2022ApJ...932...21K

Query : 2022ApJ...932...21K

2022ApJ...932...21K - Astrophys. J., 932, 21-21 (2022/June-2)

Radio Emission from Binary Ultracool Dwarf Systems.

KAO M.M. and PINEDA J.S.

Abstract (from CDS):

Well-characterized binary systems will provide valuable opportunities to study the conditions that are necessary for the onset of both auroral and nonauroral magnetospheric radio emission in the ultracool dwarf regime. We present new detections of nonauroral "quiescent" radio emission at 4-8 GHz of the three ultracool dwarf binary systems GJ 564 BC, LP 415-20, and 2MASS J21402931+1625183. We also tentatively detect a highly circularly polarized pulse at 4-6 GHz that may indicate aurorae from GJ 564 BC. Finally, we show that the brightest binary ultracool dwarf systems may be more luminous than predictions from single-object systems.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Brown dwarfs - Binary stars - Magnetic fields - Radio continuum emission

Simbad objects: 20

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Number of rows : 20
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 NAME L 362-29 BC BD* 00 04 34.8671722377 -40 44 06.463544237       19.61 16.88 L5+L5 119 0
2 LP 349-25 SB* 00 27 56.0057038615 +22 19 32.635434516   18.6   16.0   M8Ve 82 0
3 LP 415-20 LM* 04 21 49.5764748384 +19 29 08.566062612           M7+M9.5 56 0
4 2MASSI J0423485-041403 BD* 04 23 48.5763811987 -04 14 03.246502948           L6.5+T2 137 0
5 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
6 PKS 0428+205 rG 04 31 03.76141386 +20 37 34.2648470   22.174   19.085   ~ 198 1
7 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
8 NAME Scholz's star LM* 07 20 03.25368 -08 46 49.9044   19.9   16.9 13.80 M9.5+T5 70 0
9 2MASSI J0952219-192431 LM* 09 52 21.8872375272 -19 24 32.203844316     18.349 16.402 14.199 M7Ve 38 0
10 2MASSI J1043075+222523 BD* 10 43 07.58328 +22 25 23.6100           L8.5 37 0
11 SIPS J1256-1257B BD* 12 56 01.83264 -12 57 27.6912           L7 154 0
12 SIPS J1256-1257 LM* 12 56 02.1337046541 -12 57 21.924307013     17.759   13.318 M7.0 75 0
13 LP 497-33 ** 13 14 20.376648 +13 20 01.00608   16.8 15.83 14.9 11.94 M6.0V 84 0
14 2MASS J13153094-2649513 BD* 13 15 30.8597827568 -26 49 51.829331165           L5e 52 1
15 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
16 7C 1441+2514 Bla 14 43 56.89220390 +25 01 44.4907165   19.5   19.7   ~ 179 1
17 HD 130948 BY* 14 50 15.8109853464 +23 54 42.634220112   6.456 5.867     F9IV-V 306 0
18 NAME HD 130948BC BD* 14 50 16.00 +23 54 41.8           L4+L4 75 0
19 QSO B2136+1410 Bla 21 39 01.30926630 +14 23 35.9921774     18.90 18.22   ~ 264 1
20 2MASS J21402931+1625183 ** 21 40 29.3219106816 +16 25 18.097174704         15.36 M8+M9.5 35 0

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