Results 41 to 50 of about 1,140,165 (333)

Cluster kinematics and stellar rotation in NGC 419 with MUSE and adaptive optics [PDF]

Monthly notices of the Royal Astronomical Society, 2018
We present adaptive optics (AO)-assisted integral-field spectroscopy of the intermediate-age star cluster NGC 419 in the Small Magellanic Cloud. By investigating the cluster dynamics and the rotation properties of main-sequence turn-off (MSTO) stars, we ...
S. Kamann, N. Bastian, T. Husser, S. Martocchia, C. Usher, M. D. Brok, S. Dreizler, A. Kelz, D. Krajnovi'c, J. Richard, M. Steinmetz, P. Weilbacher   +11 more
semanticscholar   +1 more source

Extended main sequence turnoffs in open clusters as seen by Gaia – I. NGC 2818 and the role of stellar rotation [PDF]

Monthly notices of the Royal Astronomical Society, 2018
We present an analysis of the relatively low mass ($\sim2400$~M$_{\odot}$), $\sim800$~Myr, Galactic open cluster, NGC~2818, using Gaia DR2 results combined with VLT/FLAMES spectroscopy.
N. Bastian, S. Kamann, I. Cabrera-Ziri, C. Georgy, S. Ekström, C. Charbonnel, C. Charbonnel, M. D. Ovelar, C. Usher   +8 more
semanticscholar   +1 more source

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

Implications of the generation of internal gravity waves by penetrative convection for the internal rotation evolution of low-mass stars

EPJ Web of Conferences, 2017
Due to the space-borne missions CoRoT and Kepler, noteworthy breakthroughs have been made in our understanding of stellar evolution, and in particular about the angular momentum redistribution in stellar interiors. Indeed, the high-precision seismic data
Pinçon Charly, Belkacem Kévin, Goupil Marie-Jo   +2 more
doaj   +1 more source

Meta-analysis of Photometric and Asteroseismic Measurements of Stellar Rotation Periods: The Lomb–Scargle Periodogram, Autocorrelation Function, and Wavelet and Rotational Splitting Analysis for 92 Kepler Asteroseismic Targets

The Astrophysical Journal, 2022
We perform intensity variability analyses (photometric analyses: the Lomb–Scargle periodogram, autocorrelation, and wavelet) and asteroseismic analysis of 92 Kepler solar-like main-sequence stars to understand the reliability of the measured stellar ...
Yuting Lu, Othman Benomar, Shoya Kamiaka, Yasushi Suto   +3 more
doaj   +1 more source

Learning about the latitudinal distribution of starspots through the periodogram analysis of photometric data

EPJ Web of Conferences, 2017
Starspots are cooler and darker than the stellar surface. Therefore, the emitted flux of a star changes when spots are visible on its surface. The presence of spots together with the stellar rotation leads to a periodic modulation on the light curve.
Santos Ângela R. G., Cunha Margarida S., Avelino Pedro P., García Rafael A., Mathur Savita   +4 more
doaj   +1 more source

C9orf72 ALS‐causing mutations lead to mislocalization and aggregation of nucleoporin Nup107 into stress granules

FEBS Letters, EarlyView.
Mutations in the C9orf72 gene represent the most common genetic cause of amyotrophic lateral sclerosis (ALS), a fatal neurodegenerative disease. Using patient‐derived neurons and C. elegans models, we find that the nucleoporin Nup107 is dysregulated in C9orf72‐associated ALS. Conversely, reducing Nup107 levels mitigates disease‐related changes.
Saygın Bilican, Yara Nabawi, William Hongyu Zhang, Dunja Petrovic, Markus Wehrmann, Sara Muñoz‐García, Seda Koyuncu, David Vilchez   +7 more
wiley   +1 more source

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   +1 more source

Asteroseismology and Spectropolarimetry of the Exoplanet Host Star λ Serpentis

The Astronomical Journal, 2023
The bright star λ Ser hosts a hot Neptune with a minimum mass of 13.6 M _⊕ and a 15.5 day orbit. It also appears to be a solar analog, with a mean rotation period of 25.8 days and surface differential rotation very similar to the Sun.
Travis S. Metcalfe, Derek Buzasi, Daniel Huber, Marc H. Pinsonneault, Jennifer L. van Saders, Thomas R. Ayres, Sarbani Basu, Jeremy J. Drake, Ricky Egeland, Oleg Kochukhov, Pascal Petit, Steven H. Saar, Victor See, Keivan G. Stassun, Yaguang Li, Timothy R. Bedding, Sylvain N. Breton, Adam J. Finley, Rafael A. García, Hans Kjeldsen, Martin B. Nielsen, J. M. Joel Ong, Jakob L. Rørsted, Amalie Stokholm, Mark L. Winther, Catherine A. Clark, Diego Godoy-Rivera, Ilya V. Ilyin, Klaus G. Strassmeier, Sandra V. Jeffers, Stephen C. Marsden, Aline A. Vidotto, Sallie Baliunas, Willie Soon   +33 more
doaj   +1 more source

Linked dimers of the AAA+ ATPase Msp1 reveal energetic demands and mechanistic plasticity for substrate extraction from lipid bilayers

FEBS Letters, EarlyView.
Cells must clear mislocalized or faulty proteins from membranes to survive. The AAA+ ATPase Msp1 performs this task, but dissecting how its six subunits work together is challenging. We engineered linked dimers with varied numbers of functional subunits to reveal how Msp1 subunits cooperate and use energy to extract proteins from the lipid bilayer ...
Deepika Gaur, Brian Acquaviva, Baylee A. Smith, Nathan Walker, Isabella Walter, Matthew L. Wohlever   +5 more
wiley   +1 more source