Results 31 to 40 of about 4,822,469 (343)

A spectroscopic survey of Herbig Ae/Be stars with X-shooter - I. Stellar parameters and accretion rates [PDF]

, 2015
JRF gratefully acknowledges a studentship from the Science and Technology Facilities Council of the UK. JDI gratefully acknowledges funding from the European Union FP7-2011 under grant agreement no.
van den Ancker, M. E., Fairlamb, JR, Oudmaijer, R. D., Van den Ancker, ME, Ilee, JD, Mendigutía, I., Ilee, John David, Fairlamb, J. R., Oudmaijer, RD, Mendigutia, I   +9 more
core   +1 more source

All-sky Faint DA White Dwarf Spectrophotometric Standards for Astrophysical Observatories: The Complete Sample

The Astrophysical Journal, 2023
Hot DA white dwarfs (DAWDs) have fully radiative pure hydrogen atmospheres that are the least complicated to model. Pulsationally stable, they are fully characterized by their effective temperature T _eff and surface gravity $\mathrm{log}\,g$ , which can
Tim Axelrod, Abhijit Saha, Thomas Matheson, Edward W. Olszewski, Ralph C. Bohlin, Annalisa Calamida, Jenna Claver, Susana Deustua, Jay B. Holberg, Ivan Hubeny, John W. Mackenty, Konstantin Malanchev, Gautham Narayan, Sean Points, Armin Rest, Elena Sabbi, Christopher W. Stubbs   +16 more
doaj   +1 more source

Stability and gravitational collapse of neutron stars with realistic equations of state [PDF]

Monthly notices of the Royal Astronomical Society, 2020
We discuss the stability and construct dynamical configurations describing the gravitational collapse of unstable neutron stars with realistic equations of state compatible with the recent LIGO–Virgo constraints.
J. M. Pretel, M. F. A. da Silva
semanticscholar   +1 more source

A BCool magnetic snapshot survey of solar-type stars [PDF]

, 2014
SVJ acknowledges research funding by the Deutsche Forschungsgemeinschaft (DFG) under grant SFB 963/1, project A16. JM was funded by a fellowship of the Alexander von Humboldt Foundation in Göttingen.
Jeffers, S., Ramirez-Velez, J. C., Reiners, Ansgar, Carter, B.D., Donati, J. -F., Jardine, M., do Nascimento, J.-D., Collaboration, The Bcool, Petit, P., Dintrans, B.D., Ramirez-Vèlez, J., Marsden, S., do Nascimento Jr., J., Dintrans, B., Ramirez-Veles, J.C., Donati, J., Carter, Brad D., Auriere, M., Lignieres, F., Nascimento, J. D. Do, Marsden, S. C., Van Grootel, V., Morin, J., do Nascimento, J.-D., Jr., Bouvier, J., Jeffers, Sandra V., Fares, R., Theado, S., Gastine,, Gastine, Thomas, Morin, Julien, Donati, J.-F., Van Grootel, Valérie, BCool Collaboration, do Nascimento Jr., J.-D., Lanoux, J., Morgenthaler, A., Konstantinova-Antova, R., Reiners, A., Jeffers, S.V., Jeffers, S. V., Catala, C., Gastine, T., do Nascimento, J. -D., Carter, B. D., Marsden, S.C., Carter, B., Collaboration, T.   +47 more
core   +1 more source

Pulsation properties of ultra-massive DA white dwarf stars with ONe cores [PDF]

Astronomy & Astrophysics, 2018
Context. Ultra-massive hydrogen-rich white dwarf stars are expected to harbor oxygen/neon cores resulting from the progenitor evolution through the super-asymptotic giant branch phase.
F. D. Ger'onimo, A. H. Córsico, L. Althaus, F. C. Wachlin, M. Camisassa   +4 more
semanticscholar   +1 more source

Rapidly rotating compact stars in Rastall’s gravity [PDF]

Classical and quantum gravity, 2020
In this work we study rapidly rotating stars by considering the Rastall theory of gravity. We obtain and solve the equations by numerical methods for two usual parametrization of polytropic stars.
F. M. da Silva, L. C. N. Santos, C. C. Barros   +2 more
semanticscholar   +1 more source

The Stellar Space Distributions of dA and gK Stars [PDF]

International Astronomical Union Colloquium, 1995
AbstractWe present a case study on the stellar space distribution of stars with MK spectral types B8 to A2 (dA) and gG8 to gK2 (gK) in a sky region of 25 square degrees, centred at the galactic coordinate l = 4° and b = +12°. Two hundred and forty-eight (248) stars with MK type of B8–A2 and gG8–gK2 were identified in this field.
D. N. Dawanas, B. Hidayat
openaire   +1 more source

Asteroseismic Study of KUV03442+0719 with Parallax Constraints

The Astrophysical Journal, 2023
Hydrogen atmosphere white dwarf KUV03442+0719 was first reported as a pulsator by Gianninas et al. in 2006. Follow-up campaigns by Su et al. revealed more periods.
Agnes Bischoff-Kim
doaj   +1 more source

Classifying Single Stars and Spectroscopic Binaries Using Optical Stellar Templates [PDF]

Astrophysical Journal Supplement Series, 2020
Stellar spectral classification is a fundamental tool of modern astronomy, providing insight into physical characteristics such as effective temperature, surface gravity, and metallicity.
B. Roulston, P. Green, Aurora Y. Kesseli
semanticscholar   +1 more source

A PRESENÇA DA FRAGMENTAÇÃO CONSTITUCIONAL NO SENADO GALÁCTICO DA FRANQUIA STAR WARS

Revista de Direito Brasileira, 2022
Na história de Star Wars, em que pese a República Galáctica tenha instituído um ordenamento jurídico universal, há planetas com leis próprias, direitos não-oficiais, em um exemplo claro de pluralismo jurídico. Na contemporaneidade, é possível constatar que, assim como no filme, os atuais modelos de direito não conseguem mais abranger a todos os ...
Leonel Severo Rocha, Pedro Ernesto Neubarth Fernandes, Rosele Joaquim Centeno   +2 more
openaire   +2 more sources