Results 41 to 50 of about 17,929 (222)

DEATHSTAR—CO Envelope Size and Asymmetry of Nearby AGB Stars

Galaxies, 2022
Low- and intermediate-mass stars evolve into asymptotic giant branch (AGB) stars near the end of their lives, losing mass through slow and massive winds.
Miora Andriantsaralaza, Wouter Vlemmings, Sofia Ramstedt, Elvire De Beck   +3 more
doaj   +1 more source

The Circumstellar Matter Around OH44.8-2.3

, 2000
To appear in ``Asymmetrical Planetary Nebulae II: from Origins to Microstructures,'' ASP Conference Series, Vol. 199, 2000; J.H. Kastner, N. Soker, & S.A.
Bobrowsky, M., Greeley, B. W., Ueta, T., Meixner, M. M.   +3 more
openaire   +2 more sources

The progenitor of SN 2011ja: Clues from circumstellar interaction

, 2013
Massive stars, possibly red supergiants, which retain extended hydrogen envelopes until core collapse, produce Type II Plateau (IIP) supernovae. The ejecta from these explosions shock the circumstellar matter originating from the mass loss of the ...
Chakraborti, Sayan, Chandra, Poonam, Dwarkadas, Vikram V., Pooley, David, Ray, Alak, Roy, Rupak, Ryder, Stuart, Smith, Randall, Sutaria, Firoza, Yadav, Naveen   +9 more
core   +1 more source

Diurnal Variability Modulates Episodic Convection in Hothouse Climates Over Ocean and Swamp‐Like Surface Conditions

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 2, February 2026.
Abstract Hot and moist “hothouse” climates occurred in Earth's past and are expected in Earth's far future climate, driven by increasing solar luminosity. In hothouse climate regimes, precipitation transitions from a quasi‐steady state, as in present‐day tropical convection, to an “episodic deluge” or relaxation‐oscillator (RO) regime where ...
Namrah Habib, Guy Dagan, Nathan Steiger
wiley   +1 more source

The 12CO gas structures of protoplanetary disks in the Upper Scorpius region

Astronomy & Astrophysics
We present measurements of key protoplanetary disk properties inferred from parametric models of ALMA 12CO spectral line visibilities. We derived gas-disk radii, integrated fluxes, optically thick emission layers, and brightness temperature profiles for ...
Zallio Luigi, Rosotti Giovanni P., Vioque Miguel, Miotello Anna, Andrews Sean M., Manara Carlo F., Carpenter John M., Empey Aaron, Kurtovic Nicolás T., Law Charles J., Longarini Cristiano, Paneque-Carreño Teresa, Teague Richard, Villenave Marion, Yen Hsi-Wei, Zagaria Francesco   +15 more
doaj   +1 more source

Circumstellar matter in the binary V Puppis

The Astrophysical Journal, 1976
Results are reported for Copernicus observations of the double-lined binary V Puppis in the wavelength region from 1155 to 1310 A with a resolution of 0.2 A. The sharp-lined UV absorption spectrum is found to provide a line of sight dominated by an apparently 'textbook' H II region in a Stromgren sphere surrounding the stars. Several characteristics of
D. G. York, B. Flannery, J. Bahcall
openaire   +1 more source

The Low Velocity Wind from the Circumstellar Matter Around the B9V Star sigma Herculis

, 2002
We have obtained FUSE spectra of sigma Her, a nearby binary system, with a main sequence primary, that has a Vega-like infrared excess. We observe absorption in the excited fine structure lines C II* at 1037 A, N II* at 1085 A, and N II** at 1086 A that ...
Abgrall H., Beust H., Bruhweiler F. C., C. H. Chen, Cote J., Fajardo-Acosta S. B., Figueras F., Grosbol P. J., M. Jura, Martin C., Vidal-Madjar A.   +10 more
core   +1 more source

Mass accretion to young stars triggered by flaring activity in circumstellar disks [PDF]

, 2011
Young low-mass stars are characterized by ejection of collimated outflows and by circumstellar disks which they interact with through accretion of mass.
Aarnio, Alexiades, Anders, Andrea Mignone, Armitage, Audard, Balbus, Balbus, Balbus, Balsara, Bessolaz, Bisnovatyi-Kogan, Bodo, Borkowski, Bouvier, Brandenburg, Brown, Cowie, Curran, Fabio Reale, Fadeyev, Favata, Feigelson, Fromang, Getman, Giovanni Peres, Giuliani, Gregory, Hartmann, Hawley, Hawley, Hayashi, Herczeg, Hirose, Hujeirat, Hujeirat, Johns-Krull, Kashyap, King, Koenigl, Kulkarni, Mignone, Mohanty, Muzerolle, Natta, Orlando, Orlando, Orlando, Orlando, Orlando, Powell, Reale, Reale, Reale, Reale, Romanova, Romanova, Romanova, Salvatore Orlando, Shakura, Shu, Smith, Spitzer, Tanaka, Telleschi, Wolk, Wolk, Zanni   +67 more
core   +3 more sources

Exploring the Effects of Reduced Gravitational Field Impacts on Convective Heat Transfer: A Comprehensive Review

Heat Transfer, Volume 55, Issue 1, Page 764-774, January 2026.
ABSTRACT This review explores the impact of gravitational instability on convective heat transfer, integrating existing research results and theoretical models. Gravitational instability is vital in promoting or hindering convective actions in different systems, such as atmospheric events, ocean currents, and industrial processes.
Hossam A. Nabwey, Muhammad Ashraf, A. M. Rashad, Ali J. Chamkha   +3 more
wiley   +1 more source

Vertical Structure of Gas and Dust in Four Debris Disks

The Astrophysical Journal
We present high-spectral-resolution M -band spectra from iSHELL on NASA’s Infrared Telescope Facility along the line of sight to the debris disk host star HD 32297. We also present a Gemini Planet Imager H -band polarimetric image of the HD 131488 debris
Kadin Worthen, Christine H. Chen, Sean D. Brittain, Cicero X. Lu, Isabel Rebollido, Aoife Brennan, Luca Matrà, Carl Melis, Timoteo Delgado, Aki Roberge, Johan Mazoyer   +10 more
doaj   +1 more source