Results 31 to 40 of about 17,877 (291)

The Power of Asteroseismology for Early Stellar Evolution

Frontiers in Astronomy and Space Sciences, 2019
Stars are the building blocks of planetary systems, clusters, associations, and galaxies. The evolution of stars is driven by physical processes in their interiors making theory of stellar interior structure and evolution an important ingredient of ...
Konstanze Zwintz
doaj   +1 more source

Approximate input physics for stellar modelling [PDF]

, 1995
We present a simple and efficient, yet reasonably accurate, equation of state, which at the moderately low temperatures and high densities found in the interiors of stars less massive than the Sun is substantially more accurate than its predecessor by ...
Eggleton, P. P., Han, Z., Pols, O. R., Tout, C. A.   +3 more
core   +2 more sources

Unveiling the Structure and Dynamics of Red Giants With Asteroseismology

Frontiers in Astronomy and Space Sciences, 2020
The Kepler mission observed many thousands of red giants. The long time series, some as long as the mission itself, have allowed us to study red giants with unprecedented detail. Given that red giants are intrinsically luminous, and hence can be observed
Sarbani Basu, Saskia Hekker, Saskia Hekker   +2 more
doaj   +1 more source

Probing the Interiors of Very Hot Jupiters Using Transit Light Curves [PDF]

, 2009
Accurately understanding the interior structure of extra-solar planets is critical for inferring their formation and evolution. The internal density distribution of a planet has a direct effect on the star-planet orbit through the gravitational ...
Aaron S. Wolf, Adams, Agol, Alonso, Arras, Bakos, Barker, Barnes, Barnes, Batten, Bean, Beatty, Bodenheimer, Borucki, Burrows, Burrows, Charbonneau, Charbonneau, Charbonneau, Chatterjee, Christiansen, Claret, Cowling, Darin Ragozzine, Dobbs-Dixon, Dodson-Robinson, Eggleton, Fabrycky, Fabrycky, Fabrycky, Fabrycky, Fabrycky, Ford, Gillon, Goodman, Hebb, Helled, Holman, Hut, Jackson, Johns-Krull, Jordán, Joshi, Kallrath, Kjeldsen, Knutson, Kopal, Kopal, Laughlin, Lee, Levrard, Loeb, López-Morales, Mandel, Mardling, Matsumura, Miralda Escudé, Murray, Nesvorný, O'Donovan, Pál, Rafikov, Rodriguez, Rowe, Russell, Sasselov, Scharf, Seager, Soffel, Sozzetti, Sterne, Sterne, Thommes, Torres, Winn, Winn, Winn, Winn, Winn, Winn, Winn, Wu, Zharkov   +82 more
core   +2 more sources

Models of red giants in the CoRoT asteroseismology fields combining asteroseismic and spectroscopic constraints [PDF]

, 2015
Context. The availability of asteroseismic constraints for a large sample of red giant stars from the CoRoT and Kepler missions paves the way for various statistical studies of the seismic properties of stellar populations. Aims.
Baglin, A., Barban, C., Carrier, F., Eggenberger, P., Elsworth, Y., Girardi, L., Hareter, M., Hekker, S., Kallinger, T., Lagarde, N., Mantegazza, L., Michel, E., Miglio, A., Montalbán, J., Morel, T., Mosser, B., Poretti, E., Rainer, M., Rodrigues, T. S., Valentini, M.   +19 more
core   +5 more sources

WIYN Open Cluster Study 89. M48 (NGC 2548) 2: Lithium Abundances in the 420 Myr Open Cluster M48 from Giants through K Dwarfs

The Astrophysical Journal, 2023
We consider WIYN/Hydra spectra of 329 photometric candidate members of the 420 Myr old open cluster M48 and report lithium detections or upper limits for 234 members and likely members.
Qinghui Sun, Constantine P. Deliyannis, Aaron Steinhauer, Barbara J. Anthony-Twarog, Bruce A. Twarog   +4 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Stellar hydrodynamics caught in the act: Asteroseismology with CoRoT and Kepler

, 2011
Asteroseismic investigations, particularly based on data on stellar oscillations from the CoRoT and Kepler space missions, are providing unique possibilities for investigating the properties of stellar interiors.
Auvergne, Baglin, Baglin, Baudin, Bazot, Bedding, Blažko, Borucki, Bouchy, Bouchy, Carrier, Catala, Chadid, Charpinet, Christensen-Dalsgaard, Degroote, Deheuvels, Dominik, Dupret, Dziembowski, Fontaine, Frandsen, Gough, Gough, Grundahl, Grundahl, Handler, Hekker, Hekker, Houdek, Huber, Jørgen Christensen-Dalsgaard, Kallinger, Kallinger, Kjeldsen, Kjeldsen, Kolenberg, Kolenberg, Kuschnig, Lamb, Maeder, Mathis, Mathis, Michael J. Thompson, Miesch, Miglio, Miglio, Montalbán, Moskalik, Mosser, Mosser, Palacios, Palacios, Pamyatnykh, Poretti, Smith, Soszyński, Trampedach, Van Grootel   +58 more
core   +1 more source

The extent of mixing in stellar interiors: the open clusters Collinder 261 and Melotte 66 [PDF]

, 2016
Context: Determining carbon and nitrogen abundances in red giants provides useful diagnostics to test mixing processes in stellar atmospheres. Aims: Our main aim is to determine carbon-to-nitrogen and carbon isotope ratios for evolved giants in the open ...
Bragaglia, Angela, Drazdauskas, Arnas, Janulis, Rimvydas, Mikolaitis, Šarūnas, Randich, Sofia, Tautvaišienė, Gražina   +5 more
core   +2 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source