A search for T Tauri stars in high-latitude molecular clouds. I - IRAS sources and CCD imaging

1990 ◽  
Vol 357 ◽  
pp. 602 ◽  
Author(s):  
Loris Magnani ◽  
Jean-Pierre Caillault ◽  
Lee Armus
Keyword(s):  
High Latitude ◽  
Molecular Clouds ◽  
T Tauri Stars ◽  
Ccd Imaging ◽  
T Tauri

A search for T Tauri stars in high-latitude molecular clouds. 2: The IRAS Faint Source Survey catalog

1995 ◽  
Vol 96 ◽  
pp. 159 ◽  
Author(s):  
Loris Magnani ◽  
Jean-Pierre Caillault ◽  
Ari Buchalter ◽  
C. A. Beichman
Keyword(s):  
High Latitude ◽  
Molecular Clouds ◽  
T Tauri Stars ◽  
T Tauri

scholarly journals The IC 2118 association: New T Tauri stars in high-latitude molecular clouds

2004 ◽  
Vol 418 (1) ◽  
pp. 89-98 ◽  
Author(s):  
M. Kun ◽  
T. Prusti ◽  
S. Nikolić ◽  
L. E. B. Johansson ◽  
N. A. Walton
Keyword(s):  
High Latitude ◽  
Molecular Clouds ◽  
T Tauri Stars ◽  
T Tauri

scholarly journals Star Formation at High Galactic Latitude: A Case for Extensions to the Hα Survey

1998 ◽  
Vol 15 (1) ◽  
pp. 155-156 ◽  
Author(s):  
Kristen A. Larson
Keyword(s):  
Star Formation ◽  
High Latitude ◽  
T Tauri Stars ◽  
Young Stellar Objects ◽  
Galactic Latitude ◽  
Stellar Objects ◽  
High Galactic Latitude ◽  
T Tauri

AbstractThe AAO/UKST Hα Survey should be extended to high Galactic latitude (∣b∣ > 25°) to search for T Tauri stars. The Hα Survey can contribute to a complete inventory of young stellar objects in high-latitude clouds, which will help define the limits of conditions and processes that lead to star formation.

Recent Results on Associations: Anatomy of CMa OB1 and Mon OB1

1980 ◽  
Vol 85 ◽  
pp. 33-49 ◽  
Author(s):  
William Herbst
Keyword(s):  
Molecular Clouds ◽  
Line Emission ◽  
T Tauri Stars ◽  
Molecular Line ◽  
Dark Clouds ◽  
T Tauri ◽  
Sky Survey ◽  
Objective Prism ◽  
Cloud Complex ◽  
Reflection Nebulae

Three types of associations are presently recognized. These are OB, R, and T, and represent, respectively, concentrations of O and B type stars, reflection nebulae, and T Tauri stars, in certain regions of the sky. OB and T associations are identified on objective prism plates; R associations may be found using direct plates such as those of the Palomar Sky Survey. All associations are intimately connected with what appear optically as dark clouds and are now detected as sources of molecular line emission and known as molecular clouds. Often, all three types of associations are found within the same cloud complex (eg, Mon OB1). However, there are also examples of T associations (Taurus) and R associations (Mon R2) which are not connected with recognized OB associations.

scholarly journals The Interaction of T-Tauri Stars with Molecular Clouds

1980 ◽  
Vol 87 ◽  
pp. 165-172 ◽  
Author(s):  
Joseph Silk ◽  
Colin Norman
Keyword(s):  
Star Formation ◽  
Molecular Clouds ◽  
T Tauri Stars ◽  
Mass Star ◽  
Internal Source ◽  
Low Mass Stars ◽  
Dark Cloud ◽  
Nearby Star ◽  
T Tauri ◽  
Low Mass

Winds from T-Tauri stars may provide an important dynamical input into cold molecular clouds. If the frequency of T-Tauri stars exceeds 20 pc-3, wind-driven shells collide and form ram pressure confined clumps. The supersonic clump motions can account for cloud line widths. Clumps collide inelastically, coalescing and eventually becoming Jeans unstable. For characteristic dark cloud temperatures low mass stars form, and we speculate that in this manner clouds can be self-sustaining for 107 − 108 yr. Only when either the gas supply is exhausted or an external trigger stimulates massive star formation (for example, by heating the cloud or enhancing the clump collision rate), will the cloud eventually be disrupted. A natural consequence of this model is that dark cloud lifetimes are identified with the duration of low mass star formation, inferred to exceed 107 yr from studies of nearby star clusters. Other implications include the prediction of the existence of embedded low mass stars in turbulent cloud cores, the presence of an internal source of radiation in dark clouds, and a clumpy structure for cold molecular clouds.

scholarly journals NARROW Na AND K ABSORPTION LINES TOWARD T TAURI STARS: TRACING THE ATOMIC ENVELOPE OF MOLECULAR CLOUDS

2015 ◽  
Vol 814 (1) ◽  
pp. 14 ◽  
Author(s):  
I. Pascucci ◽  
S. Edwards ◽  
M. Heyer ◽  
E. Rigliaco ◽  
L. Hillenbrand ◽  
...  
Keyword(s):  
Molecular Clouds ◽  
T Tauri Stars ◽  
Absorption Lines ◽  
T Tauri

scholarly journals NMA Imaging of Envelopes and Disks around Low Mass Protostars and T Tauri Stars

1997 ◽  
Vol 182 ◽  
pp. 381-390
Author(s):  
Yoshimi Kitamura ◽  
Masao Saito ◽  
Ryohei Kawabe ◽  
Kazuyoshi Sunada
Keyword(s):  
Accretion Disks ◽  
Molecular Clouds ◽  
Protoplanetary Disks ◽  
Hierarchical Structures ◽  
T Tauri Stars ◽  
Mass Star ◽  
Low Mass Stars ◽  
Star Forming ◽  
T Tauri ◽  
Low Mass

We are intensively studying low mass star formation with the radio telescopes at Nobeyama in Japan. Using both the Nobeyama 45 m dish equipped with a 2 × 2 array receiver and the Nobeyama Millimeter Array (NMA), we can cover a very wide spatial range from overall molecular clouds down to compact protoplanetary disks. With the 45 m dish we are investigating hierarchical structures of molecular clouds including star-forming cores. With NMA we are imaging disklike structures (i.e., envelopes, accretion disks, and protoplanetary disks) around protostars and T Tauri stars. Recently, we have completed our survey for dense disklike envelopes around eleven Class 0 & I protostars by NMA. In this paper, we will present our recent results of the disklike envelopes in addition to the previous NMA results of the disks around three T Tauri stars. On the basis of the data, we will discuss the evolution of the disklike structures (dense envelopes → tenuous ones → dispersing ones → accretion disks → protoplanetary ones), and propose a new scenario for the formation of low mass stars.

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