Results 31 to 40 of about 2,649,849 (212)

The HARPS search for southern extra-solar planets [PDF]

Astronomy & Astrophysics, 2015
Context. Planetary companions of a fixed mass induce larger amplitude reflex motions around lower-mass stars, which helps make M dwarfs excellent targets for extra-solar planet searches. State of the art velocimeters with $\sim$1m/s stability can detect very low-mass planets out to the habitable zone of these stars.
Astudillo-Defru, N., Bonfils, X., Delfosse, X., Segransan, D., Forveille, T., Bouchy, F., Gillon, M., Lovis, C., Mayor, M., Neves, V., Pepe, F., Perrier, C., Queloz, D., Rojo, P., Santos, N.C., Udry, S.   +15 more
openaire   +10 more sources

Astrophysical uncertainties on stellar microlensing constraints on multisolar mass primordial black hole dark matter [PDF]

Physical Review D, 2017
There has recently been interest in multi-Solar mass Primordial Black Holes (PBHs) as a dark matter (DM) candidate. There are various microlensing, dynamical and accretion constraints on the abundance of PBHs in this mass range. Taken at face value these constraints exclude multi-Solar mass PBHs making up all of the DM for both delta-function and ...
openaire   +4 more sources

The Role of Mixing in Astrophysics [PDF]

Astrophys.J.Suppl. 127 (2000) 213-218, 1999
The role of hydrodynamic mixing in astrophysics is reviewed, emphasizing connections with laser physics experiments and inertial confinement fusion (ICF). Computer technology now allows two dimensional (2D) simulations, with complex microphysics, of stellar hydrodynamics and evolutionary sequences, and holds the promise for 3D.
arxiv   +1 more source

The Effect of Magnetic Variability on Stellar Angular Momentum Loss II: The Sun, 61 Cygni A, $\epsilon$ Eridani, $\xi$ Bootis A and $\tau$ Bootis A [PDF]

, 2019
The magnetic fields of low-mass stars are observed to be variable on decadal timescales, ranging in behaviour from cyclic to stochastic. The changing strength and geometry of the magnetic field should modify the efficiency of angular momentum loss by ...
Finley, Adam J., Matt, Sean P., See, Victor   +2 more
core   +2 more sources

Tidal Limit of Stellar Systems in Two-Power Density Models [PDF]

Astrophysics and Space Science, 364:159 (2019), 2018
As the generalization of gravitational effects on the point mass systems, we want to study the tidal effect exerted on an extended stellar system using spherical and axisymmetric elliptical models. Considering the Isochrone and Plummer models for a passing extended stellar system, the tidal distance and the equipotential surface are calculated.
arxiv   +1 more source

Gaia Data Release 3

Astronomy & Astrophysics, 2023
Context.Gaia Data Release 3 (DR3) provides a wealth of new data products for the astronomical community to exploit, including astrophysical parameters for half a billion stars. In this work, we demonstrate the high quality of these data products and illustrate their use in different astrophysical contexts. Aims.
Vallenari, A., Brown, A., Prusti, T., de Bruijne, J., Arenou, F., Babusiaux, C., Biermann, M., Creevey, O., Ducourant, C., Evans, D., Eyer, L., Guerra, R., Hutton, A., Jordi, C., Klioner, S., Lammers, U., Lindegren, L., Luri, X., Mignard, F., Panem, C., Pourbaix, D., Randich, S., Sartoretti, P., Soubiran, C., Tanga, P., Walton, N., Bailer-Jones, C., Bastian, U., Drimmel, R., Jansen, F., Katz, D., Lattanzi, M., van Leeuwen, F., Bakker, J., Cacciari, C., Castañeda, J., de Angeli, F., Fabricius, C., Fouesneau, M., Frémat, Y., Galluccio, L., Guerrier, A., Heiter, U., Masana, E., Messineo, R., Mowlavi, N., Nicolas, C., Nienartowicz, K., Pailler, F., Panuzzo, P., Riclet, F., Roux, W., Seabroke, G., Sordo, R., Thévenin, F., Gracia-Abril, G., Portell, J., Teyssier, D., Altmann, M., Andrae, R., Audard, M., Bellas-Velidis, I., Benson, K., Berthier, J., Blomme, R., Burgess, P., Busonero, D., Busso, G., Cánovas, H., Carry, B., Cellino, A., Cheek, N., Clementini, G., Damerdji, Y., Davidson, M., de Teodoro, P., Nuñez Campos, M., Delchambre, L., Dell’oro, A., Esquej, P., Fernández-Hernández, J., Fraile, E., Garabato, D., García-Lario, P., Gosset, E., Haigron, R., Halbwachs, J.-L., Hambly, N., Harrison, D., Hernández, J., Hestroffer, D., Hodgkin, S., Holl, B., Janßen, K., Jevardat de Fombelle, G., Jordan, S., Krone-Martins, A., Lanzafame, A., Löffler, W., Marchal, O., Marrese, P., Moitinho, A., Muinonen, K., Osborne, P., Pancino, E., Pauwels, T., Recio-Blanco, A., Reylé, C., Riello, M., Rimoldini, L., Roegiers, T., Rybizki, J., Sarro, L., Siopis, C., Smith, M., Sozzetti, A., Utrilla, E., van Leeuwen, M., Abbas, U., Ábrahám, P., Abreu Aramburu, A., Aerts, C., Aguado, J., Ajaj, M., Aldea-Montero, F., Altavilla, G., Álvarez, M., Alves, J., Anders, F., Anderson, R., Anglada Varela, E., Antoja, T., Baines, D., Baker, S., Balaguer-Núñez, L., Balbinot, E., Balog, Z., Barache, C., Barbato, D., Barros, M., Barstow, M., Bartolomé, S., Bassilana, J.-L., Bauchet, N., Becciani, U., Bellazzini, M., Berihuete, A., Bernet, M., Bertone, S., Bianchi, L., Binnenfeld, A., Blanco-Cuaresma, S., Blazere, A., Boch, T., Bombrun, A., Bossini, D., Bouquillon, S., Bragaglia, A., Bramante, L., Breedt, E., Bressan, A., Brouillet, N., Brugaletta, E., Bucciarelli, B., Burlacu, A., Butkevich, A., Buzzi, R., Caffau, E., Cancelliere, R., Cantat-Gaudin, T., Carballo, R., Carlucci, T., Carnerero, M., Carrasco, J., Casamiquela, L., Castellani, M., Castro-Ginard, A., Chaoul, L., Charlot, P., Chemin, L., Chiaramida, V., Chiavassa, Andrea, Chornay, N., Comoretto, G., Contursi, G., Cooper, W., Cornez, T., Cowell, S., Crifo, F., Cropper, M., Crosta, M., Crowley, C., Dafonte, C., Dapergolas, A., David, M., David, P., de Laverny, P., de Luise, F., de March, R., de Ridder, J.   +199 more
openaire   +8 more sources

The s-process nucleosynthesis in massive stars: current status and uncertainties due to convective overshooting [PDF]

, 2012
Context: It is well known that the so-called s-process is responsible for the production of neutron-rich trans-iron elements, that form the bulk of the "heavy nuclides" (i.e.
Pumo, M. L.
core   +3 more sources

Recent Advances in Modeling Stellar Interiors

, 2010
Advances in stellar interior modeling are being driven by new data from large-scale surveys and high-precision photometric and spectroscopic observations.
A. Baglin, A. Dotter, A. Dotter, A. Formicola, A. Grigahcéne, A. Miglio, A. Noels, A. Pigulski, A. Thoul, A.N. Cox, A.S. Brun, A.S. Brun, A.S. Brun, A.Y. Potekhin, C. Angulo, C. Paquette, C. Paquette, C.A. Iglesias, C.A. Meakin, C.W. Straka, D. Arnett, D. Arnett, D. Mao, D. Mihalas, D.B. Alexander, D.D. Clayton, D.S.P. Dearborn, E.E. Salpeter, E.G. Adelberger, F.J. Rogers, G.R. Caughlan, H. Hu, H. Hu, H.A. Kassim, I. Iben Jr., I. Soszyński, J. Christensen-Dalsgaard, J. Christensen-Dalsgaard, J. Daszyńska-Daszkiewicz, J. Daszyńska-Daszkiewicz, J. Ferguson, J.A. Guzik, J.A. Guzik, J.A. Guzik, J.M. Burgers, J.M. Matthews, Joyce Ann Guzik, K. Mussack, K. Ogata, L.H. Li, L.H. Li, M. Asplund, M. Asplund, M. Mocák, M. Mocák, M.J. Seaton, N. Gai, N. Grevesse, N. Itoh, N. Itoh, N. Itoh, N. Magee, N. Smith, N.J. Shaviv, N.R. Badnell, P. Kippenhahn, P. Lenz, P. Ventura, P.P. Eggleton, R. Gilliland, R.F. González, R.G. Deupree, R.G. Deupree, R.G. Deupree, R.G. Deupree, R.G. Deupree, R.G. Deupree, R.G. Deupree, Rodrǵuez-López, S. Basu, S. Cassisi, S. Cassisi, S. Randall, S. Theado, S. Turcotte, S. Turcotte, T. Zdravkov, T. Zdravkov, T. Zdravkov, W. Dappen, W.B. Hubbard   +90 more
core   +1 more source

Nuclear Astrophysics [PDF]

, 1998
Nuclear astrophysics is that branch of astrophysics which helps understanding some of the many facets of the Universe through the knowledge of the microcosm of the atomic nucleus.
Arnould, M., Takahashi, K.
core   +3 more sources

Stellar masers, circumstellar envelopes, and supernova remnants [PDF]

, 2007
This paper reviews recent advances in the study or circumstellar masers and masers found toward supernova remnants. The review is organized by science focus area, including the astrophysics of extended stellar atmospheres, stellar mass-loss processes and outflows, late-type evolved stellar evolution, stellar maser excitation and chemistry, and the use ...
arxiv   +1 more source