Results 51 to 60 of about 14,196,004 (190)

Pulsation in pre-main sequence stars [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractAsteroseismology has been proven to be a successful tool to unravel details of the internal structure for different types of stars in various stages of evolution well after birth. We can now show that it has similar power for pre-main sequence (pre-MS) objects.
openaire   +1 more source

Spectral Biases, Starspot Morphology, and Dynamo Transitions on the Pre-main Sequence: Insights from the X-Shooter WTTS Library

The Astrophysical Journal
Starspots are ubiquitous in young, low-mass stars, yet their impact on the spectral classification and fundamental parameter inference of pre-main-sequence stars (PMS) has been largely overlooked.
Facundo Pérez Paolino, Jeffrey S. Bary, Lynne A. Hillenbrand, Benjamin Horner, Adolfo Carvalho   +4 more
doaj   +1 more source

PENELLOPE

Astronomy & Astrophysics
We conducted a homogeneous chemical analysis of pre-main sequence stars with effective temperatures ranging from ∼3000 K to ∼5500 K in eight nearby star-forming regions (SFRs): Chamaeleon I, η Chamaeleonis, Lupus, Orion OB1a, Orion OB1b, σ Orionis ...
Carini R., Biazzo K., Frasca A., Manara C. F., Alcalá J. M., Ábráham P., Campbell-White J., Claes R., Fang M., Gangi M., Gameiro J. F., Kóspál Á., Mauco K., Mendigutía I., Nisini B., Robberto M., Robinson C. E., Schneider C., Siwak M., Sperling T., Tychoniec L., Venuti L.   +21 more
doaj   +1 more source

The pre-main-sequence star IP Persei [PDF]

Astronomy & Astrophysics, 2001
We present the results of high- and low-resolution spectroscopic and broadband multicolour photometric observations of the emission-line A-type star IP Per. Significant variations of the Balmer line profiles and near-IR brightness are detected.
A. S. Miroshnichenko, K. S. Bjorkman, E. L. Chentsov, V. G. Klochkova, R. O. Gray, P. García-Lario, J. V. Perea Calderón   +6 more
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A Distributed Population of Low-Mass Pre-Main-Sequence Stars near the Taurus Molecular Clouds [PDF]

, 2006
We present a drift-scan survey covering a ~5° × 50° region toward the southern portion of the Taurus-Auriga molecular cloud. Data taken in the B,R,I filters with the Quest-2 camera on the Palomar 48 inch (1.2 m) Samuel Oschin Telescope were combined with
Mamajek, Eric E., Catherine L. Slesnick, Lynne A. Hillenbrand, Eric E. Mamajek, Carpenter, John M., Hillenbrand, Lynne A., John M. Carpenter, Slesnick, Catherine L.   +7 more
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Probing the Circumstellar Structure of Pre-main Sequence Stars [PDF]

, 2003
8 pages; 8 figures; to appear in:"Open Issues in Local Star Formation and Early Evolution"
Vink, Jorick S., Drew, Janet E., Harries, Tim J., Oudmaijer, Rene D.   +3 more
openaire   +2 more sources

Orbital motion and dynamical mass of the complex periodic variable binary system 2MASS J05082729–2101444

Astronomy & Astrophysics
Aims. This study focuses on the low-mass binary 2MASS J05082729-2101444 (2M0508-21), one of the few known radio-loud members of the complex periodic variable sample. Our aim is to use very long baseline interferometry to constrain the orbit. Methods.
Curiel S., Ortiz-León G. N., Béjar V. J. S., Viganò D., Girart J. M., Kaur S., Shan Y., Murgas F., Zechmeister M., Amado P. J., Caballero J. A., Henning Th., Ilin E., Montes D., Morales J. C., Morata Ò., Pérez-Torres M., Quirrenbach A., Reiners A., Ribas I., Sánchez-Monge Á., Schweitzer A., Vico Linares J. I., Zapatero Osorio M. R.   +23 more
doaj   +1 more source

The potential of space observations for pulsating pre-main sequence stars

EPJ Web of Conferences, 2017
The first asteroseismic studies of pre-main sequence (pre-MS) pulsators have been conducted based on data from the space telescopes MOST and CoRoT with typical time bases of less than 40 days.
Zwintz Konstanze
doaj   +1 more source

Chemically peculiar stars on the pre-main sequence [PDF]

Context. The chemically peculiar (CP) stars of the upper main sequence are defined by spectral peculiarities that indicate unusual elemental abundance patterns in the presence of diffusion in the calm, stellar atmospheres.
Faltová, N., Jadlovský, D., Svačinková, K., M. Vítková, Xia, C., Hümmerich, S., Vítková, M., S. Hümmerich, L. Kueß, M. Mesarč, Kueß, L., N. Faltová, M. Labaj, Ramezani, T., K. Svačinková, K. Bernhard, P. Mondal, Mesarč, M., Mondal, P., Prišegen, M., D. Jadlovský, C. Xia, E. Paunzen, J. Supíková, Supíková, J., Bernhard, K., M. Prišegen, Paunzen, E., Labaj, M., T. Ramezani   +29 more
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Active Young Stars in the LAMOST–Kepler Survey

The Astrophysical Journal Supplement Series
In the early stages of their lives, young stars harbor diverse processes exhibiting strong signatures, making them ideal targets for investigating stellar accretion, dynamo actions, and exoplanet formation.
FuKun Xu, Shenghong Gu, Yue Xiang
doaj   +1 more source