we have searched for gamma-ray eclipses from 49 spider systems, discovering significant eclipses in 7 systems, including the prototypical black widow PSR B1957+20. Gamma-ray eclipses require direct occultation of the pulsar by the companion, and so the detection, or significant exclusion, of a gamma-ray eclipse strictly limits the binary inclination angle, providing new robust, model-independent pulsar mass constraints. For PSR B1957+20, the eclipse implies a much lighter pulsar (1.81 ± 0.07 solar masses) than inferred from optical light curve modelling.

Abstract Copyright: ©

Journal keyword(s): Astrophysics - High Energy Astrophysical Phenomena

Simbad objects: 50

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Number of rows : 50
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 J0023+0923 Psr 00 23 16.890 +09 23 24.18           ~ 137 0
2 1FGL J0212.3+5319 EB* 02 12 10.4774318712 +53 21 38.778250464   15.213 14.677 14.286   ~ 58 0
3 PSR J0251+2606 Psr 02 51 02.5204468 +26 06 09.937134           ~ 39 0
4 2FGL J0312.5-0914 gam 03 12 06.2 -09 21 56           ~ 39 0
5 1FGL J0334.2+7501 Psr 03 36 06.0 +75 03 00           ~ 30 0
6 SWIFT J0428.2-6704A LXB 04 27 49.6119608221 -67 04 35.066804919           ~ 76 1
7 PSO J080.8044-25.5318 G 05 23 13.0748610986 -25 31 54.492620030           ~ 56 0
8 PSR J0610-2100 Psr 06 10 13.602953 -21 00 27.74435           ~ 116 0
9 PSR J0636+5129 Psr 06 36 04.84645 +51 28 59.9625           ~ 101 0
10 PSR J0838-2827 Psr 08 38 30.15 -28 25 55.5           ~ 49 0
11 2MASX J09432407-7620101 Bz? 09 43 24.02882 -76 20 10.3613   19       ~ 57 1
12 PSR J0952-0607 Psr 09 52 08.319 -06 07 23.49           ~ 103 0
13 CRTS J095527.8-394752 CV* 09 55 27.8212296096 -39 47 52.391744160     18.45     ~ 41 0
14 PSR J1023+0038 Psr 10 23 47.6841824712 +00 38 41.005893516     17.31     GV 470 0
15 PSR J1048+2339 Psr 10 48 43.4339582160 +23 39 53.577436140     19.47     ~ 82 0
16 PSR J1124-36 Psr 11 24 01.1169434 -36 53 19.108887           ~ 63 0
17 XSS J12270-4859 Psr 12 27 58.7476831464 -48 53 42.824592960           ~ 321 0
18 PSR J1301+0833 Psr 13 01 38.26 +08 33 57.5           ~ 56 0
19 PSR J1311-3430 Psr 13 11 45.7292612136 -34 30 30.294149760   21.0   18.8   ~ 181 1
20 PSR J1431-4715 Psr 14 31 44.6313693632 -47 15 27.399549133           ~ 49 0
21 PSR J1446-4701 Psr 14 46 35.709721 -47 01 26.79678           ~ 82 1
22 PSR J1513-2550 Psr 15 13 23.32059 -25 50 31.2850           ~ 35 0
23 PSR J1544+4937 Psr 15 44 04.166 +49 37 57.45           ~ 89 1
24 PSR J1555-2908 Psr 15 55 40.6585535732 -29 08 28.423239347           ~ 37 0
25 PSR J1622-0315 Psr 16 22 59.6408643864 -03 15 37.303251262           ~ 48 0
26 PSR J1628-3205 Psr 16 28 07.0056152 -32 05 48.966980           ~ 66 0
27 PSR J1641+8049 Psr 16 41 20.843 +80 49 52.90           ~ 36 0
28 PSR J1653-0158 Psr 16 53 38.0717183664 -01 58 36.843092004   20.4   19.4   ~ 102 0
29 PSR J1745+1017 Psr 17 45 33.8371 +10 17 52.523           ~ 70 0
30 PSR J1805+0615 Psr 18 05 42.3999024 +06 15 18.359184           ~ 33 0
31 PSR J1810+17 Psr 18 10 37.2791131488 +17 44 37.425884136           ~ 147 1
32 PSR J1816+4510 Psr 18 16 35.9342957160 +45 10 33.917516328           ~ 126 0
33 PSR J1833-3840 Psr 18 33 04.58231 -38 40 46.0720           ~ 20 0
34 PSR J1908+2105 Psr 19 09 32.0 +21 02 56           ~ 30 0
35 PSR J1946-5403 Psr 19 46 34.4933990 -54 03 42.558670           ~ 45 0
36 PSR J1959+2048 Psr 19 59 36.7643141520 +20 48 14.896407996   21.08 20.16 19.53 18.79 G: 854 3
37 PSR J2017-1614 Psr 20 17 45.12 -16 18 21.1           ~ 40 1
38 PSR J2039-5617 Psr 20 39 34.9609502672 -56 17 09.033104197           ~ 84 0
39 PSR J2047+1053 Psr 20 47 00.000 +10 53 00.00           ~ 47 0
40 V* LY Aqr Psr 20 51 07.52058 -08 27 37.6100           ~ 236 2
41 PSR J2052+1219 Psr 20 52 47.77844 +12 19 59.0281           ~ 42 0
42 PSR J2115+5448 Psr 21 15 11.7678 +54 48 45.154           ~ 30 0
43 PSR J2129-04 Psr 21 29 45.0469239408 -04 29 06.973600236     16.68     ~ 100 0
44 PSR J2214+3000 Psr 22 14 38.8480 +30 00 38.209           ~ 136 0
45 PSR J2215+51 Psr 22 15 32.6869149432 +51 35 36.400854912           ~ 176 0
46 PSR J2234+0944 Psr 22 34 46.856913 +09 44 30.04150           ~ 82 0
47 PSR J2241-5236 Psr 22 41 42.03161 -52 36 36.2492           ~ 143 1
48 PSR J2256-1024 Psr 22 56 56.390 -10 24 34.37           ~ 88 0
49 PSR J2333-5526 Psr 23 33 08.6 -55 27 50           ~ 32 0
50 PSR J2339-0533 Psr 23 39 38.7412778376 -05 33 05.108592528     18.48     ~ 149 0

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