Results 111 to 120 of about 112,298 (365)
Constitution of the White Dwarf Stars [PDF]
Nature, 1931 IT is generally held that the white dwarf is in the degenerate state in the sense of the statistics of Fermi and Dirac. This assumption leads to another consequence bearing on the relative abundance of elements in the same star. Assuming further that (i) all atoms of various elements in the white dwarf are stripped of their extranuclear electrons, and (
openaire +2 more sources
, 2011 The surface abundances of extreme helium (EHe) and R Coronae Borealis (RCB) stars are discussed in terms of the merger of a carbon-oxygen white dwarf with a helium white dwarf.
A. I. Karakas +95 more
core +1 more source
The Insistence of Blackness and the Persistence of Antiblackness in Ireland
Australian Journal of Social Issues, EarlyView.ABSTRACT This paper positions Ireland as a critical site for examining the insistence of blackness and an antiblackness created and sustained through Irish ethnonationalist imaginaries and exclusionary processes. Drawing on connected sociologies and Irish Black Studies, this enquiry argues that antiblackness in Ireland operates as a generational force,
Philomena Mullen
wiley +1 more source
Spectroscopic confirmation of a white dwarf companion to the B star 16 Dra [PDF]
, 2000 Using an Extreme Ultraviolet Explorer (EUVE) spectrum, we confirm the identification of a white dwarf companion to the B9.5V star 16 Dra (HD150100), and constrain its surface temperature to lie between 29,000K and 35,000K.
Barstow, Martin, Burleigh, Matt
core +1 more source
The population of single and binary white dwarfs of the Galactic bulge
, 2018 Recent Hubble Space Telescope observations have unveiled the white dwarf cooling sequence of the Galactic bulge. Although the degenerate sequence can be well fitted employing the most up-to-date theoretical cooling sequences, observations show a ...
Calamida, A. +3 more
core +1 more source
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 +13 more
wiley +1 more source
Locating Traces of Arboreal Beings: Connecting the Tree and the Woodblock
Archaeology in Oceania, EarlyView.ABSTRACT Woodblocks for printmaking are multi‐perspectival communicators inscribed with layered narratives. The artistic process of cutting excavates the surface of a woodblock, making visible lesser‐seen traces of the past, reflective of the practice of archaeology.
Julian Laffan
wiley +1 more source
Si:P as a laboratory analogue for hydrogen on high magnetic field white dwarf stars
Nature Communications, 2013 Laboratory spectroscopy of atomic hydrogen in a magnetic flux density of 105 T (1 gigagauss), the maximum observed on high-field magnetic white dwarfs, is impossible because practically available fields are about a thousand times less.
B. Murdin +13 more
semanticscholar +1 more source
An upper limit to the secular variation of the gravitational constant from white dwarf stars [PDF]
, 2011 A variation of the gravitational constant over cosmological ages modifies the main sequence lifetimes and white dwarf cooling ages. Using an state-of-the-art stellar evolutionary code we compute the effects of a secularly varying G on the main sequence ...
E. Garc'ia--Berro +4 more
semanticscholar +1 more source
Limits on Unresolved Planetary Companions to White Dwarf Remnants of 14 Intermediate-Mass Stars
, 2009 We present Spitzer IRAC photometry of white dwarf remnants of 14 stars with M = 3-5 Msol. We do not detect mid-infrared excess around any of our targets.
Andrew Gould +36 more
core +1 more source