Results 31 to 40 of about 35,527 (304)

Wind-accretion disks in wide binaries, second generation protoplanetary disks and accretion onto white dwarfs

, 2012
Mass transfer from an evolved donor star to its binary companion is a standard feature of stellar evolution in binaries. In wide binaries, the companion star captures some of the mass ejected in a wind by the primary star.
Alexander, Andrews, Arnett, Bath, Bath, Bath, Bildsten, Bromley, Busso, Cannizzo, Chambers, Chiang, D'Alessio, de Val-Borro, Duquennoy, Hagai B. Perets, Han, Ireland, Kenyon, Livio, Lynden-Bell, Mastrodemos, Mikolajewska, Noebauer, Perets, Scott J. Kenyon, Shen, Soker, Sokoloski, Waldman, Wang   +30 more
core   +1 more source

Interaction of young stellar object jets with their accretion disk [PDF]

Astronomy & Astrophysics, 2005
I reexamine recent observations of velocity profiles across jets blown by young stellar objects, and argue that the observations do not support the interpretation of jets rotating around their symmetry axes. Instead, I propose that the interaction of the jets with a twisted-tilted (wrapped) accretion disk can form the observed asymmetry in the jets ...
openaire   +2 more sources

Ionization and heating by X-rays and cosmic rays*

EPJ Web of Conferences, 2015
High-energy radiation from the central T Tauri and protostars plays an important role in shaping protoplanetary disks and influences their evolution. Such radiation, in particular X-rays and extreme-ultraviolet (EUV) radiation, is predominantly generated
Güdel Manuel
doaj   +1 more source

Spitzer observations of the Orion OB1 association: disk census in the low mass stars

, 2007
We present new Spitzer Space Telescope observations of two fields in the Orion OB1 association. We report here IRAC/MIPS observations for 115 confirmed members and 41 photometric candidates of the ~10 Myr 25 Orionis aggregate in the OB1a subassociation ...
A. K. Vivas, Baraffe I., C. Briceno, D'Alessio P., J. Downes, J. Muzerolle, Jesus Hernandez, L. Allen, L. Hartmann, Nuria Calvet, R. Gutermuth, Schuster M. T., Siess L.   +12 more
core   +1 more source

Numerical simulations on the relative importance of starbursts and AGN in ultra-luminous infrared galaxies [PDF]

, 2005
We investigate the relative importance of starbursts and AGN in nuclear activities of ultra-luminous infrared galaxies (ULIRGs) based on chemodynamical simulations combined with spectrophotometric synthesis codes.
Armus, Bahcall, Baldwin, Barger, Barnes, Barnes, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Binney, Binney, Blain, Blake, Bondi, Borne, Borne, Bushouse, Canalizo, Canalizo, Cid Fernandes, Clements, Colina, Colina, Cui, Di Matteo, Disney, Dopita, Faber, Farrah, Floyd, Frank, Gao, Genzel, Gerritsen, Goto, Goto, Hausman, Hennawi, Hernquist, Hopkins, Hoyle, Huo, Hutchings, Imanishi, Iwasawa, Jones, Jonsson, Kauffmann, Kauffmann, Kenji Bekki, Kennicutt, Kennicutt, Kewley, Kraemer, Larson, Liu, Lutz, Magorrian, Matthew Whiting, Mihos, Mihos, Mortlock, Mouri, Murphy, Navarro, Noguchi, Olson, Poggianti, Ponman, Pracy, Rees, Ruffert, Sanders, Sanders, Sanders, Schmidt, Schwarz, Scoville, Shapiro, Shioya, Shioya, Shioya, Shioya, Shioya, Shlosman, Smail, Smail, Smail, Soifer, Solomon, Springel, Springel, Stockton, Sugimoto, Surace, Tacconi, Taniguchi, Thornton, Trentham, Van Den Bergh, Veilleux, Veilleux, Veilleux, Weil, Wielen, Xia, Yasuhiro Shioya, Zheng   +116 more
core   +3 more sources

On rapid migration and accretion within disks around supermassive black holes

, 2011
Galactic nuclei should contain a cluster of stars and compact objects in the vicinity of the central supermassive black hole due to stellar evolution, minor mergers and gravitational dynamical friction.
Alexander, Armitage, Artymowicz, B. McKernan, Baruteau, Chang, Collin, Cordes, Crummy, Gierliński, Goodman, H. B. Perets, Ho, K. E. S. Ford, Kauffmann, Kormendy, Krolik, L. M. Winter, Levin, Lodato, Lyra, Masset, McKernan, McKernan, McKernan, Merritt, Miralda Escudé, Miralda Escudé, Morris, Nayakshin, Nelson, Noble, Ostriker, Paardekooper, Pepliński, Pepliński, Perets, Pier, Rauch, Remillard, Schödel, Shakura, Shlosman, Sirko, Subr, Syer, T. Yaqoob, Toropina, Vilkoviskij, W. Lyra, Winter   +50 more
core   +1 more source

Inconsistency in the standard model for stellar thin accretion disks [PDF]

Physical Review D, 2012
We analyze the configuration of a thin rotating accretion disk, which is embedded in a magnetic field inducing a backreaction in the gravitating plasma. The aim of this study is to determine the conditions under which the gaseous accretion model of Shakura can be reconciled with the magnetohydrodynamical picture requested to trigger the underlying ...
Giovanni Montani, Nakia Carlevaro
openaire   +1 more source

The chemical evolution of local star forming galaxies: Radial profiles of ISM metallicity, gas mass, and stellar mass and constraints on galactic accretion and winds

, 2015
The radially averaged metallicity distribution of the ISM and the young stellar population of a sample of 20 disk galaxies is investigated by means of an analytical chemical evolution model which assumes constant ratios of galactic wind mass loss and ...
Bresolin, Fabio, Burkert, Andreas, Dima, Gabriel I., Ho, I-Ting, Kudritzki, Rolf-Peter, Schruba, Andreas, Zahid, H. Jabran   +6 more
core   +1 more source

On the Origin of the Galaxy Star-Formation-Rate Sequence: Evolution and Scatter [PDF]

, 2010
We use a semi-analytic model for disk galaxies to explore the origin of the time evolution and small scatter of the galaxy SFR sequence -- the tight correlation between star-formation rate (SFR) and stellar mass (M_star).
Aaron A. Dutton, Agertz, Avila Reese, Avishai Dekel, Bell, Bigiel, Birnboim, Birnboim, Blitz, Blitz, Bothwell, Bouwens, Bruzual, Bullock, Bullock, Cattaneo, Chabrier, Cole, Cole, Courteau, Croton, Daddi, Daddi, Daddi, Daddi, Davé, Dekel, Dekel, Dekel, Dekel, Dunkley, Dutton, Dutton, Elbaz, Elmegreen, Elmegreen, Elmegreen, Erb, Firmani, Frank C. Van Den Bosch, Franx, Gao, Garnett, Gonzalez, Hatton, Hopkins, Kauffmann, Kauffmann, Kennicutt, Keres, Krumholz, Lilly, Lotz, Macciò, Macciò, Madau, Maller, Martin, Melbourne, Mo, Murray, Navarro, Navarro, Neistein, Noeske, Noeske, Pannella, Prochaska, Pérez-González, Salim, Schiminovich, Schiminovich, Schmidt, Sharma, Shen, Sobral, Somerville, Somerville, Stark, Sutherland, Tacconi, Tacconi, Tacconi, Van Den, Van Den, Van Den Bosch, Villar, Wechsler, Williams, Wolf, Wong, Wu, Zhao   +92 more
core   +1 more source

THE DESTRUCTION OF THIN STELLAR DISKS VIA COSMOLOGICALLY COMMON SATELLITE ACCRETION EVENTS [PDF]

The Astrophysical Journal, 2009
6 pages, 4 figures; accepted by ApJL; high-resolution version and example movie of simulation available at http://web.me.com/purcellgalaxies/workshop/log/Entries/2008/10/15_The_Destruction_of_thin_stellar_disks_via_cosmologically_common_mergers ...
Purcell, Chris W., Kazantzidis, Stelios, Bullock, James S.   +2 more
openaire   +2 more sources