2023AJ....166...23H

Query : 2023AJ....166...23H

2023AJ....166...23H - Astron. J., 166, 23 (2023/July-0)

Estimation of the Flux at 1450 MHz of OB Stars for FAST and SKA.

HUANG Q., JIANG B., DENG D., YU B. and ZIJLSTRA A.

Abstract (from CDS):

Radio observation is crucial to understanding the wind mechanism of OB stars but very scarce. This work estimates the flux at 1450 MHz (S1.4GHz) of about 5000 OB stars identified by the LAMOST spectroscopic survey and confirmed by the Gaia astrometric as well as astrophysical measurements. The calculation is performed under the free-free emission mechanism for wind with the mass-loss rate derived from stellar parameters. The estimated S1.4GHz distributes from 10–11 to 10–3 Jy with the peak at about 10–8 Jy. This implies that the complete SKA-II can detect more than half of them, and some tens of objects are detectable by FAST without considering source confusion. An array of FAST would increase the detectable sample by 2 orders of magnitude.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): OB stars - Radio continuum emission - Stellar winds - Radio telescopes

VizieR on-line data: <Available at CDS (J/AJ/166/23): table1.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 25

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Number of rows : 25
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 BD+54 3 * 00 08 48.0583369776 +55 39 59.466020688 9.93 10.51 10.39     B 10 0
2 TYC 3661-1648-1 * 00 18 52.7815949688 +57 07 38.179991244   11.80 11.79     ~ 2 0
3 Gaia DR3 442249316436001152 * 03 33 40.0163685768 +51 22 30.725771088           ~ 4 0
4 Ass Ori OB 2 As* 05 31 26.000 +12 09 36.00           ~ 6 0
5 NVSS J055708+210742 Rad 05 57 08.31 +21 07 41.4           ~ 3 1
6 NVSS J061453+122122 Rad 06 14 53.44 +12 21 22.9           ~ 6 1
7 MFJ SH 2-272 3 * 06 15 01.3 +12 19 51 13.62 13.94 13.3     ~ 5 0
8 SDSS J062231.18+262932.4 * 06 22 31.1800373520 +26 29 32.458213680           ~ 2 0
9 NVSS J062542+195956 Rad 06 25 42.18 +19 59 56.1           ~ 1 0
10 NAME Rosette OB Association As* 06 31.7 +04 58           ~ 148 0
11 TYC 154-1153-1 * 06 36 02.5238872128 +05 30 21.362032728   11.87 12.32     B7V 4 0
12 Lan 76 UV 06 51 33.05 +02 50 08.2   13.5 12.9     ~ 2 0
13 NVSS J065159+135744 Rad 06 51 59.47 +13 57 44.6           ~ 1 0
14 TYC 2440-341-1 Pe* 06 52 37.9244419608 +32 39 13.006708956   12.22 12.62     B8IV(HgMn) 2 0
15 * 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 951 0
16 NVSS J195848+404205 Rad 19 58 48.15 +40 42 05.7           ~ 1 0
17 Ass Cyg OB 8 As* 20 15 +40.9           ~ 73 0
18 [CPR2002] A15 * 20 31 36.9100232904 +40 59 09.036657888           O7Ib(f) 15 0
19 BD+40 4220 s*b 20 32 22.4238071594 +41 18 18.942475904 11.32 10.61 9.185     O7Iafep 414 0
20 Schulte 12 s*b 20 32 40.9572199728 +41 14 29.279036940 16.1 14.45 11.702     B3-4Ia+ 453 0
21 Schulte 9 s*b 20 33 10.7362926720 +41 15 08.222370372 13.38 12.77 10.96     O5I+O4III 243 0
22 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
23 Schulte 7 * 20 33 14.1095938872 +41 20 21.904113804 12.24 12.00 10.55     O3If* 153 0
24 Ass Cep OB 2 As* 21 51 +60.0           ~ 303 0
25 Ass Gem OB 2 As* ~ ~           ~ 3 0

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