scholarly journals NGC 146: a young open cluster with a Herbig Be star and intermediate mass pre-main sequence stars

2005 ◽  
Vol 440 (2) ◽  
pp. 511-522 ◽  
Author(s):  
A. Subramaniam ◽  
D. K. Sahu ◽  
R. Sagar ◽  
P. Vijitha
Keyword(s):  
Main Sequence ◽  
Open Cluster ◽  
Main Sequence Stars ◽  
Intermediate Mass ◽  
Young Open Cluster ◽  
Be Star

scholarly journals Pre-main-sequence stars in the young open cluster NGC 1893

2007 ◽  
Vol 471 (2) ◽  
pp. 485-497 ◽  
Author(s):  
I. Negueruela ◽  
A. Marco ◽  
G. L. Israel ◽  
G. Bernabeu
Keyword(s):  
Main Sequence ◽  
Open Cluster ◽  
Main Sequence Stars ◽  
Young Open Cluster

scholarly journals Spectroscopic Investigations of the Main-Sequence B Stars in the Association Cas OB2 and the Open Cluster Platais 1 (C2128+488)

2000 ◽  
Vol 175 ◽  
pp. 71-74
Author(s):  
I.A. Usenko ◽  
V.V. Kovtjukh ◽  
S.M. Andrievsky ◽  
V.G. Klochkova ◽  
V.E. Panchuk ◽  
...  
Keyword(s):  
Main Sequence ◽  
Open Cluster ◽  
Special Astrophysical Observatory ◽  
Atmospheric Parameters ◽  
Main Sequence Stars ◽  
B Stars ◽  
Elemental Abundances ◽  
Be Star ◽  
Academy Of Sciences ◽  
Echelle Spectrometer

AbstractA spectroscopic investigation of four main-sequence stars in the association Cas OB2 (HD 17327A and B, HD 16893, HD 17443) and of two stars in the open cluster Platais 1 (No. 1 (1921) and No. 111 (1600)) was carried out using high-resolution CCD spectra, obtained with echelle-spectrometer ”LYNX” (6-m telescope, Special Astrophysical Observatory, Russian Academy of Sciences). We have determined the atmospheric parameters for the program stars, their projected rotational velocities and elemental abundances in their atmospheres. Two new HgMn stars - HD 17327A and Platais No. 1 - were detected. HD 17443 is not a Be star.

scholarly journals A CONSTRAINT ON THE FORMATION TIMESCALE OF THE YOUNG OPEN CLUSTER NGC 2264: LITHIUM ABUNDANCE OF PRE-MAIN SEQUENCE STARS

2016 ◽  
Vol 831 (2) ◽  
pp. 116 ◽  
Author(s):  
Beomdu Lim ◽  
Hwankyung Sung ◽  
Jinyoung S. Kim ◽  
Michael S. Bessell ◽  
Narae Hwang ◽  
...  
Keyword(s):  
Main Sequence ◽  
Open Cluster ◽  
Main Sequence Stars ◽  
Lithium Abundance ◽  
Young Open Cluster

ACCRETION RATES ON PRE-MAIN-SEQUENCE STARS IN THE YOUNG OPEN CLUSTER NGC 6530

2011 ◽  
Vol 143 (1) ◽  
pp. 18 ◽  
Author(s):  
José Gallardo ◽  
Luciano del Valle ◽  
María Teresa Ruiz
Keyword(s):  
Main Sequence ◽  
Open Cluster ◽  
Main Sequence Stars ◽  
Accretion Rates ◽  
Young Open Cluster

scholarly journals TheGaia-ESO Survey: pre-main-sequence stars in the young open cluster NGC 3293

2016 ◽  
Vol 460 (3) ◽  
pp. 3305-3315
Author(s):  
A. J. Delgado ◽  
L. Sampedro ◽  
E. J. Alfaro ◽  
M. T. Costado ◽  
J. L. Yun ◽  
...  
Keyword(s):  
Main Sequence ◽  
Open Cluster ◽  
Main Sequence Stars ◽  
Young Open Cluster

scholarly journals IPHAS A-type Stars with Mid-IR Excesses in Spitzer Surveys

2009 ◽  
Vol 5 (H15) ◽  
pp. 815-815
Author(s):  
Antonio S. Hales ◽  
Michael J. Barlow ◽  
Janet E. Drew ◽  
Yvonne C. Unruh ◽  
Robert Greimel ◽  
...  
Keyword(s):  
Cross Correlation ◽  
Main Sequence ◽  
Terrestrial Planet ◽  
Circumstellar Disks ◽  
Main Sequence Stars ◽  
Intermediate Mass ◽  
Mid Infrared ◽  
Isaac Newton ◽  
Intermediate Mass Stars ◽  
Dust Disks

AbstractThe Isaac Newton Photometric H-Alpha Survey (IPHAS) provides (r′-Hα)-(r′-i′) colors, which can be used to select AV0-5 Main Sequence star candidates (age~20-200 Myr). By combining a sample of 23050 IPHAS-selected A-type stars with 2MASS, GLIMPSE and MIPSGAL photometry we searched for mid-infrared excesses attributable to dusty circumstellar disks. Positional cross-correlation yielded a sample of 2692 A-type stars, of which 0.6% were found to have 8-μm excesses above the expected photospheric values. The low fraction of main sequence stars with mid-IR excesses found in this work indicates that dust disks in the terrestrial planet zone of Main Sequence intermediate mass stars are rare. Dissipation mechanisms such as photo-evaporation, grain growth, collisional grinding or planet formation could possibly explain the depletion of dust detected in the inner regions of these disks.

Angular momentum transport in pre-main-sequence stars of intermediate mass

Solar Physics ◽  
1990 ◽  
Vol 128 (1) ◽  
pp. 287-298 ◽  
Author(s):  
C. Vigneron ◽  
A. Mangeney ◽  
C. Catala ◽  
E. Schatzman
Keyword(s):  
Angular Momentum ◽  
Main Sequence ◽  
Momentum Transport ◽  
Main Sequence Stars ◽  
Intermediate Mass ◽  
Angular Momentum Transport

scholarly journals Small and Intermediate Mass Stellar Evolution - Main Sequence and Close to It

1993 ◽  
Vol 137 ◽  
pp. 410-425 ◽  
Author(s):  
A. Noels ◽  
N. Grevesse
Keyword(s):  
Mass Loss ◽  
Stellar Evolution ◽  
Turbulent Diffusion ◽  
Main Sequence ◽  
Main Sequence Stars ◽  
Intermediate Mass ◽  
Physical Mechanisms ◽  
Standard Models

AbstractWe present the standard models for small and intermediate main sequence stars and we discuss some of the problems arising with semiconvection and overshooting. The surface abundance of Li serves as a test for other physical mechanisms, including microscopic and turbulent diffusion, rotation and mass loss.

scholarly journals A Rotational Period Study of a Large Sample of Pre-Main Sequence stars in NGC 2264

2004 ◽  
Vol 215 ◽  
pp. 125-126 ◽  
Author(s):  
M. Lamm ◽  
C.A.L. Bailer-Jones ◽  
R. Mundt ◽  
W. Herbst
Keyword(s):  
Main Sequence ◽  
Open Cluster ◽  
Monitoring Program ◽  
Bimodal Distribution ◽  
Main Sequence Stars ◽  
Lower Mass ◽  
Rotation Periods ◽  
Photometric Monitoring ◽  
Pms Stars ◽  
Mass Dependent

We present the results of a photometric monitoring program of pre-main sequence (PMS) stars in the young (2-4 Myr) open cluster NGC 2264 (d=700 pc). We find that the rotation periods are mass dependent and show a bimodal distribution for higher mass stars with M ≳ 0.3 M⊙ and a unimodal distribution for lower mass stars with M ≲ 0.3 M⊙.

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