Results 21 to 30 of about 85,442 (265)

Early-Type Magnetic Stars

The Astrophysical Journal, 1968
Surface magnetic field variations in early stars, suggesting mechanism for magnetic energy transfer from convective core to ...
A. Finzi, R. A. Wolf
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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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The Cosmic Near Infrared Background: Remnant Light From Early Stars [PDF]

, 2008
The redshifted ultraviolet light from early stars at z similar to 10 contributes to the cosmic near infrared background (NIRB). We present detailed calculations of its spectrum with various assumptions about metallicity and mass spectrum of the early ...
Eiichiro Komatsu, Komatsu, E., Fernandez, E. R., Elizabeth R. Fernandez   +3 more
core   +2 more sources

CNO abundances in Early Type Be Stars [PDF]

Symposium - International Astronomical Union, 2004
High dispersion spectra in the visible range were obtained for field Be Stars in both hemispheres. As Be Stars form a class of Main Sequence fast rotators, we are intended to test how their chemical composition can be affected by rotation.
Y. Frémat, J. Zorec, R. Levenhagen, N. Leister, A.-M. Hubert, M. Floquet, C. Neiner   +6 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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The properties of early-type stars in the Magellanic Clouds [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractThe past decade has witnessed impressive progress in our understanding of the physical properties of massive stars in the Magellanic Clouds, and how they compare to their cousins in the Galaxy. I summarise new results in this field, including evidence for reduced mass-loss rates and faster stellar rotational velocities in the Clouds, and their ...
openaire   +2 more sources

Ultraviolet Spectrophotometry of Early-Type Stars [PDF]

Symposium - International Astronomical Union, 1976
The ultraviolet spectra of B stars obtained with the sky scan telescope in the TD1 satellite have been used to obtain narrow-band magnitudes at several wavelengths. These photometric bands have an effective half-width of 100 Å. We have proposed a two-dimensional classification scheme based on ultraviolet colours, and some preliminary results are ...
K. Nandy, G. I. Thompson, C. M. Humphries   +2 more
openaire   +1 more source

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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Mass Loss from Early-Type Stars [PDF]

Symposium - International Astronomical Union, 1970
Following the detailed study of four very high luminosity OB stars, a survey has been made for spectroscopic evidence of mass loss in a number of early-type supergiants. A list of spectroscopic criteria is given and the mass loss estimates for 24 stars plotted on the HR diagram.
openaire   +1 more source

Early assembly of the most massive galaxies [PDF]

, 2009
The current consensus is that galaxies begin as small density fluctuations in the early Universe and grow by in situ star formation and hierarchical merging(1).
Chris A. Collins, Scott T Kay (16045382), Nicola Mehrtens (16047884), Ed Lloyd-Davies, Hoyle, Ben, Hosmer, Mark, Christopher J. Miller, Ben Hoyle, Mehrtens, Nicola, Robert G. Mann, Pedro T. P. Viana, Martin Sahlén (267044), S Adam Stanford (16061237), Mark Hosmer (16070585), Robert C Nichol (16067396), John P Stott (16070582), Martin Sahlén, Sahlen, Martin, John P. Stott, Kathy Romer (4460893), Matt Hilton (6956609), Viana, Pedro T. P., Mann, Robert G., Ben Hoyle (6914513), Stott, John P., Matt Hilton, Robert G Mann (7965452), Andrew Liddle, Stanford, S. Adam, Christopher J Miller (16070591), A. Kathy Romer, Davidson, Michael, Ed Lloyd-Davies (16075100), Romer, A. Kathy, Robert C. Nichol, Andrew Liddle (16042793), Pedro T P Viana (16045379), Nichol, Robert C., Kay, Scott T., Michael J. West, Chris A Collins (16061234), Scott T. Kay, Collins, Chris A., Michael Davidson, Mark Hosmer, West, Michael J., Michael Davidson (699678), S. Adam Stanford, Michael J West (5524436), Liddle, Andrew, Nicola Mehrtens, Miller, Christopher J., Hilton, Matt, Lloyd-Davies, Ed   +53 more
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