Results 11 to 20 of about 85,147 (265)

Magnetic Fields of F-Type Stars [PDF]

, 2022
Magnetic fields are an observable feature of many stars, with warm, F-type stars of interest in searching for the transition from the fossil fields in hot stars to dynamos in cool stars driven by convection zones.
Seach, John M.
core   +1 more source

Convective Penetration in Early-type Stars

The Astrophysical Journal, 2022
Abstract Observations indicate that the convective cores of stars must ingest a substantial amount of material from the overlying radiative zone, but the extent of this mixing and the mechanism that causes it remain uncertain. Recently, Anders et al.
Adam S. Jermyn, Evan H. Anders, Daniel Lecoanet, Matteo Cantiello   +3 more
openaire   +2 more sources

Spectrophotometry of early type stars [PDF]

, 1969
A photoelectric spectrum scanner attached to the 16-inch telescope of the Cerro Tololo Inter-American Observatory was used to determine the relative spectral intensity distribution for early type stars. Observations on a minimun of three nights per star have been obtained for about two hundred stars. The tracings extend from 3100 Å to 6000 Å. They were
Gutiérrez-Moreno, A., Moreno, H., Stock, J   +2 more
openaire   +2 more sources

The magnetic fields, activity and hidden companions of solar-type stars [PDF]

, 2023
The magnetic fields of the Sun and other solar-type stars manifest in a range of observable surface phenomena that provide insight into the magnetic dynamos operating within, but also hamper the detection of exoplanets.
Brown, Emma
core   +1 more source

Three new brown dwarfs and a massive hot Jupiter revealed by TESS around early-type stars [PDF]

, 2022
Context. The detection and characterization of exoplanets and brown dwarfs around massive AF-type stars is essential to investigate and constrain the impact of stellar mass on planet properties.
Kevin I. Collins, Adrien Deline, Grieves, Nolan, Srdoc, Gregor, Richard P. Schwarz, Giacalone, Steven, James S. Jenkins, Don J. Radford, Alexander Rudat, Duncan J. Wright, Galland, Franck, Alexis Heitzmann, Ting, Eric B., Matthew J. Hooton, Tianjun Gan, Jon Otegi, Heitzmann, Alexis, Yinan Zhao, Ian J. M. Crossfield, Peña Rojas, Pablo A., Eric B. Ting, Gan, Tianjun, Galland, Frank, Steven Giacalone, François Bouchy, Jon M. Jenkins, Michael B. Lund, Radford, Don J., Courtney D. Dressing, Addison, Brett, Ulmer-Moll, Solène, Theron Carmichael, Bieryla, Allyson, Deline, Adrien, Zhao, Yinan, Stéphane Udry, Rafael Brahm, Ismael Mireles, George Zhou, Yanzhe Zhang, Monika Lendl, Cointepas, Marion, Franck Galland, Jessie L. Christiansen, Samuel Gill, Latham, David W., Phil Evans, Collins, Kevin I., Wittenmyer, Robert A., Brahm, Rafael, Crossfield, Ian J. M., Christiansen, Jessie L., Robert A. Wittenmyer, Pablo A. Peña Rojas, Olga Suarez, Keivan G. Stassun, David W. Latham, Gill, Samuel, Psaridi, Angelica, Collins, Karen A., Carmichael, Theron, Hooton, Matthew J., Angelica Psaridi, Hooton, Matthew J., Dressing, Courtney D., Rudat, Alexander, Joseph E. Rodriguez, Addison Brett, Lund, Michael B., Lendl, Monika, Zhou, George, Brett Addison, Dany Mounzer, Jenkins, Jon M., Schlieder, Joshua E., Wright, Duncan J., Allyson Bieryla, Suarez, Olga, Karen A. Collins, Marion Cointepas, Wittenmyer Robert A., Shporer, Avi, Schwarz, Richard P., Otegi, Jon, Gregor Srdoc, Stassun, Keivan G., Avi Shporer, Solène Ulmer-Moll, Bouchy, François, Brahm, Rafael, Mireles, Ismael, Stockdale, Chris, Zhang, Yanzhe, Jenkins, James S., Chris Stockdale, Rodriguez, Joseph E., Nolan Grieves, Evans, Phil, Joshua E. Schlieder, Udry, Stéphane, Mounzer, Dany   +100 more
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XMM-Newton X-ray study of early type stars in the Carina OB1 association [PDF]

, 2007
<p><b>Aims:</b> X-ray properties of the stellar population in the Carina OB1 association are examined with special emphasis on early-type stars.
I. I. Antokhin, J. C. Brown, Rauw, G., G. Rauw, J.-M. Vreux, Antokhin, I. I., Antokhin, I.I., Brown, J.C., van der Hucht, K.A., Rauw, Grégor, K. A. van der Hucht, Vreux, Jean-Marie, Vreux, J.M., van der Hucht, K. A., Brown, J. C.   +14 more
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Early-Type Stars [PDF]

Astrophysics and Space Science, 1995
Away from the young disk, several classes of early type stars are found. They include (i) the old, metal-poor blue horizontal branch stars of the halo and the metal-poor tail of the thick disk; (ii) metal-rich young A stars in a rapidly rotating subsystem but with a much higher velocity dispersion than the A stars of the young disk, and (iii) a newly ...
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A revisit to agglomerates of early‐type Hipparcos stars [PDF]

Astronomische Nachrichten, 2008
AbstractWe study the spatial structure and sub‐structure of regions rich in Hipparcos stars with blue BT – VT colours. These regions, which comprise large stellar complexes, OB associations, and young open clusters, are tracers of on‐going star formation in the Galaxy.
Caballero, J. A., Dinis, L.
openaire   +2 more sources

A magnetic snapshot survey of F-type stars [PDF]

, 2020
International audienceWe present a spectropolarimetric magnetic snapshot survey of 55 stars which includes 53 F-type stars ranging from spectral types F0 to F9 plus 2 chemically peculiar stars β CrB, and δ Cap.
Buysschaert, B., Folsom, C. P., Mengel, M. W., Neiner, C., Seach, J. M., Oksala, M. E., Marsden, S. C., Carter, B. D.   +7 more
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STAR FORMATION BIMODALITY IN EARLY-TYPE GALAXIES [PDF]

The Astrophysical Journal, 2014
We compute the properties of a sample of 221 local early-type galaxies with a spectral energy distribution (SED) modeling software, CIGALEMC. Concentrating on the star forming activity and dust contents, we derive parameters such as the specific star formation rate, the dust luminosity, dust mass and temperature.
Amblard, A., Riguccini, L., Temi, P., Im, S., Fanelli, M., Serra, P.   +5 more
openaire   +2 more sources