Results 21 to 30 of about 116,076 (286)

Measurement of the Angular Momenta of Pre-main-sequence Stars: Early Evolution of Slow and Fast Rotators and Empirical Constraints on Spin-down Torque Mechanisms

The Astronomical Journal, 2023
We use TESS full-frame imaging data to investigate the angular momentum evolution of young stars in the Orion Complex. We confirm recent findings that stars with rotation periods faster than 2 days are overwhelmingly binaries, with typical separations of
Marina Kounkel, Keivan G. Stassun, Lynne A. Hillenbrand, Jesús Hernández, Javier Serna, Jason Lee Curtis   +5 more
doaj   +1 more source

The beta Pictoris association: Catalog of photometric rotational periods of low-mass members and candidate members [PDF]

, 2016
We intended to compile the most complete catalog of bona fide members and candidate members of the beta Pictoris association, and to measure their rotation periods and basic properties from our own observations, public archives, and exploring the ...
Artemenko, S., Buccino, A., Curtis, I., Hambsch, F. -J., Harlingten, C., Hentunen, V. -P., Jofre', E., Kehusmaa, P., Malo, L., Mauas, P., Medhi, B. J., Messina, S., Millward, M., Monard, B., Naves, R., Petrucci, R., Pi, Q., Santallo, R., Savuskin, A., Serrano, M. Muro, Tan, T. G., Zhang, L.   +21 more
core   +4 more sources

A study of stellar population of intermediate-age globular cluster NGC 2249

Results in Physics, 2020
The Large Magellanic Cloud (LMC) star cluster NGC 2249 has been found to exhibit an extended main-sequence turn-off (eMSTO) in the color-magnitude diagram (CMD) derived from the data of the Hubble Space Telescope (HST).
Zhongmu Li, Rainer Spurzem, Caiyan Mao, Yingxin Ma, Yangyang Deng   +4 more
doaj   +1 more source

3-Dimensional Core-Collapse

, 2003
In this paper, we present the results of 3-dimensional collapse simulations of rotating stars for a range of stellar progenitors. We find that for the fastest spinning stars, rotation does indeed modify the convection above the proto-neutron star, but it
Chris L. Fryer, Janka H.-Th., Michael S. Warren, Muller E., New K. C. B., Schenk A. K.   +5 more
core   +1 more source

Supernovae from rotating stars

, 2017
The present paper discusses the main physical effects produced by stellar rotation on presupernovae, as well as observations which confirm these effects and their consequences for presupernova models.
A Gal-Yam, A Heger, A Heger, A Maeder, A Maeder, A Maeder, A Maeder, A Stacy, AFJ Moffat, AV Filippenko, C Chiappini, C Chiappini, C Georgy, C Martayan, F Martins, G Meynet, G Meynet, G Meynet, G Meynet, G Meynet, G Piotto, H Zeipel Von, I Mandel, J-P Zahn, JH Groh, JH Groh, JH Groh, JJ Eldridge, JS Vink, MC Bersten, MR Drout, N Przybilla, N Smith, N Yusof, O Krause, P Marchant, PA Crowther, R Hirschi, R Hirschi, R Hirschi, RM Humphreys, S Ekström, S Ekström, S-C Yoon, SE Woosley, SE Woosley, SE Woosley, SJ Smartt, SJ Smartt, T Karlsson, T Moriya, T Yoshida, Y Cao   +52 more
core   +1 more source

A study of central galaxy rotation with stellar mass and environment [PDF]

, 2016
© 2017. The American Astronomical Society. All rights reserved. We present a pilot analysis of the influence of galaxy stellar mass and cluster environment on the probability of slow rotation in 22 central galaxies at mean redshift z = 0.07.
Bremer, Malcom N., Brough, Sarah, Colless, Matthew, Couch, Warrick J., Jimmy, Kafle, Prajwal R., Lara-Lopez, Maritza A., Lara-López, Maritza A., Lopez-Sanchez, Angel R., López-Sánchez, Ángel R., Miller, Christopher, Oliva-Altamirano, Paola, Phillipps, Steven, Pimbblet, Kevin, Sharp, Rob, Tran, Kim-Vy   +15 more
core   +6 more sources

Differential rotation of Kepler-71 via transit photometry mapping of faculae and starspots [PDF]

, 2019
Knowledge of dynamo evolution in solar-type stars is limited by the difficulty of using active region monitoring to measure stellar differential rotation, a key probe of stellar dynamo physics.
Carter, B. D., Marsden, S. C., Valio, A., Zaleski, S. M.   +3 more
core   +2 more sources

Observable Signatures of Classical T Tauri Stars Accreting in an Unstable Regime

EPJ Web of Conferences, 2014
We discuss key observational signatures of Classical T Tauri stars (CTTSs) accreting through Rayleigh-Taylor instability, which occurs at the interface between an accretion disk and a stellar magnetosphere.
Kurosawa Ryuichi, Romanova M. M.
doaj   +1 more source

The Effect of Stellar Rotation on Colour-Magnitude Diagrams: On the apparent presence of multiple populations in intermediate age stellar clusters

, 2009
A significant number of intermediate age clusters (1-2 Gyr) in the Magellanic Clouds appear to have multiple stellar populations within them, derived from bi-modal or extended main sequence turn offs. If this is interpreted as an age spread, the multiple
Bekki, Boesgaard, Cardini, Charbonnel, Collins, D'Ercole, D'Souza, De Mink, Donati, Eldridge, Faulkner, Fossati, Gaige, Glatt, Goudfrooij, Gray, Heger, Huang, Huang, Hunter, Mackey, Mackey, Massey, Mestel, Meynet, Milone, N. Bastian, Palacios, Pietrinferni, Piotto, Pérez Hernández, Royer, S. E. de Mink, Salpeter, Schatzman, Talon, Townsend, von Zeipel, Westera, Yoon   +39 more
core   +1 more source

Characterisation of starspot structure and differential rotation of Kepler-411

Astronomy & Astrophysics
Context. Starspots and their movements on stellar surfaces enable the mechanisms of stellar magnetic activity to be investigated. Information on the spot distribution and differential rotation provide important constraints for the behaviour of stellar ...
Tuomi Mikko, Haris András, Hackman Thomas   +2 more
doaj   +1 more source