Results 21 to 30 of about 85,147 (265)

Radiative Wind Acceleration in Early Type Stars [PDF]

International Astronomical Union Colloquium, 1981
AbstractThe processes of radiative acceleration of stellar winds in OB stars by single and multiple photon scattering are considered. Single scattering can be the dominant accelerating process for stars later than B2 (Teff < 2 x 104 K) and can account for terminal velocities up to 500 – 1000 km s-1 . Multiple scattering of photons in the approximate
N. Panagia, F. Macchetto
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Early Type Stars [PDF]

Nature, 1967
The Early Type Stars By Anne B. Underhill. (Astrophysics and Space Science Library, Vol. 6.) Pp. xiii + 282. (Dordrecht: D. Reidel Publishing Company, 1966.) 52 D. florins.
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Polarimetry of Southern Peculiar Early-Type Stars [PDF]

Astronomy and Astrophysics Supplement Series, 1998
An important factor is the relation of HAEBE stars with other groups of peculiar early type stars, such as Be and B[e] stars, luminous blue variables (LBVs) etc. In many cases Polarimetric properties of HAEBE stars and B[e] (Be) stars are similar. We have carried out a Polarimetric study of peculiar early-type stars with the following aims: 1 ...
R. V. Yudin, A. Evans
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The Theory of Winds in Early Type Stars [PDF]

International Astronomical Union Colloquium, 1981
I assume that the purpose of this review of the theory of winds from early type stars is to summarize the way in which the mass loss rate of a star may be included in a calculation of stellar evolution. Let me summarize my conclusions. It is not possible. One can only use estimates of mass loss rates obtained from the observations.
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Binary stars and the UVX in early-type galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
9 pages, 2 figures.
Hernández-Pérez, Fabiola, Bruzual, Gustavo   +1 more
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Radial velocities of early-type stars [PDF]

Symposium - International Astronomical Union, 1970
With the Fehrenbach objective prism radial velocities of about 700 stars of type B0 to A0 were determined in two fields of the Southern Milky Way (lII = 295° bII = −0.6°; lII = 320° bII = −2.5°), with a mean error of ±20 km s−1. An additional photographic UBV-photometry with plates of the ADH-telescope at Boyden Observatory was accomplished.
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Evolution of brightness and magnetic features of young solar-type stars – II. The young F8 star HIP 71933 [PDF]

, 2023
The early, active history of our Sun is still not fully understood. Observations of the magnetic fields on active young solar-type stars allow us an insight into the early evolution of our Sun.
Waite, I A, Perugini, G M, Burton, D M, S C Marsden, I A Waite, Hughes, J E, Marsden, S C, J E Hughes, B D Carter, D M Burton, E M Hébrard, Carter, B, Hebrard, E M, G M Perugini   +13 more
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A BCool magnetic snapshot survey of solar-type stars [PDF]

, 2014
SVJ acknowledges research funding by the Deutsche Forschungsgemeinschaft (DFG) under grant SFB 963/1, project A16. JM was funded by a fellowship of the Alexander von Humboldt Foundation in Göttingen.
Jeffers, S., Ramirez-Velez, J. C., Reiners, Ansgar, Carter, B.D., Donati, J. -F., Jardine, M., do Nascimento, J.-D., Collaboration, The Bcool, Petit, P., Dintrans, B.D., Ramirez-Vèlez, J., Marsden, S., do Nascimento Jr., J., Dintrans, B., Ramirez-Veles, J.C., Donati, J., Carter, Brad D., Auriere, M., Lignieres, F., Nascimento, J. D. Do, Marsden, S. C., Van Grootel, V., Morin, J., do Nascimento, J.-D., Jr., Bouvier, J., Jeffers, Sandra V., Fares, R., Theado, S., Gastine,, Gastine, Thomas, Morin, Julien, Donati, J.-F., Van Grootel, Valérie, BCool Collaboration, do Nascimento Jr., J.-D., Lanoux, J., Morgenthaler, A., Konstantinova-Antova, R., Reiners, A., Jeffers, S.V., Jeffers, S. V., Catala, C., Gastine, T., do Nascimento, J. -D., Carter, B. D., Marsden, S.C., Carter, B., Collaboration, T.   +47 more
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Magnetic Doppler imaging of early-type stars

, 2010
Doppler imaging of early-type magnetic stars is the most advanced method to interpret their line profile variations. DI allows us to study directly a complex interplay between chemical spots, magnetic fields, and the mass loss.
Iosif Romanyuk, Kochukhov, Oleg,, Mary E. Oksala, Romanyuk, Iosif, Thomas Rivinius, Rivinius, Thomas, Oksala, Mary E., Oleg Kochukhov   +7 more
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VLT/SPHERE survey for exoplanets around young early-type stars, including systems with multi-belt architectures [PDF]

, 2020
Context. Dusty debris disks around pre- and main-sequence stars are potential signposts for the existence of planetesimals and exoplanets. Giant planet formation is therefore expected to play a key role in the evolution of the disk.
Marleau, G-D., Rojo Rubke, Patricio, Bonnefoy, Mickael, Bonnefoy, M., Beust, Herve, Mordasini, Christoph, Lagrange, A.-M., Allard, F., G-D. Marleau, Boccaletti, A., Galicher, R., Bayo, Alberto, Lagadec, E., C. Lazzoni, Boccaletti, Anthony, Delorme, P., Jenkins, James Stewart, Laibe, G., Desidera, Silvano, E. Lagadec, F. Allard, M. Bonnefoy, Girard, J., Lombart, M., Delorme, Philippe, Girard, Julien, Mordasini, C., Rojo, P., A. -M. Lagrange, J. Girard, M. Lombart, H. Beust, Lombart, Maxime, Bonavita, M., G. Chauvin, A. Bayo, P. Rojo, R. Galicher, Bayo, A., Marleau, Gabriel Dominique, Beust, H., Lagrange, Anne Marie, Chauvin, G., D. Minniti, Minniti, D., Jenkins, J.S., Jenkins, J. S., M. Bonavita, Gratton, R., S. Desidera, Mesa, Dino, G. Laibe, Mesa, D., C. Mordasini, Marleau, G.-D., Allard, France, A.-M. Lagrange, J. S. Jenkins, P. Delorme, A. Boccaletti, Desidera, S., Lagadec, Eric, Minniti, Dante, H. Klahr, D. Mesa, Gratton, Raffaele, Chauvin, Gael Epely, R. Gratton, Galicher, Raphael, Bonavita, Mariangela, Klahr, H., Lazzoni, C.   +71 more
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