Results 131 to 140 of about 1,914,179 (372)

Midlife Steroid‐Binding Globulin Levels and In Vivo Neuroimaging Measures of Tau in Older Men and Women

Annals of Neurology, EarlyView.
Objective In men and women, sex steroid hormones have been associated with increased risk of Alzheimer's disease (AD) dementia. We aimed to investigate the influence of midlife testosterone and sex hormone binding globulin (SHBG) levels on later‐life in vivo markers of β‐amyloid (Aβ) and tau deposition in clinically healthy older men. Methods This time‐
Rachel F. Buckley, Matthew Scott, Emer R. McGrath, Gillian Coughlan, Mabel Seto, Saptaparni Ghosh, Heidi I. L. Jacobs, Claudia L. Satizabal, Emma Thibault, Vasan Ramachandran, Joanne M. Murabito, Reisa A. Sperling, Keith A. Johnson, Ravi Jasuja, Shalender Bhasin, Sudha Seshadri, Alexa S. Beiser   +16 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

MAGNETISM OF WHITE DWARFS (intermediate results of a survey for kilogauss magnetic fields in white dwarfs)

Odessa Astronomical Publications, 2017
We shortly present intermidiate results of a survey for weak magnetic fields among degenerate stars (white dwarfs and hot subdwarf stars). Kilogauss upper limits of longitudinal magnetic fields are presented for several brightest DA white dwarfs and new ...
G. Valyavin, S. Bagnulo, S. Fabrika, A. Reisenegger, G. A. Wade, Inwoo Han, D. Monin   +6 more
doaj   +1 more source

Detached white-dwarf close-binary stars -- CV's extended family [PDF]

, 1999
I review detached binaries consisting of white dwarfs with either other white dwarfs or low mass main-sequence stars in tight orbits around them. Orbital periods have been measured for 15 white dwarf/white dwarf systems and 22 white dwarf/M dwarf systems.
Marsh, T. R.
core   +3 more sources

Throwing Icebergs at White Dwarfs [PDF]

, 2017
White dwarfs (WDs) have atmospheres that are expected to consist nearly entirely of hydrogen and helium, since heavier elements will sink out of sight on short timescales.
A. Stephan, S. Naoz, B. Zuckerman
semanticscholar   +1 more source

WHITE DWARFS

Le Journal de Physique Colloques, 1980
The thermal properties and neutrino emissivity of matter in the dense, degenerate cores of white dwarfs, together with efficient heat transport through the high-density envelopes of these stars, affect the theoretical white dwarf luminosity function.
openaire   +1 more source

Histochemical indications for a chemically complex signal produced by the cervical gill slit gland of the pygmy sperm whale (Kogia breviceps)

The Anatomical Record, EarlyView.
Abstract The pygmy sperm whale (Kogia breviceps) possesses an exocrine gland associated with its false gill slit pigmentation pattern. The cervical gill slit gland is a compound tubuloalveolar gland that produces a holocrine secretion and displays maturational changes in size and secretory histology. While the morphology of the cervical gill slit gland
Tiffany F. Keenan, William A. McLellan, Sentiel A. Rommel, Alexander M. Costidis, Craig A. Harms, J. G. M. Thewissen, Susan J. Rehorek, David S. Rotstein, Mark D. Gay, Alison R. Taylor, Heather N. Koopman, Ying Wang, Stephanie Kamel, D. Ann Pabst   +13 more
wiley   +1 more source

New white dwarfs in the Hyades --Results from kinematic and photometric studies

, 2011
On the basis of the PPMXL catalogue (R\"oser, Demleitner & Schilbach, 2010) we searched for white dwarfs that are also member candidates of the Hyades in a region up to 40 pc from the cluster centre. We use the proper motions from PPMXL in the convergent
Barbier-Brossat, Barbier-Brossat, Böhm-Vitense, Catalán, De Gennaro, Dehnen, Ducourant, E. Schilbach, Eggen, Eggen, Famaey, Farihi, Fellhauer, Giclas, Greenstein, Gunn, Humason, Hussain, Jester, Just, Kharchenko, Kharchenko, Klemola, Koester, Koester, Lasker, Lawrence, Liebert, McCook, Morrissey, Napiwotzki, Nordström, Pauli, Pauli, Piskunov, Reid, Röser, Röser, S. Röser, Salim, Silvestri, Silvestri, Silvestri, Skrutskie, Stauffer, Stern, van Altena, van Altena, van Leeuwen, van Rhijn, von Hippel, Weidemann, Zacharias, Zacharias, Zuckerman   +54 more
core   +1 more source

When flux standards go wild: white dwarfs in the age of Kepler [PDF]

, 2017
White dwarf stars have been used as flux standards for decades, thanks to their staid simplicity. We have empirically tested their photometric stability by analyzing the light curves of 398 high-probability candidates and spectroscopically confirmed ...
J. Hermes, B. Gaensicke, N. G. Fusillo, R. Raddi, M. Hollands, E. Dennihy, J. Fuchs, S. Redfield   +7 more
semanticscholar   +1 more source

Magnetars and white dwarf pulsars [PDF]

International Journal of Modern Physics D, 2016
The anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs) are a class of pulsars understood as neutron stars (NSs) with super strong surface magnetic fields, namely [Formula: see text][Formula: see text]G, and for that reason are known as magnetars.
Manuel Malheiro, R. V. Lobato, Jaziel G. Coelho   +2 more
openaire   +3 more sources