2010A&A...520A..76A


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.18CEST09:36:55

2010A&A...520A..76A - Astronomy and Astrophysics, volume 520, A76-76 (2010/9-2)

Constraining compactness and magnetic field geometry of X-ray pulsars from the statistics of their pulse profiles.

ANNALA M. and POUTANEN J.

Abstract (from CDS):

The light curves observed from X-ray pulsars and magnetars reflect the radiation emission pattern, the geometry of the magnetic field, and the neutron star compactness. We study the statistics of X-ray pulse profiles in order to constrain the neutron star compactness and the magnetic field geometry. We collect the data for 124 X-ray pulsars, which are mainly in high-mass X-ray binary systems, and classify their pulse profiles according to the number of observed peaks seen during one spin period, dividing them into two classes, single- and double-peaked. We find that the pulsars are distributed about equally between both groups. We also compute the probabilities predicted by the theoretical models of two antipodal point-like spots that emit radiation according to the pencil-like emission patterns. These are then compared to the observed fraction of pulsars in the two classes. Assuming a blackbody emission pattern, it is possible to constrain the neutron star compactness if the magnetic dipole has arbitrary inclinations to the pulsar rotational axis. More realistic pencil-beam patterns predict that 79% of the pulsars are double-peaked independently of their compactness. The theoretical predictions can be made consistent with the data if the magnetic dipole inclination to the rotational axis has an upper limit of 40°±4°. We also discuss the effect of limited sensitivity of the X-ray instruments to detect weak pulses, which lowers the number of detected double-peaked profiles and makes the theoretical predictions to be consistent with the data even if the magnetic dipole does have random inclinations. This shows that the statistics of pulse profiles does not allow us to constrain the neutron star compactness. In contrast to the previous claims by Bulik et al. (2003A&A...404.1023B), the data also do not require the magnetic inclination to be confined in a narrow interval.

Abstract Copyright:

Journal keyword(s): methods: statistical - pulsars: general - stars: neutron - X-rays: binaries

Simbad objects: 125

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Number of rows : 125

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10562 1
2 [MA93] 172 HXB 00 47 23.3377530166 -73 12 27.369187063   15.85 15.85   16.00 B1-B1.5V 49 0
3 RX J0049.0-7250 HXB 00 49 03.3 -72 50 52   17.01 16.92   16.68 B3:V 47 0
4 RX J0049.2-7311 HXB 00 49 13.6245604462 -73 11 37.870502830   16.52 16.51   16.21 B1e 44 1
5 LIN 139 HXB 00 49 42.0074565521 -73 23 14.677257632 14.09 15.00 14.98   14.70 O9.5-B0.5III-V 65 0
6 V* DZ Tuc HXB 00 50 44.7076463726 -73 16 05.432580504 14.46 15.37 15.44   15.31 B0-B0.5V 69 0
7 [MA93] 413 HXB 00 50 56.9990778492 -72 13 34.583571609   14.97 15.05     B0.5III-V 54 0
8 SXP 4.78 HXB 00 51 38.7739800334 -72 17 04.797056212 14.63 15.66 15.63   15.44 B0V-B1Ve 34 0
9 LIN 193 HXB 00 51 52.0247273096 -73 10 34.142453336 13.39 14.38 14.45 14.24 14.28 O9.5-B0V 68 0
10 AzV 102 HXB 00 51 53.1358268638 -72 31 48.721856328 13.66 14.79 14.38   14.40 B0-5(II) 67 0
11 LIN 198 HXB 00 52 05.6254079356 -72 26 04.230639207 13.86 14.91 14.91 14.91   B0-5(II)e 117 0
12 SXP 82.4 HXB 00 52 08.9597026315 -72 38 03.308947558 14.33 15.15 15.23   14.83 B1-5(II)e 34 0
13 LIN 203 HXB 00 52 13.9960952088 -73 19 18.814054598   14.66 14.67   14.534 O9.5IIIe/B0Ve 72 0
14 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9089 1
15 LIN 221 HXB 00 52 55.2649519816 -71 58 06.288816422 14.37 15.47 15.53   15.34 B0-B1III-V 47 0
16 RX J0053.4-7227 HXB 00 53 23.8588224453 -72 27 15.446832856 15.06 16.11 16.19   16.14 B1-B2IV-V 28 0
17 SXP 95.2 HXB 00 53 26.4 -72 49 16           ~ 16 1
18 RX J0053.9-7226 HXB 00 53 55.181 -72 26 44.88   14.65 14.72     B1III 82 0
19 X SMC X-2 HXB 00 54 33.43 -73 41 01.3 13.77 16.40 16.38   14.67 O9.5III-V 105 0
20 LIN 268 HXB 00 54 55.8842919896 -72 45 10.956178546 13.83 14.73 15.0 14.73   B1e 44 0
21 [MA93] 810 HXB 00 54 56.1753852837 -72 26 47.860478480 14.17 15.24 15.28   15.11 O9V 65 0
22 RX J0055.2-7238 HXB 00 55 18.436 -72 38 51.85   16.02 15.87     O9.5V 33 0
23 RX J0055.4-7210 HXB 00 55 27.746 -72 10 58.74   16.66 16.78     B2-B3IV-V 31 2
24 [MA93] 904 HXB 00 56 05.5342353201 -72 21 59.448671305   15.84 15.88     B1V 30 0
25 RX J0057.4-7325 HXB 00 57 27.000 -73 25 19.55 14.56 15.62 15.67 15.43 15.67 B3-B5Ib-II? 32 0
26 [MA93] 1020 HXB 00 57 36.0156494976 -72 19 34.057560848 14.89 15.95 15.97 15.79 15.791 B0/4e 38 0
27 [MA93] 1036 HXB 00 57 49.5743958452 -72 02 35.873771227   15.52 15.64     B0-B2III-V 52 0
28 [MA93] 1038 HXB 00 57 50.3832156922 -72 07 56.133951497 14.63 15.64 15.69   15.47 B1-2(Be-Fe) 39 0
29 RX J0059.2-7138 HXB 00 59 12.7444160995 -71 38 44.962593751   14.07 14.01 14.36   B1-B1.5II-III 78 0
30 SXP 202 HXB 00 59 21.0392917410 -72 23 17.304931904 13.81 14.96 14.97   15.07 B0-B1V 37 0
31 PSR J0100-7211 Psr 01 00 42.86 -72 11 33.3   17.69 17.82     B3V 84 0
32 [MA93] 1240 HXB 01 01 02.8879875982 -72 06 58.964896307   15.68 15.72 15.52   B0-B2III-V 43 0
33 [MA93] 1257 HXB 01 01 20.6637174159 -72 11 18.966252559 14.41 15.36 15.49   15.53 B0.5-B2IV-V 45 0
34 SXP 6.85 HXB 01 02 53.3181214914 -72 44 35.166325803   14.51 14.59     O9.5-B0IV-V 54 0
35 [MA93] 1367 HXB 01 03 13.9174859851 -72 09 14.259395723   14.70 14.79 15.0   B0.5IV-V 84 2
36 [MA93] 1393 HXB 01 03 37.5346803264 -72 01 33.205470837   14.54 14.65     B0III-V 52 0
37 RX J0111.2-7317 HXB 01 11 08.5772485083 -73 16 46.307693953 14.40 15.42 15.52   15.29 B0.5-1Ve 70 0
38 SK 160 HXB 01 17 05.1447530244 -73 26 36.015353425 12.23 13.00 13.15   13.17 O9.7Ia+ 783 0
39 [MA93] 1845 HXB 01 17 40.1628070528 -73 30 50.523954949 13.30 14.14 14.18   14.09 B1-3(II)e 49 0
40 V* V662 Cas HXB 01 18 02.6973905772 +65 17 29.829417242 12.27 11.99 11.14 10.33 9.58 B1Iae 226 0
41 V* V635 Cas HXB 01 18 31.9704429246 +63 44 33.071137750 17.05 16.64 15.19 14.34 13.22 B0.2Ve 650 0
42 PSR J0146+6145 Psr 01 46 22.21 +61 45 03.8   28.100 25.620     ~ 500 0
43 EM* GGA 104 HXB 01 47 00.2121223849 +61 21 23.661992704 11.76 12.09 11.366 11.00 10.52 B1IIIe 167 0
44 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5375 1
45 V* BQ Cam HXB 03 34 59.9116460415 +53 10 23.296351781   17.16 15.42 14.26 13.04 O8.5Ve 390 1
46 V* X Per HXB 03 55 23.0778791365 +31 02 45.045745259 6.090 6.840 6.720     O9.5III 897 0
47 LS V +44 17 HXB 04 40 59.3295352454 +44 31 49.258751047 11.02 11.42 10.73 10.28 9.76 B0.2Ve 96 0
48 RX J0502.9-6626 HXB 05 02 51.5991 -66 26 24.998   14.12 14.22     B0Ve 32 0
49 RX J0529.7-6556 HXB 05 29 47.8545767097 -65 56 43.592792313 13.761 14.477 14.594   14.741 B0.5Ve 24 0
50 RX J0530.1-6551 X 05 30 10.6000 -65 51 26.994           ~ 11 1
51 RX J0531.2-6609 HXB 05 31 13.3008 -66 07 05.006     14.4     B0.7Ve 52 1
52 X LMC X-4 HXB 05 32 49.5558669817 -66 22 13.202534152   13.9 14.0     O8III 597 0
53 RX J0535.6-6651 HXB 05 35 40.9965654015 -66 51 53.522991468   13.7 13.8     B0.5IIIe 277 0
54 HD 245770 HXB 05 38 54.5749436467 +26 18 56.839215267 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 856 0
55 RX J0544.1-7100 HXB 05 44 05.2037031110 -71 00 50.782727548 14.598 15.292 15.235   15.220 B0Ve 23 0
56 PSR J0635+0533 Psr 06 35 17.4 +05 33 21   13.81 12.83     B1IIIe-B2Ve 38 0
57 HD 49798 HXB 06 48 04.7000758397 -44 18 58.432035331 6.758 8.017 8.287 8.391 8.543 sdO6 276 0
58 2E 1752 HXB 06 58 17.2878555250 -07 12 35.203675058   12.38 10.9 11.40   O9.7Ve 71 0
59 RX J0720.4-3125 N* 07 20 24.961 -31 25 50.21   26.1   27.0   ~ 275 0
60 V* V441 Pup HXB 07 28 53.5787769417 -26 06 28.895160996 11.27 12.29 11.83 11.53   O5Ve 65 0
61 V* V572 Pup HXB 08 12 28.3576629560 -31 14 52.138780764 12.14 13.03 12.74 12.44   B0.2IVe 59 0
62 Ginga 0834-430 HXB 08 35 55 -43 11.1     20.4     B0-2III-Ve 89 0
63 V* GP Vel HXB 09 02 06.8610736194 -40 33 16.896402010 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1351 0
64 [KRL2007b] 84 HXB 10 09 46 -58 17.5     15.27     B0e 166 0
65 LS 1698 HXB 10 37 35.3144388592 -56 47 55.866836619   12.00 11.48 11.38   B0III/V:e 91 0
66 2E 2336 HXB 10 50 08.93 -59 53 19.9           Be 370 0
67 WRAY 15-793 HXB 11 20 57.1736252056 -61 55 00.165172193 12.81 13.06 12.12     O9.5III/Ve 169 0
68 V* V779 Cen HXB 11 21 15.0920367078 -60 37 25.627505233   14.4       O9III/Veq 984 0
69 HD 306414 s*b 11 21 46.8237210288 -59 51 47.969821291 10.12 10.69 10.23 10.00   B1Ia 132 0
70 UCAC2 4813819 HXB 11 44 00.2944630617 -61 07 36.482240268     13.4     B2III/B0V 44 0
71 1E 1145.1-6141 HXB 11 47 28.5595495558 -61 57 13.424380577   13.08       B2Iae 123 0
72 HD 102567 Be* 11 48 00.0214627917 -62 12 24.900348094 8.24 9.06 9.00 9.62   O/Bne 287 0
73 V* BP Cru HXB 12 26 37.5607088371 -62 46 13.259605389   12.70 10.66     B1.5Iaeq 594 0
74 V* V850 Cen HXB 13 01 17.0966951298 -61 36 06.636402972   15.6       B2Vne 266 0
75 [KRL2007b] 129 Psr 13 01 58.7203639191 -63 58 08.830169485           O9V/B1III 50 0
76 SAX J1324.4-6200 HXB 13 24 26.70 -62 01 19.5           Be? 20 0
77 4U 1416-62 HXB 14 21 12.8 -62 41 54   17.9 17.2     B1Ve 120 0
78 SAX J1452.8-5949 HXB 14 52 52.70 -59 49 08.1           Be? 18 0
79 V* QV Nor HXB 15 42 23.3633078550 -52 23 09.576918639   16.3 14.5     B0.2Ia:e 366 1
80 [KRL2007b] 171 HXB 15 44 02 -56 42.7           Be? 51 0
81 2S 1553-542 HXB 15 57 49.00 -54 24 54.0           Be 95 0
82 SWIFT J1626.5-5156 HXB 16 26 36.5197160119 -51 56 30.599836308       16.03 14.59 B0V 61 0
83 3FHL J1631.6-4756e HXB 16 32 01.87 -47 52 28.3           O8I 141 3
84 [KRL2007b] 194 Psr 16 36 30 -47 37.5           Be 91 0
85 NAME AX J163904-4642 HXB 16 39 06 -46 42.2           BIV-V 78 1
86 2MASS J16463526-4507045 HXB 16 46 35.2592332854 -45 07 04.609816032   15.2       O9.5Ia 87 1
87 PSR J1647-4552 Psr 16 47 10.18 -45 52 16.7           ~ 171 1
88 2XMMi J170004.2-415804 HXB 17 00 04.26 -41 58 04.7           Be? 18 0
89 NAME OAO 1657-41 HXB 17 00 48.884 -41 39 21.46           Ofpe/WN9 205 0
90 PSR J1708-4008 Psr 17 08 49.0 -40 09 10           ~ 256 0
91 2XMM J172511.3-361658 HXB 17 25 11.392 -36 16 57.53           B0-1Ia 104 2
92 AX J1740.1-2847 X 17 40 09.1324900137 -28 47 25.818958013           ~ 9 0
93 AX J1740.3-2904 DQ* 17 40 16.1010922868 -29 03 38.002729535   19.1 19.1 18.8   ~ 24 0
94 2XMM J174906.8-273232 HXB 17 49 06.79 -27 32 32.4           B1-3 41 0
95 2XMM J174912.3-272537 HXB 17 49 12.28 -27 25 37.4           B3 31 0
96 GRO J1750-27 HXB 17 49 12.969 -26 38 38.93           Be? 51 1
97 IGR J18029-2016 HXB 18 02 39.9 -20 17 13           B1b 68 1
98 PSR J1808-2024 Psr 18 08 39.32 -20 24 40.1           ~ 1068 2
99 AX J1809.8-1943 Psr 18 09 51.07 -19 43 51.8           ~ 344 0
100 [KRL2007b] 314 HXB 18 20 29.5 -14 34 24           O9.5-B0Ve 55 1
101 2XMM J182944.0-095123 Psr 18 29 44.01 -09 51 23.0           ~ 19 1
102 X Sct X-1 HXB 18 35 25.8244599405 -07 36 50.413463588           ~ 66 0
103 [KRL2007b] 332 HXB 18 41 00.43 -05 35 46.5           B1Ib 115 1
104 PSR J1841-0456 Psr 18 41 19.29 -04 56 11.4           ~ 224 1
105 AX J1844.8-0258 HXB 18 44 53 -02 56.0           ~ 110 0
106 2MASS J18453684+0051474 HXB 18 45 36.8356137141 +00 51 47.438374606     20.6     B0-2IV-Ve 103 0
107 IGR J18483-0311 HXB 18 48 17.2064881183 -03 10 16.876608322 23.702 25.162 21.884 17.888 15.88 B0.5Ia 108 0
108 4U 1850-03 HXB 18 48 17.7 -02 25 13           Be? 96 1
109 2MASS J18553040-0236167 HXB 18 55 30.4059836401 -02 36 16.737233178           B0Iaep 80 0
110 [KRL2007b] 348 HXB 18 58 43 +03 26.3   19.63 18.01     Be? 66 0
111 4U 1901+03 HXB 19 03 39.3919805263 +03 12 15.742327187           OB 73 0
112 XTE J1906+090 HXB 19 04 47.491 +09 02 41.40           Be? 23 0
113 GBS 1900+14 gB 19 07 13 +09 19.6           ~ 766 0
114 4U 1907+09 HXB 19 09 37.9 +09 49 49   19.41 16.35 14.40 12.53 O8.5Iab 304 1
115 4U 1908+075 HXB 19 10 48.2141670291 +07 35 51.715745251           O7.5-9.5sg 102 0
116 XTE J1946+274 HXB 19 45 39.3569004855 +27 21 55.502556930   18.76 16.92 15.62 14.38 B0-1IV-Ve 98 0
117 2MASS J19493548+3012317 HXB 19 49 35.4840244577 +30 12 31.775034731   15.16 14.22 13.53 12.88 B0Ve 128 1
118 V* V2306 Cyg XB* 19 58 14.4693308282 +32 32 42.002218648 15.16 15.94 15.71 15.76   ~ 55 0
119 2MASS J20002185+3211232 HXB 20 00 21.8553545166 +32 11 23.130273069   17.6   16.1   BV/BIII 27 0
120 V* V2246 Cyg HXB 20 32 15.2744631713 +37 38 14.839930326   22.16 19.41 17.32 15.18 B0Ve 370 0
121 GRO J2058+42 HXB 20 58 47.5371693693 +41 46 37.180557326   15.97 14.74 14.74 13.35 O9.5-B0IV-Ve 57 0
122 GSC 03588-00834 HXB 21 03 35.7101268891 +45 45 05.568943629   15.34 14.20 13.49 12.75 B0Ve 145 0
123 V* V490 Cep HXB 21 39 30.6903601561 +56 59 10.421972716   15.2       B1.5Ve 125 1
124 4U 2238+60 HXB 22 39 20.8444678371 +61 16 26.607919757   16.26 14.80 13.89 12.92 Be 42 0
125 2E 4673 HXB 23 01 08.14 +58 52 44.5           ~ 575 1

    Equat.    Gal    SGal    Ecl

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2019.10.18-09:36:55

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