2001ApJ...549..433W

Query : 2001ApJ...549..433W

2001ApJ...549..433W - Astrophys. J., 549, 433-440 (2001/March-1)

The proper motion, parallax, and origin of the isolated neutron star RX J185635-3754.

WALTER F.M.

Abstract (from CDS):

The isolated neutron star RX J185635-3754 is the closest known neutron star to the Sun. Based on Hubble Space Telescope Wide Field Planetary Camera 2 observations over a 3 yr baseline, I report its proper motion (332±1 mas.yr–1 at a position angle of 100°.3±0°.1) and parallax (16.5±2.3 mas, 61 pc). This proper motion brings the neutron star from the general vicinity of the Sco-Cen OB association. For an assumed neutron star radial velocity between -55 and -60 km.s–1, the runaway O star ζ Oph, the Upper Sco OB association, and the neutron star come into spatial coincidence between 0.9x106 and 1.0x106 yr ago. RX J185635-3754 may be the remnant of the original primary of the ζ Oph system. If so, the space velocity suggests that the neutron star received a kick of about 200 km.s–1 at birth.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Open Clusters and Associations: Individual: Name: Sco-Cen Association - Stars: Individual: Alphanumeric: RX J185635-3754 - Stars: Kinematics - Stars: Neutron

Nomenclature: Table 2: [W2001] NNN (Nos 100-133, 120 missing).

CDS comments: Table 2 : Sources I and J = WWN I,J.

Simbad objects: 57

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Number of rows : 57
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 J0821-4300 Psr 08 21 58.2 -43 00 22           ~ 129 2
2 NAME Pup A SNR 08 24 07 -42 59.8           ~ 636 1
3 CMS 30 * 08 56 34.899 -37 54 24.11   19.61 18.92     ~ 10 0
4 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
5 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
6 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
7 * zet Oph Be* 16 37 09.5400587698 -10 34 01.509742704 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1908 0
8 [W2001] 116 ? 18 56 33.6869 -37 54 36.232   25.35       ~ 3 0
9 [W2001] 100 ? 18 56 34.2647 -37 54 29.977           ~ 2 0
10 [W2001] 132 ? 18 56 34.4582 -37 54 25.389           ~ 1 0
11 [W2001] 107 ? 18 56 34.4844 -37 54 43.087           ~ 2 0
12 WWN F * 18 56 34.5389054040 -37 54 35.078190444   17.5 17.45 16.9 16.17 G9/K0III/V 8 0
13 [W2001] 101 ? 18 56 34.5549 -37 54 23.679           ~ 1 0
14 [W2001] 117 ? 18 56 34.5558 -37 54 23.072           ~ 2 0
15 [W2001] 102 ? 18 56 34.5906 -37 54 22.338   25.77       ~ 3 0
16 [W2001] 103 ? 18 56 34.8373 -37 54 16.947           ~ 2 0
17 [W2001] 104 ? 18 56 34.9456 -37 54 16.308           ~ 3 0
18 [W2001] 118 ? 18 56 34.9533 -37 54 25.884           ~ 2 0
19 [W2001] 129 ? 18 56 35.0718 -37 54 44.297           ~ 2 0
20 RX J1856.6-3754 Psr 18 56 35.11 -37 54 30.5     25.7     ~ 456 0
21 [W2001] 130 ? 18 56 35.1307 -37 54 14.480           ~ 1 0
22 [W2001] 131 ? 18 56 35.1498 -37 54 17.022           ~ 1 0
23 CMS 23 * 18 56 35.1855 -37 54 36.142     24.41     ~ 9 0
24 CMS 15 * 18 56 35.221 -37 54 46.66   19.39 18.72     ~ 10 0
25 [W2001] 128 ? 18 56 35.2637 -37 54 47.997           ~ 3 0
26 [W2001] 133 * 18 56 35.3161127160 -37 54 28.824419736           ~ 1 0
27 [W2001] 127 ? 18 56 35.3542 -37 54 49.328           ~ 2 0
28 CMS 27 * 18 56 35.408 -37 54 27.76   22.03 21.18     ~ 11 0
29 WWN C * 18 56 35.4450316320 -37 54 49.817253996   17.2 18.21 16.6 16.89 G6/8III/V 10 0
30 [W2001] 105 ? 18 56 35.4770 -37 54 21.313           ~ 2 0
31 [W2001] 125 ? 18 56 35.5023 -37 54 32.800           ~ 2 0
32 [W2001] 106 ? 18 56 35.5512 -37 54 25.310   23.13       ~ 5 0
33 [W2001] 109 ? 18 56 35.5538 -37 54 42.777           ~ 2 0
34 [W2001] 124 ? 18 56 35.5635 -37 54 40.923           ~ 1 0
35 [W2001] 119 ? 18 56 35.6693 -37 54 24.284           ~ 2 0
36 [W2001] 115 ? 18 56 35.7030 -37 54 37.480           ~ 3 0
37 WWN L * 18 56 35.7450334032 -37 54 25.075156860   18.18 17.75 15.9 16.51 G3/6III/V 9 0
38 [W2001] 108 ? 18 56 35.8185 -37 54 47.302           ~ 3 0
39 [W2001] 126 ? 18 56 35.8937 -37 54 28.822           ~ 2 0
40 [W2001] 114 ? 18 56 35.9229 -37 54 31.175   24.66       ~ 5 0
41 [W2001] 122 ? 18 56 35.9440 -37 54 35.188           ~ 1 0
42 [W2001] 121 ? 18 56 36.0028 -37 54 35.401           ~ 2 0
43 [W2001] 110 ? 18 56 36.0382 -37 54 46.799           ~ 2 0
44 [W2001] 113 ? 18 56 36.1096 -37 54 33.936           ~ 3 0
45 [W2001] 123 ? 18 56 36.3414 -37 54 37.038           ~ 1 0
46 [W2001] 112 ? 18 56 36.3679 -37 54 24.570           ~ 3 0
47 [W2001] 111 ? 18 56 37.0722 -37 54 29.560           ~ 2 0
48 NAME Corona Australis Cloud MoC 19 01 51 -36 58.9           ~ 554 0
49 PSR B1929+10 Psr 19 32 14.0570 +10 59 33.380           ~ 801 0
50 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1
51 CMS 33 * ~ ~   16.03 15.69     ~ 5 0
52 CMS 20 G ~ ~     23.92     ~ 5 1
53 CMS 21 * ~ ~   23.50 21.54     ~ 8 0
54 CMS 19 * ~ ~   23.59 22.40     ~ 6 0
55 CMS 24 * ~ ~   22.67 20.85     ~ 7 0
56 CMS 26 * ~ ~   23.07 21.84     ~ 7 0
57 CMS 28 * ~ ~   23.05 22.05     ~ 8 0

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