On age spreads in star-forming regions

被引：176

作者：

Hartmann, L ^{[1
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

ASTRONOMICAL JOURNAL | 2001年 / 121卷 / 02期

关键词：

circumstellar matter; stars : formation; stars : pre-main-sequence;

D O I：

10.1086/318770

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

I consider current observational constraints on age spreads in star-forming regions and recent attempts to infer the star-forming histories of molecular cloud complexes. My analysis concentrates on low-mass pre-main-sequence stars on Hayashi tracks, which constitute the bulk of the stellar population. Current observational and theoretical uncertainties probably preclude any robust inferences of the detailed variation of star formation rates as a function of time. These results do not change the conclusion, supported again recently by the systematic study of Palla & Stahler, that star formation is rapid.

引用

页码：1030 / 1039

页数：10

共 48 条

[1] Turbulent flow-driven molecular cloud formation:: A solution to the post-T tauri problem? [J].

Ballesteros-Paredes, J ;

Hartmann, L ;

Vázquez-Semadeni, E .

ASTROPHYSICAL JOURNAL, 1999, 527 (01) :285-297

[2]

Baraffe I, 1998, ASTRON ASTROPHYS, V337, P403

[3] A SURVEY FOR CIRCUMSTELLAR DISKS AROUND YOUNG STELLAR OBJECTS [J].

BECKWITH, SVW ;

SARGENT, AI ;

CHINI, RS ;

GUSTEN, R .

ASTRONOMICAL JOURNAL, 1990, 99 (03) :924-945

[4]

BLAAUW A, 1991, NATO ADV SCI I C-MAT, V342, P125

[5] X-ray surveys and the post-T Tauri problem [J].

Briceno, C ;

Hartmann, LW ;

Stauffer, JR ;

Gagne, M ;

Stern, RA ;

Caillault, JP .

ASTRONOMICAL JOURNAL, 1997, 113 (02) :740-751

[6] A search for very low mass pre-main-sequence stars in Taurus [J].

Briceno, C ;

Hartmann, L ;

Stauffer, J ;

Martin, E .

ASTRONOMICAL JOURNAL, 1998, 115 (05) :2074-2091

[7] The CIDA-QUEST large-scale survey of Orion OB1:: Evidence for rapid disk dissipation in a dispersed stellar population [J].

Briceño, C ;

Vivas, AK ;

Calvet, N ;

Hartmann, L ;

Pacheco, R ;

Herrera, D ;

Romero, L ;

Berlind, P ;

Sánchez, G ;

Snyder, JA ;

Andrews, P .

SCIENCE, 2001, 291 (5501) :93-96

[8] A large-scale objective-prism and X-ray survey in Taurus-Auriga [J].

Briceño, C ;

Calvet, N ;

Kenyon, S ;

Hartmann, L .

ASTRONOMICAL JOURNAL, 1999, 118 (03) :1354-1368

[9]

BROWN AGA, 1994, ASTRON ASTROPHYS, V289, P101

[10] The structure and emission of the accretion shock in T Tauri stars [J].

Calvet, N ;

Gullbring, E .

ASTROPHYSICAL JOURNAL, 1998, 509 (02) :802-818

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