2021MNRAS.505.4215D

Query : 2021MNRAS.505.4215D

2021MNRAS.505.4215D - Mon. Not. R. Astron. Soc., 505, 4215-4234 (2021/August-2)

A novel survey for young substellar objects with the W-band filter III: Searching for very low-mass brown dwarfs in Serpens South and Serpens Core.

DUBBER S., BILLER B., ALLERS K., JOSE J., ALBERT L., PANTOJA B., FONTANIVE C., LIU M., ZHANG Z., CHEN W.-P., LALCHAND B., DAMIAN B. and SHARMA T.

Abstract (from CDS):

We present CFHT photometry and IRTF spectroscopy of low-mass candidate members of Serpens South and Serpens Core (∼430 pc, ∼0.5 Myr), identified using a novel combination of photometric filters, known as the W-band method. We report SC182952+011618, SS182959-020335, and SS183032-021028 as young, low-mass Serpens candidate members, with spectral types in the range M7-M8, M5-L0, and M5-M6.5, respectively. Best-fitting effective temperatures and luminosities imply masses of < 0.12M☉ for all three candidate cluster members. We also present Hubble Space Telescope imaging data (F127M, F139M, and F850LP) for six targets in Serpens South. We report the discovery of the binary system SS183044-020918AB. The binary components are separated by ≃45 AU, with spectral types of M7-M8 and M8-M9, and masses of 0.08-0.1 and 0.05-0.07 M☉. We discuss the effects of high dust attenuation on the reliability of our analysis, as well as the presence of reddened background stars in our photometric sample.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): binaries: general - brown dwarfs - stars: low-mass

Nomenclature: Table 1: [DBA2021] SSHHMMSS+DDMMSSW N=29, [DBA2021] SCHHMMSS+DDMMSS N=7.

Simbad objects: 50

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Number of rows : 50
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 [DBL2011] 2MASS J0130-4445 ** 01 30 35.6376508584 -44 45 41.199312132         17.18 M9+L6 12 0
2 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
3 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
4 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
5 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
6 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
7 HD 167163 EB* 18 14 01.0144201320 +00 11 57.975987660   9.67 9.32     B9.5IV/V 30 0
8 NAME Serpens Main Cloud MoC 18 29.2 +00 36           ~ 39 0
9 [DBA2021] SS182912-021300 LM? 18 29 12.3 -02 13 00           ~ 1 0
10 SSTgbs J1829166-020339 LM* 18 29 16.6 -02 03 40           M4-M7 5 0
11 [DBA2021] SS182917-020923 LM? 18 29 17.2 -02 09 23           ~ 1 0
12 2MASS J18291814-0202449 LM* 18 29 18.149 -02 02 45.00           M5-M8 5 0
13 [DBA2021] SS182938-015935 LM? 18 29 38.7 -01 59 35           ~ 1 0
14 [DBA2021] SS182942-015935 LM? 18 29 42.6 -01 59 35           ~ 1 0
15 [DBA2021] SS182949-020308 Y*? 18 29 49.0 -02 03 08           M 1 0
16 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1
17 [DBA2021] SS182949-020558 Y*O 18 29 49.4 -02 05 58           ~ 2 0
18 2MASS J18295229+0116184 LM* 18 29 52.29 +01 16 18.4           M7-M9 4 0
19 SSTYSV J182952.70-015639.2 LM* 18 29 52.708440 -01 56 39.20652           M7-L0 2 0
20 2MASS J18295536+0110340 Or* 18 29 55.3611830520 +01 10 34.044079044           M5.0 11 0
21 2MASS J18295537-0204166 LM* 18 29 55.378 -02 04 16.68           M4-M6.5 4 0
22 [HCP2006] Cluster A Cld 18 29 56 +01 14.8           ~ 50 0
23 [DBA2021] SC182956+010940 LM? 18 29 56.1 +01 09 40           ~ 1 0
24 2MASS J18295635+0112180 Y*O 18 29 56.3551125576 +01 12 18.078171192           M8.5 12 0
25 SSTYSV J182957.37-015409.9 Y*O 18 29 57.3800 -01 54 09.916           ~ 2 0
26 SSTYSV J182959.47-020917.2 Y*O 18 29 59.479632 -02 09 17.22547           ~ 2 0
27 SSTYSV J182959.89-020335.3 LM* 18 29 59.895504 -02 03 35.37433           M5-L0 2 0
28 NAME Serpens South molecular cloud MoC 18 30 -02.0           ~ 116 0
29 2MASS J18300502+0112360 Y*O 18 30 05.022 +01 12 36.07           M9.0 14 0
30 2MASS J18300619-0202196 Y*O 18 30 06.197 -02 02 19.60           M 7 0
31 [DBA2021] SC183008+010830 LM? 18 30 08.7 +01 08 30           ~ 1 0
32 [DBA2021] SS183016-015728 LM? 18 30 16.4 -01 57 28           ~ 1 0
33 2MASS J18301699+0113074 Y*O 18 30 16.991 +01 13 07.47           ~ 9 0
34 [DBA2021] SS183019-020130 LM? 18 30 19.8 -02 01 30           ~ 1 0
35 [DBA2021] SS183022-015315 LM? 18 30 22.3 -01 53 15           ~ 1 0
36 [DBA2021] SS183029-015409 Y*? 18 30 29.6 -01 54 09           M 1 0
37 [DBA2021] SS183032-021028 LM* 18 30 32.8 -02 10 28           1.619 1 0
38 [DBA2021] SS183037-021411 Y*? 18 30 37.1 -02 14 11           M 2 0
39 [DBA2021] SS183037-020941 Y*? 18 30 37.6 -02 09 42           M 1 0
40 2MASS J18303764-0214191 LM* 18 30 37.648 -02 14 19.14           M3-M6 7 0
41 [DBA2021] SS183038-021437 Y*? 18 30 37.7 -02 14 37           M 2 0
42 [DBA2021] SS183042-021334 LM? 18 30 42.0 -02 13 35           ~ 1 0
43 2MASS J18304434-0209183 LM* 18 30 44.343 -02 09 18.35           M7-M9 7 0
44 [DBA2021] SS183047-020133 Y*? 18 30 46.6 -02 01 33           M 2 0
45 [DBA2021] SS183046-021202 LM? 18 30 46.7 -02 12 03           ~ 1 0
46 SSTgbs J1830469-015651 Y*O 18 30 46.904 -01 56 51.52           ~ 7 0
47 [DBA2021] SS183047-015834 LM? 18 30 47.4 -01 58 34           ~ 1 0
48 HD 172792 * 18 42 33.8342929944 -11 54 05.056395444   10.24 9.80     A0V 18 0
49 HD 174240 * 18 49 37.1928719280 +00 50 10.306332096   6.257 6.226     A1IV 57 0
50 HD 182299 * 19 24 29.4533895072 -14 37 07.301079120   8.46 8.38     A0V 6 0

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