2013ApJ...768...64H

Query : 2013ApJ...768...64H

2013ApJ...768...64H - Astrophys. J., 768, 64 (2013/May-1)

The correlation between dispersion measure and X-ray column density from radio pulsars.

HE C., NG C.-Y. and KASPI V.M.

Abstract (from CDS):

Pulsars are remarkable objects that emit across the entire electromagnetic spectrum, providing a powerful probe of the interstellar medium. In this study, we investigate the relation between dispersion measure (DM) and X-ray absorption column density NH using 68 radio pulsars detected at X-ray energies with the Chandra X-Ray Observatory or XMM-Newton. We find a best-fit empirical linear relation of NH(1020/cm2) = 0.30+0.13-0.09_DM(pc/cm3), which corresponds to an average ionization of 10+4–3%, confirming the ratio of one free electron per 10 neutral hydrogen atoms commonly assumed in the literature. We also compare different NH estimates and note that some NH values obtained from X-ray observations are higher than the total Galactic H I column density along the same line of sight, while the optical extinction generally gives the best NHpredictions.

Abstract Copyright: ∼

Journal keyword(s): dust, extinction - ISM: general - pulsars: general - X-rays: ISM

Simbad objects: 73

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Number of rows : 73
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 J0108-1431 Psr 01 08 08.29 -14 31 48.5           ~ 113 0
3 PSR B0136+57 Psr 01 39 19.744 +58 14 31.73     13.41     ~ 163 0
4 PSR J0146+6145 Psr 01 46 22.21 +61 45 03.8   28.100 25.620     ~ 613 0
5 PSR J0205+6449 Psr 02 05 37.92 +64 49 42.8           ~ 268 1
6 PSR J0218+42 Psr 02 18 06.3604 +42 32 17.365           ~ 365 2
7 PSR B0355+54 Psr 03 58 53.7165 +54 13 13.727           ~ 465 1
8 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 1032 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
10 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
11 PSR J0538+2813 Psr 05 38 25.06 +28 17 11.0           ~ 224 1
12 PSR B0540-69 Psr 05 40 11.2000490438 -69 19 54.198559829           ~ 976 3
13 PSR B0628-28 Psr 06 30 49.35000 -28 34 42.1000           ~ 313 1
14 PSR B0656+14 Psr 06 59 48.18800 +14 14 19.2000   24.85 24.90     ~ 943 1
15 PSR J0737-3039 Psr 07 37 51.248 -30 39 40.83           ~ 445 1
16 NAME GUM Nebula ISM 07 43 -42.1           ~ 454 1
17 PSR B0823+26 Psr 08 26 51.5068 +26 37 21.297           ~ 541 1
18 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2446 1
19 PSR B0950+08 Psr 09 53 09.31210 +07 55 36.9000           ~ 806 2
20 PSR J1016-58 Psr 10 16 21.266 -58 57 11.70           ~ 129 3
21 PSR J1023+0038 Psr 10 23 47.6841824712 +00 38 41.005893516     17.31     GV 470 0
22 PSR J1025-07 Psr 10 24 38.6991893112 -07 19 19.045523388     19.81 18.78 18.00 ~ 286 1
23 PSR B1046-58 Psr 10 48 13.10000 -58 32 03.0000           ~ 293 0
24 PSR B1055-52 Psr 10 57 59.0450 -52 26 56.330           ~ 757 0
25 PSR J1119-6127 Psr 11 19 14.30 -61 27 49.5           ~ 439 1
26 PSR J1124-5916 Psr 11 24 37.6 -59 16 20           ~ 178 1
27 PSR J1231-1411 Psr 12 31 11.3069 -14 11 43.628           ~ 139 0
28 CPD-63 2495 HXB 13 02 47.6544015048 -63 50 08.626970292 10.34 10.72 9.98 10.03   O9.5Ve 852 0
29 PSR J1357-6429 Psr 13 57 02.525 -64 29 29.89           ~ 171 1
30 SNR G310.6-01.6 SNR 14 00 45.69 -63 25 42.6           ~ 45 1
31 PSR J1420-6048 Psr 14 20 08.190 -60 48 14.85           ~ 214 0
32 PSR B1451-68 Psr 14 56 00.0175876848 -68 43 40.034742348           ~ 203 0
33 PSR J1509-5850 Psr 15 09 27.153 -58 50 56.05           ~ 131 0
34 PSR B1509-58 Psr 15 13 47.6 -59 07 54     13.06     ~ 879 1
35 PSR J1550-5418 Psr 15 50 54.18 -54 18 23.9           ~ 463 1
36 PSR J1614-2230 Psr 16 14 36.50974 -22 30 31.5420           ~ 452 1
37 PSR J1617-5055 Psr 16 17 29.35 -50 55 12.8           ~ 128 1
38 PSR J1622-4950 Psr 16 22 44.80000 -49 50 54.5000           ~ 169 0
39 PSR B1706-44 Psr 17 09 42.62000 -44 29 12.0000     13.30     ~ 670 1
40 PSR J1718-3718 Psr 17 18 10.16 -37 18 53.8           ~ 73 0
41 PSR J1718-3825 Psr 17 18 13.558 -38 25 17.83           ~ 108 0
42 PSR B1731-33.5 Psr 17 34 26.6 -33 33 22           ~ 104 1
43 PSR J1740+1000 Psr 17 40 25.91 +10 00 06.0           ~ 110 0
44 PSR J1740-5340 Psr 17 40 44.589 -53 40 40.90   17.43   16.25   ~ 157 2
45 PSR J1741-2054 Psr 17 41 57.282 -20 54 04.11           ~ 123 1
46 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
47 PSR J1747-2958 Psr 17 47 15.869 -29 58 00.93           ~ 142 1
48 SNR G000.9+00.1 SNR 17 47.3 -28 09           ~ 222 1
49 PSR B1757-24 Psr 18 01 00.016 -24 51 27.50           ~ 258 1
50 PSR B1800-21 Psr 18 03 51.40000 -21 37 07.0000           ~ 278 1
51 PSR J1809-1917 Psr 18 09 43.147 -19 17 38.10           ~ 128 1
52 AX J1809.8-1943 Psr 18 09 51.07 -19 43 51.8           ~ 532 0
53 PSR J1819-1458 Psr 18 19 34.173 -14 58 03.57           ~ 136 0
54 PSR J1824-2452A Psr 18 24 32.009 -24 52 11.10           ~ 529 2
55 PSR B1823-13 Psr 18 26 13.06 -13 34 48.1           ~ 460 1
56 SNR G021.5-00.9 SNR 18 33 33.612 -10 34 07.69           ~ 490 1
57 PSR B1853+01 Psr 18 56 10.65 +01 13 21.3           ~ 211 1
58 PSR J1930+1852 Psr 19 30 30.13 +18 52 14.1           ~ 110 1
59 PSR B1929+10 Psr 19 32 14.0570 +10 59 33.380           ~ 801 0
60 PSR B1937+21.4 Psr 19 39 38.560096 +21 34 59.13552           ~ 1142 0
61 PSR B1951+32 Psr 19 52 58.181 +32 52 40.98           ~ 615 2
62 PSR J1959+2048 Psr 19 59 36.7643141520 +20 48 14.896407996   21.08 20.16 19.53 18.79 G: 854 3
63 PSR J2021+3651 Psr 20 21 05.40 +36 51 04.5           ~ 218 1
64 PSR J2022+3842 Psr 20 22 21.689 +38 42 14.82           ~ 66 0
65 [MT91] 213 Psr 20 32 13.1247390384 +41 27 24.346666440 13.12 13.08 11.266     B0Vp 334 0
66 PSR J2043+2740 Psr 20 43 43.5 +27 40 56           ~ 137 0
67 PSR J2124-3358 Psr 21 24 43.834930 -33 58 45.49195           ~ 337 1
68 PSR B2223+65 Psr 22 25 52.8627 +65 35 36.371           ~ 342 0
69 PSR J2229+6114 Psr 22 29 05.262 +61 14 08.48           ~ 252 2
70 PSR J2241-5236 Psr 22 41 42.03161 -52 36 36.2492           ~ 143 1
71 PSR J2302+4442 Psr 23 02 46.9789 +44 42 22.102           ~ 124 0
72 PSR B2334+61 Psr 23 37 05.779 +61 51 01.69           ~ 206 1
73 NAME Local Bubble ISM ~ ~           ~ 1059 0

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