Results 1 to 10 of about 497,246 (250)
Helium Shell Detonations on Low Mass White Dwarfs as a Possible Explanation for SN 2005E
, 2010 Recently several type Ib supernovae (SNe; with the prototypical SN 2005E) have been shown to have atypical properties. These SNe are faint (absolute peak magnitude of ~ -15) and fast SNe that show unique composition.
Ami Glasner +21 more
core +1 more source
, 2006 We study the possibility of the helium decoupling in the stellar wind of sigma Ori E. To obtain reliable wind parameters for this star we first calculate an NLTE wind model and derive wind mass-loss rate and terminal velocity.
Groote, Detlef +2 more
core +1 more source
Fine structure of helium and light helium-like ions
, 2010 Calculational results are presented for the fine-structure splitting of the 2^3P state of helium and helium-like ions with the nuclear charge Z up to 10.
Pachucki, Krzysztof +1 more
core +1 more source
Free-energy model for fluid helium at high density [PDF]
, 2004 We present a semi-analytical free-energy model aimed at characterizing the thermodynamic properties of dense fluid helium, from the low-density atomic phase to the high-density fully ionized regime. The model is based on a free-energy minimization method
Christophe Winisdoerffer +3 more
core +2 more sources
Method and apparatus for generating coherent radiation in the ultra-violet region and above by use of distributed feedback [PDF]
, 1976 Helium in the superfluid state emits copious amounts of radiation in the ultraviolet region when excited by an electron stream. Conventional laser action using mirrors is impossible in superfluid helium because there are no mirrors that will reflect VUV ...
Saffren, M. M.
core +1 more source
, 2003 In solar EUV spectra the He I and He II resonance lines show unusual behaviour and have anomalously high intensities compared with other transition region lines.
Aggarwal +73 more
core +1 more source
Electric-field-induced helium-helium resonances
Physical Review A, 2019 The tunability of the helium-helium interaction through an external electric field is investigated. For a static external field, electric-field induced resonances and associated electric-field induced bound states are calculated for the $^4$He-$^4$He, $^3$He-$^4$He, and $^3$He-$^3$He systems. Qualitative agreement is found with the literature for the $^
Guan, Qingze, Blume, Doerte
openaire +3 more sources
In-situ measurement of the permittivity of helium using microwave NbN resonators
, 2008 By measuring the electrical transport properties of superconducting NbN quarter-wave resonators in direct contact with a helium bath, we have demonstrated a high-speed and spatially sensitive sensor for the permittivity of helium. In our implementation a
A. Monfardini +7 more
core +3 more sources
Comparative Evolution of Jupiter and Saturn
, 1998 We present evolutionary sequences for Jupiter and Saturn, based on new nongray model atmospheres, which take into account the evolution of the solar luminosity and partitioning of dense components to deeper layers.
A. Burrows +21 more
core +1 more source