2004ApJ...600.1016S

Query : 2004ApJ...600.1016S

2004ApJ...600.1016S - Astrophys. J., 600, 1016-1019 (2004/January-2)

Probing the low-mass stellar end of the η Chamaeleontis cluster.

SONG I., ZUCKERMAN B. and BESSELL M.S.

Abstract (from CDS):

We have identified three faint new members of the η Chamaeleontis cluster. Spectral types of the new members are estimated to be ∼M5, based on their TiO band strengths and broadband colors. With an age of 5-8 Myr for the cluster, masses of these new members are estimated to be ∼0.08 M☉. All three display strong Li 6708 Å absorption and Hα emission features, including one with an Hα emission equivalent width of ∼60 Å, along with He I 6678 and 7605 Å emission features that are characteristics of classical T Tauri stars.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Open Clusters and Associations: Individual: Name: η Chamaeleontis - Stars: Activity - Stars: Low-Mass, Brown Dwarfs - Stars: Pre-Main-Sequence

Nomenclature: Table 2: ECHA JHHMM.m+DDMM N=4 added.

Simbad objects: 26

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Number of rows : 26
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 THA MGr 00 00 -62.0           ~ 540 0
2 ECHA J0825.7-7929 * 08 25 41.6452451952 -79 29 11.797467216           ~ 1 0
3 2MASS J08303917-7818350 * 08 30 39.1518105264 -78 18 34.971319404           ~ 1 0
4 TYC 9398-1643-1 * 08 33 20.2207982304 -78 09 00.192086424   11.54 10.49     ~ 5 0
5 HD 74306 * 08 34 19.1086878144 -79 12 47.357580528   9.87 8.49     K2/3(III) 16 0
6 RECX 18 LM* 08 36 10.7009266536 -79 08 18.356133120     17.5     M5.5 40 0
7 RECX 17 LM* 08 38 51.4849263144 -79 16 13.752884532   16.82 16.4     M5.5 39 0
8 TYC 9398-1111-1 * 08 39 49.0185744744 -77 58 46.607249964   12.598 11.353     ~ 5 0
9 CPD-78 374 * 08 41 13.2580998696 -79 10 04.572824412   11.89 10.60     ~ 4 0
10 * eta Cha Pu* 08 41 19.5125857944 -78 57 48.105898056 5.02 5.351 5.453     B8V 246 0
11 2MASS J08415927-7851504 PM* 08 41 59.2775570616 -78 51 50.406692400           ~ 1 0
12 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
13 CD-78 343 * 08 44 05.0583990744 -78 55 28.940572812   11.11 9.91     ~ 5 0
14 RECX 16 LM* 08 44 09.1596371520 -78 33 45.774374724     18.4     M6.0 49 0
15 CD-78 345 * 08 44 26.8830830808 -79 24 40.686102684   11.25 10.42     ~ 1 0
16 TYC 9403-432-1 * 08 46 02.3693031432 -78 55 26.187376548   12.51 11.78     ~ 2 0
17 TYC 9403-135-1 * 08 46 53.5793464224 -79 37 19.132467528   12.46 11.40     ~ 2 0
18 2MASS J08484917-7848435 PM* 08 48 49.1861027448 -78 48 43.582234356           ~ 2 0
19 CD-78 348 * 08 50 17.6359283784 -78 28 59.807964468   10.54 9.42     G5 4 0
20 TYC 9403-1641-1 * 08 54 23.6845734120 -79 46 28.347793788   11.45 10.31     ~ 4 0
21 TYC 9403-108-1 * 08 55 10.6436783712 -79 19 33.698207172   11.40 10.20     ~ 5 0
22 TYC 9403-522-1 SB* 08 56 12.5604572376 -78 54 48.149514288   11.62 10.55     ~ 4 0
23 HD 84903 Pe* 09 47 19.2015403296 -41 27 04.199867280   9.10 8.04     GwA/F(V) 88 0
24 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
25 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 467 1
26 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0

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