2000A&A...354..551R


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET22:34:41

2000A&A...354..551R - Astronomy and Astrophysics, volume 354, 551-556 (2000/2-2)

A search for nonthermal radio emission from OB and WR stars with RATAN-600.

RAGUZOVA N.V. and SIDORENKOV V.N.

Abstract (from CDS):

We have searched for nonthermal radio emission from 40 OB and WR stars. Enhanced nonthermal radio emission from an early-type star could be evidence for the presence of a collapsed companion, and thus for its origin as the result of a supernova explosion in a massive binary. As shown in the evolutionary calculations of joint evolution of a neutron star and a normal star in binaries (Lipunov & Prokhorov, 1987AZh....64.1189L), a considerable fraction of neutron stars in binary systems having an optical companion must be in the ejector state. A neutron star in this state generates a relativistic wind like an isolated radio pulsar. Most ejectors in binary systems can not be identified as radio pulsars because of absorption of radiowaves in the stellar wind of the normal companion, but instead, they may appear as sources of high-energy quanta due to the synchrotron radiation of relativistic particles (ejected by the radio pulsar) in the magnetic field of a normal star (Lipunov & Prokhorov, 1984Ap&SS..98..221L; Lipunov & Nazin, 1994A&A...289..822L). In this case a source of nonthermal radiation in a wide range from radio to hard gamma-ray may appear as a result of a specific reflection effect in the magnetic field of the optical companion. Cyg X-3 and the periodic radioburster LS I +61 303 may be examples of just this kind. To test this idea, measurements of radio flux densities in the range from 0.96 to 21.7GHz from selected OB and WR stars were made with the RATAN-600. No nonthermal radio emission from the selected stars were detected.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: Wolf-Rayet - stars: binaries: close - radio continuum: stars - radiation mechanisms: non-thermal

Simbad objects: 52

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Number of rows : 52

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2462 2
2 QSO B0237-2322 QSO 02 40 08.1742481040 -23 09 15.727160394   16.78 16.63     ~ 469 0
3 LS I +61 303 HXB 02 40 31.6641883136 +61 13 45.591138110 11.27 11.61 10.75 10.19 9.55 B0Ve 754 2
4 * pi. Ari ** 02 49 17.55924 +17 27 51.5168 4.68         B6V 94 0
5 * u Tau SB* 03 45 40.4430080459 +06 02 59.988283002   5.225 5.337     B3V 118 0
6 HD 24190 SB* 03 52 18.9579246399 +34 13 19.610461532 6.84 7.46 7.45     B2V 81 0
7 * ksi Per ** 03 58 57.9022917 +35 47 27.713205 3.190 4.080 4.060 3.88 3.89 O7.5III(n)((f)) 788 0
8 V* V490 Per EB* 04 06 39.0435589691 +32 23 06.212723487   7.11 7.0     B3V 75 0
9 * mu. Eri Al* 04 45 30.1503818 -03 15 16.776562 3.26 3.87 4.00     B5IV 149 0
10 * zet Tau Be* 05 37 38.6854231 +21 08 33.158804 2.22 2.84 3.03 3.06 3.15 B1IVe_shell 694 0
11 HD 37737 SB* 05 42 31.1582447671 +36 12 00.505876189 8.02 8.30 8.06     O9.5II-III(n) 81 0
12 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1244 1
13 2C 553 QSO 06 27 10.1 -05 53 06           ~ 148 1
14 HD 50896 WR* 06 54 13.0440847499 -23 55 42.020318514 5.74 6.63 6.91 7.74   WN4b 732 0
15 HD 56925 WR* 07 18 29.1313276537 -13 13 01.513156589 11.21 11.74 11.56 11.40   WN4b 152 0
16 HD 62910 WR* 07 44 58.2216344436 -31 54 29.553631132 10.08 10.44 10.10 10.17   WN6/WC4 113 0
17 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 831 0
18 ICRF J092703.0+390220 Sy1 09 27 03.0139516273 +39 02 20.847968628   17.17 17.00 16.486   ~ 922 1
19 WR 19 WR* 10 18 04.9886804992 -58 16 26.241795620   14.80 13.85     WC5+O9 56 0
20 QSO B1245-197 QSO 12 48 23.89812760 -19 59 18.5889413   21.52 20.5     ~ 121 1
21 CPD-63 2495 HXB 13 02 47.6541729595 -63 50 08.625922862 10.34 10.72 9.98 10.03   O9.5Ve 663 1
22 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3659 1
23 * zet04 Lib V* 15 32 55.2197638813 -16 51 10.247077231 4.61 5.355 5.499     B3V 103 0
24 * lam Lib SB* 15 53 20.0553041075 -20 10 01.442049195 4.43 4.997 5.027     B3V 199 0
25 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 688 0
26 V* V600 Her Ce* 16 36 58.2041650076 +14 28 30.910552466 5.87 6.845 7.028     B0.5III 152 0
27 LS 3982 WR* 17 14 27.1191115555 -39 45 47.053559348 10.63 10.95 10.41     WN6h-w 61 0
28 HD 156327 WR* 17 18 23.0613730 -34 24 30.630847 9.88 9.95 9.32 9.67   WC7+B0III 113 0
29 WRAY 15-1666 WR* 17 18 52.8750745581 -38 50 03.606959080 13.93 13.27 11.83 11.43   WN7 64 0
30 HD 161573 SB* 17 46 07.3250513317 +05 31 48.697102465   6.824 6.848     B4 70 0
31 HD 168206 WR* 18 19 07.3628284656 -11 37 59.165038875 9.65 9.88 9.10     WC8+O8/9III/V 277 1
32 RAFGL 2179 WR* 18 31 42.2117071870 -09 59 16.687501795   25.0 22.0     WC9 83 0
33 EM* AS 320 WR* 18 44 13.1527220304 -03 47 57.779718279 13.7 13.340 13.983     WC9d 110 0
34 HD 178329 SB* 19 06 17.0359265622 +41 24 49.611093636 5.66 6.345 6.496     B3V 65 0
35 MR 93 WR* 19 28 15.6144084163 +19 33 21.527872339   14.83       WC7+O9(III) 100 0
36 WR 126 WR* 19 39 56.1963912195 +26 34 42.481192808   13.99 13.29     WC5 30 0
37 HD 188209 s*b 19 51 59.0685711923 +47 01 38.420250587 4.61 5.55 5.63 5.54 5.64 O9.5Iab 288 0
38 * 9 Sge s*b 19 52 21.7651155105 +18 40 18.753390402 5.32 6.24 6.23     O7.5Iabf 275 1
39 HD 190918 WR* 20 05 57.3242972785 +35 47 18.153743699 6.11 6.88 6.75     WN5+O9I 339 0
40 HD 191765 WR* 20 10 14.1929815789 +36 10 35.069005168 7.64 8.08 8.08     WN6-s 416 0
41 HD 192103 WR* 20 11 53.5274946554 +36 11 50.523501826 7.77 8.13 8.11     WC8+OB: 315 0
42 HD 192163 WR* 20 12 06.5420067895 +38 21 17.783840972 7.12 7.49 7.50     WN6(h)-s 513 0
43 V* V1521 Cyg HXB 20 32 25.78 +40 57 27.9           WN4/5-6/7 1753 2
44 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 936 0
45 HD 197406 WR* 20 41 21.5486849958 +52 35 15.140677138 10.42 10.87 10.30     WN8h+B3IV/BH 183 0
46 V* V1792 Cyg SB* 20 51 30.9398839257 +37 59 22.162798213 6.82 7.36 7.27     B2V 44 0
47 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2308 1
48 * 68 Cyg SB* 21 18 27.1855667264 +43 56 45.388423736 4.05 4.99 5.00     O7.5IIIn((f)) 359 0
49 ICRF J213032.8+050217 G 21 30 32.87739291 +05 02 17.4741657     23.4     ~ 138 1
50 * pi.02 Cyg SB* 21 46 47.6083178 +49 18 34.451096 3.4 4.11 4.18     B3III 161 0
51 V* V365 Lac SB* 22 05 51.2183224621 +48 13 53.374020843 5.5 6.160 6.254     B2V 91 0
52 HD 214930 * 22 41 25.7303353017 +23 50 47.672476832 6.56 7.27 7.40     B2IV 59 0

    Equat.    Gal    SGal    Ecl

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2020.02.17-22:34:41

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