Results 1 to 10 of about 114,632 (282)

Disk-locking Regulates Stellar Rotation in Young Clusters: Insights from NGC 2264

The Astrophysical Journal
Many young clusters possess extended main sequences, a phenomenon commonly ascribed to stellar rotation. However, the mechanism behind their very wide stellar rotation distributions remains unclear.
Yutian Bu, Chenyu He, Min Fang, Chengyuan Li   +3 more
doaj   +2 more sources

Dependence of Stellar Differential Rotation on Effective Temperature and Rotation: An Analysis from Starspot Transit Mapping

The Astrophysical Journal, 2023
Stellar rotation is crucial for studying stellar evolution, since it provides information about age, angular momentum transfer, and magnetic fields of stars.
Alexandre Araújo, Adriana Valio
doaj   +1 more source

BCD Spectrophotometry and Rotation of Active B-Type Stars: Theory and Observations

Galaxies, 2023
This review has two parts. The first one is devoted to the Barbier–Chalonge–Divan (BCD) spectrophotometric system, also known as the Paris spectral classification system.
Juan Zorec
doaj   +1 more source

The Stellar Activity - Rotation Relationship [PDF]

, 2012
Using a new catalog of 824 solar and late-type stars with X-ray luminosities and rotation periods we have studied the relationship between rotation and stellar activity. From an unbiased subset of this sample the power law slope of the unsaturated regime,
Drake, Jeremy J., Henry, Gregory W., Mamajek, Eric E., Wright, Nicholas J.   +3 more
core   +4 more sources

CALIFA reveals Prolate Rotation in Massive Early-type Galaxies: A Polar Galaxy Merger Origin? [PDF]

, 2017
We present new evidence for eight early-type galaxies (ETGs) from the CALIFA Survey that show clear rotation around their major photometric axis ("prolate rotation").
Aguerri, J. Alfonso L., Chang, Jiang, Falcón-Barroso, Jesús, Lyubenova, Mariya, Macciò, Andrea V., Tsatsi, Athanasia, van de Ven, Glenn   +6 more
core   +3 more sources

Effects of thermohaline instability and rotation-induced mixing on the evolution of light elements in the Galaxy : D, 3He and 4He [PDF]

, 2012
Recent studies of low- and intermediate-mass stars show that the evolution of the chemical elements in these stars is very different from that proposed by standard stellar models.
Asplund, Balser, Balser, Balser, Bania, Bennett, Boothroyd, Burles, C. Charbonnel, C. Chiappini, Charbonnel, Charbonnel, Charbonnel, Charbonnel, Charbonnel, Chiappini, Chiappini, Chiappini, Coc, Costa, Cyburt, D. Romano, Dearborn, Denissenkov, Denissenkov, Edmunds, Eggleton, Eggleton, Ekström, Epstein, F. Matteucci, Frogel, Galli, Galli, Geiss, Geiss, Geiss, Gloeckler, Grevesse, Groenewegen, Hirschi, Hirschi, Hogan, Hébrard, Hébrard, Iben, Iwamoto, Jenkins, Kobayashi, Krishnamurti, Lagarde, Larson, Linsky, M. Tosi, Maeder, Marigo, Matteucci, Meynet, N. Lagarde, Oliveira, Palla, Peebles, Pettini, Prantzos, Prodanović, Prodanović, Reeves, Rogers, Romano, Romano, Romano, Rood, Rood, Rood, Rosenblum, Serenelli, Songaila, Sonneborn, Spergel, Steigman, Steigman, Tosi, Traxler, Truran, Ulrich, Vidal-Madjar, Wagoner, Weiss, Zahn   +88 more
core   +2 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

The Rotation Period of the Planet-Hosting Star HD 189733 [PDF]

, 2007
We present synoptic optical photometry of HD 189733, the chromospherically active parent star of one of the most intensively studied exoplanets. We have significantly extended the timespan of our previously reported observations and refined the estimate ...
Chatterjee S., Eaton J. A., Fabrycky D. & Tremaine S., Fabrycky D. C., Gregory W. Henry, Joshua N. Winn, Pont F., Tinetti G.   +7 more
core   +3 more sources

Disk accretion onto a magnetized star

EPJ Web of Conferences, 2014
The problem of interaction of the rotating magnetic field, frozen to a star, with a thin well conducting accretion disk is solved exactly. It is shown that a disk pushes the magnetic field lines towards a star, compressing the stellar dipole magnetic ...
Istomin Ya. N., Haensel P.
doaj   +1 more source

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