2003ApJ...590..348L

Query : 2003ApJ...590..348L

2003ApJ...590..348L - Astrophys. J., 590, 348-356 (2003/June-2)

New low-mass members of the Taurus star-forming region.

LUHMAN K.L., BRICENO C., STAUFFER J.R., HARTMANN L., BARRADO Y NAVASCUES D. and CALDWELL N.

Abstract (from CDS):

Briceño et al. recently used optical imaging, data from the Two-Micron All-Sky Survey (2MASS), and follow-up spectroscopy to search for young low-mass stars and brown dwarfs in 8 deg2 of the Taurus star-forming region. By the end of that study, there remained candidate members of Taurus that lacked the spectroscopic observations needed to measure spectral types and determine membership. In this work, we have obtained spectroscopy of the 22 candidates that have AV≤8, from which we find six new Taurus members with spectral types of M2.75 through M9. The new M9 source has the second latest spectral type of the known members of Taurus (∼0.02 M☉). Its spectrum contains extremely strong emission in Hα (Wλ∼950 Å), as well as emission in He I 6678 Å and the Ca II IR triplet. This is the least massive object known to exhibit emission in He I and Ca II, which together with the strong Hα are suggestive of intense accretion.

Abstract Copyright: ∼

Journal keyword(s): Infrared: Stars - Stars: Evolution - Stars: Formation - Stars: Low-Mass, Brown Dwarfs - Stars: Luminosity Function, Mass Function - Stars: Pre-Main-Sequence

Nomenclature: Table 2: [BLH2002] KPNO-Tau NN (Nos 10-15) added.

Simbad objects: 32

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Number of rows : 32
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 2MASSW J0149090+295613 BD* 01 49 09.0028348631 +29 56 12.511555579           M9.5V 62 0
2 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
3 2MASS J04131796+2811430 * 04 13 17.9725650432 +28 11 42.942428736           ~ 6 0
4 [BLH2002] KPNO-Tau 10 Or* 04 17 49.5567002040 +28 13 31.770031152     17.8     M5Ve 57 0
5 2MASSs J0417519+282551 * 04 17 51.94 +28 25 51.1           ~ 1 0
6 2MASS J04180215+2817487 LM* 04 18 02.16 +28 17 48.8           M5Ve 3 0
7 2MASSs J0418053+282801 * 04 18 05.38 +28 28 01.3           ~ 1 0
8 [BLH2002] KPNO-Tau 11 TT* 04 18 30.3020636616 +27 43 20.654543028           M5.5Ve 52 0
9 UCAC4 591-011941 SB* 04 18 42.3758625195 +28 11 40.653513408   15.481 13.981 13.752   ~ 3 0
10 [BLH2002] KPNO-Tau 12 Or* 04 19 01.2829227024 +28 02 48.139594656     23.228     M9Ve 57 0
11 2MASS J04192736+2813012 AB? 04 19 27.3766891722 +28 13 01.365671188           M2.0III 4 0
12 2MASSs J0426255+260653 * 04 26 25.50 +26 06 53.4           ~ 1 0
13 2MASSs J0426344+260740 * 04 26 34.45 +26 07 40.2           ~ 1 0
14 [BLH2002] KPNO-Tau 13 TT* 04 26 57.3158364072 +26 06 28.338050124           M5Ve 55 0
15 2MASS J04274283+2622567 LP? 04 27 42.8383708717 +26 22 56.703009193           ~ 2 0
16 UCAC4 582-012385 * 04 32 11.3156706000 +26 13 23.680164144           ~ 6 0
17 UCAC4 583-012420 * 04 32 13.8082587432 +26 30 46.282508712       14.42   ~ 5 0
18 [RRN96] GG Tau B Or* 04 32 30.2766917736 +17 31 30.449809020           M6 57 1
19 V* GG Tau Or* 04 32 30.3506925552 +17 31 40.494063144 14.84 14.78 13.40 11.54   M0e+M2.0e 793 1
20 [BLH2002] KPNO-Tau 14 Or* 04 33 07.8086038248 +26 16 06.561538896     20.735     M6Ve 47 0
21 2MASS J04330802+2556436 * 04 33 08.0167160280 +25 56 43.783756188           ~ 6 0
22 2MASS J04332932+2618096 * 04 33 29.3263196880 +26 18 09.632257236           ~ 6 0
23 UCAC4 542-009480 * 04 33 34.0997188117 +18 14 26.027639591           ~ 3 0
24 2MASSs J0433513+262614 * 04 33 51.33 +26 26 14.3           ~ 1 0
25 2MASS J04352837+2410004 * 04 35 28.38 +24 10 00.5           ~ 2 0
26 [BLH2002] KPNO-Tau 15 Or* 04 35 51.0972056136 +22 52 40.063560924 19.75         M3Ve 41 0
27 2MASSs J0436008+225517 * 04 36 00.85 +22 55 17.4           M7V 1 0
28 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
29 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
30 UGCS J053900.29-023705.7 Y*? 05 39 00.29712 -02 37 05.7648           M8 25 0
31 2MASS J19013357-3700304 Or* 19 01 33.5761986624 -37 00 30.453110028           M6 51 0
32 NAME Corona Australis Cloud MoC 19 01 51 -36 58.9           ~ 554 0

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