CHAMELEON II - DISTANCE DETERMINATION AND HR DIAGRAM

被引：62

作者：

HUGHES, J ^{[1
]}

HARTIGAN, P ^{[1
]}

机构：

[1] UNIV MASSACHUSETTS,FIVE COLL ASTRON DEPT,AMHERST,MA 01003

来源：

ASTRONOMICAL JOURNAL | 1992年 / 104卷 / 02期

关键词：

D O I：

10.1086/116263

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present photometric and spectroscopic observations of the classical T Tauri stars in the Chamaeleon II dark cloud. The distance to Cha II is 200 +/- 20 pc, based on a plot of extinction versus distance for field stars seen against the cloud. The ages of the pre-main-sequence stars in Cha II range between 10(5) and 10(7) yr. The stellar population of the Cha II cloud consists mostly of low mass stars-at least 17 of the 19 known T Tauri stars in Cha II have masses less than 1M . . The only intermediate mass star in the cloud is IRAS 12496-7650, a highly embedded Herbig Ae star. The mass function of Cha II resembles that of the Lupus complex, and there are a larger fraction of low mass stars in Cha II than there are in the Taurus-Auriga region.

引用

页码：680 / 690

页数：11

共 24 条

[1] SPECTRAL EVOLUTION OF YOUNG STELLAR OBJECTS [J].

ADAMS, FC ;

LADA, CJ ;

SHU, FH .

ASTROPHYSICAL JOURNAL, 1987, 312 (02) :788-806

[2] HAMILTON ECHELLE SPECTRA OF YOUNG STARS .1. OPTICAL VEILING [J].

BASRI, G ;

BATALHA, C .

ASTROPHYSICAL JOURNAL, 1990, 363 (02) :654-669

[3] JHKLM PHOTOMETRY - STANDARD SYSTEMS, PASSBANDS, AND INTRINSIC COLORS [J].

BESSELL, MS ;

BRETT, JM .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1988, 100 (631) :1134-1151

[4] THE LATE-M DWARFS [J].

BESSELL, MS .

ASTRONOMICAL JOURNAL, 1991, 101 (02) :662-676

[5] UBVRI PHOTOMETRY .2. COUSINS VRI SYSTEM, ITS TEMPERATURE AND ABSOLUTE FLUX CALIBRATION, AND RELEVANCE FOR 2-DIMENSIONAL PHOTOMETRY [J].

BESSELL, MS .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1979, 91 (543) :589-607

[6] OBSERVATIONAL STUDIES OF PRE-MAIN-SEQUENCE EVOLUTION [J].

COHEN, M ;

KUHI, LV .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1979, 41 (04) :743-843

[7]

COHEN M, 1973, MNRAS, V164, P417

[8] A STUDY OF THE STELLAR POPULATION IN THE CHAMELEON DARK CLOUDS [J].

GAUVIN, LS ;

STROM, KM .

ASTROPHYSICAL JOURNAL, 1992, 385 (01) :217-231

[9] THE HERBIG-HARO OBJECTS IN THE CHAMAELEON-II DARK CLOUD [J].

GRAHAM, JA ;

HARTIGAN, P .

ASTRONOMICAL JOURNAL, 1988, 95 (04) :1197-&

[10] OPTICAL EXCESS EMISSION IN T-TAURI STARS [J].

HARTIGAN, P ;

KENYON, SJ ;

HARTMANN, L ;

STROM, SE ;

EDWARDS, S ;

WELTY, AD ;

STAUFFER, J .

ASTROPHYSICAL JOURNAL, 1991, 382 (02) :617-635

← 1 2 3 →