Results 91 to 100 of about 84,708 (345)

Enabling the study of gene function in gymnosperms: Virus‐induced gene silencing in Ephedra tweedieana

Applications in Plant Sciences, EarlyView.
Abstract Premise As the sister clade to angiosperms, extant gymnosperms are crucial for reconstructing ancestral gene regulatory networks in seed plants. This highlights the need for model systems representing each of their distinct lineages. However, tools to quickly and effectively investigate gene function in gymnosperms are still limited due to the
Anthony G. K. Garcia, Jo Trang Bùi, Todd P. Michael, Stefanie M. Ickert‐Bond, Verónica S. Di Stilio   +4 more
wiley   +1 more source

Massive White Dwarfs in the 100 pc Sample: Magnetism, Rotation, Pulsations, and the Merger Fraction

The Astrophysical Journal
We present a detailed model atmosphere analysis of massive white dwarfs with M > 0.9 M _⊙ and T _eff ≥ 11,000 K in the Montreal White Dwarf Database 100 pc sample and the Pan-STARRS footprint.
Gracyn Jewett, Mukremin Kilic, Pierre Bergeron, Adam Moss, Simon Blouin, Warren R. Brown, Alekzander Kosakowski, Silvia Toonen, Marcel A. Agüeros   +8 more
doaj   +1 more source

A study of high proper-motion white dwarfs I. Spectropolarimetry of a cool hydrogen-rich sample

, 2012
We conducted a spectropolarimetic survey of 58 high proper-motion white dwarfs which achieved uncertainties of >2 kG in the Halpha line and >5 kG in the upper Balmer line series.
Adéla Kawka, Aurière, Aznar Cuadrado, Bagnulo, Barstow, Benvenuto, Bergeron, Bergeron, Brinkworth, Burleigh, Carollo, Carrier, Chiba, Costa, Dobbie, Dufour, Eggen, Eggen, Eggen, Fabrika, Farihi, Ferrario, Garcés, García-Berro, Garstang, Giammichele, Gianninas, Girardi, Girven, Gould, Greenstein, Hintzen, Johnson, Jordan, Jordan, Kalirai, Kawka, Kawka, Kawka, Kawka, Kawka, Kawka, Kawka, Kawka, Kawka, Kemic, Kepler, Kilic, Kilic, Kilkenny, Kleinman, Koester, Koester, Kowalski, Lamontagne, Limoges, Luyten, Luyten, Lépine, Lépine, Martin, Maxted, Maxted, McCook, Muslimov, Nordhaus, Oppenheimer, Patat, Pauli, Pokorny, Potter, Putney, Reid, Salim, Salim, Schaller, Schilbach, Schmidt, Schmidt, Schmidt, Serenelli, Silvestri, Skrutskie, Smith, Stéphane Vennes, Subasavage, Subasavage, Tout, Tremblay, Valyavin, van Leeuwen, Vennes, Vennes, Vennes, Vergely, Welsh, Wesemael, Wickramasinghe, Zuckerman, Zuckerman   +99 more
core   +1 more source

White Dwarfs [PDF]

Symposium - International Astronomical Union, 1974
The effects of core crystallization and of convection in the envelope on the cooling of white dwarfs are reviewed. The case of a 0.6 M⊙ white dwarf composed of an oxygen core and a helium envelope is taken as example. Also the amount of hydrogen that a white dwarf can accrete before nuclear burning occurs is estimated and possible evolutionary ...
openaire   +1 more source

Description of the skull, braincase, and dentition of Moschognathus whaitsi (Dinocephalia, Tapinocephalia), and its palaeobiological and behavioral implications

The Anatomical Record, EarlyView.
Abstract A subadult Moschognathus whaitsi from the Eastern Cape Province, South Africa, was scanned using synchrotron radiation X‐ray computed tomography (SRXCT). Its subadult state allowed the cranial bones and teeth to be identified and individually reconstructed in 3D.
Tristen Lafferty, Luke A. Norton, Aliénor Duhamel, Julien Benoit   +3 more
wiley   +1 more source

The neutrino emission due to plasmon decay and neutrino luminosity of white dwarfs

, 2007
One of the effective mechanisms of neutrino energy losses in red giants, presupernovae and in the cores of white dwarfs is the emission of neutrino-antineutrino pairs in the process of plasmon decay. In this paper, we numerically calculate the emissivity
Braaten, E. M. Kantor, M. E. Gusakov
core   +1 more source

Rethinking brachycephaly: Anatomical implications and health considerations in lagomorphs

The Anatomical Record, EarlyView.
Abstract Brachycephaly in domestic rabbits is increasingly perceived by welfare organizations as associated with significant health complications, particularly oral pathologies. Despite this perception, comparative anatomical research into rabbit brachycephaly is limited compared to that of dogs and cats, compelling an in‐depth examination of its ...
Helaina Cressy, Alice Nishigaki, Matthew C. Gage, Renato L. Previdelli   +3 more
wiley   +1 more source

White Dwarf Merger Remnants: The DAQ Subclass

The Astrophysical Journal
Four years after the discovery of a unique DAQ white dwarf with a hydrogen-dominated and carbon-rich atmosphere, we report the discovery of four new DAQ white dwarfs, including two that were not recognized properly in the literature.
Mukremin Kilic, Pierre Bergeron, Simon Blouin, Gracyn Jewett, Warren R. Brown, Adam Moss   +5 more
doaj   +1 more source

Dynamical instability of white dwarfs and breaking of spherical symmetry under the presence of extreme magnetic fields

, 2014
Massive, highly magnetized white dwarfs with fields up to $10^9$ G have been observed and theoretically used for the description of a variety of astrophysical phenomena.
Coelho, J. G., Cáceres, D. L., Malheiro, M., Marinho, R. M., Negreiros, R., Rueda, J. A., Ruffini, R.   +6 more
core   +1 more source

The formation of single neutron stars from double white-dwarf mergers via accretion-induced collapse [PDF]

, 2020
Dongdong Liu, Bo Wang
openalex   +1 more source