Results 41 to 50 of about 73,128 (295)
A Comprehensive Spectroscopic Analysis of DB White Dwarfs [PDF]
, 2011 We present a detailed analysis of 108 helium-line (DB) white dwarfs based on model atmosphere fits to high signal-to-noise optical spectroscopy. We derive a mean mass of 0.67 Mo for our sample, with a dispersion of only 0.09 Mo. White dwarfs also showing
A. Beauchamp +51 more
core +1 more source
Double White Dwarf Merger Products among High-mass White Dwarfs [PDF]
The Astrophysical Journal, 2020 Abstract Double white dwarf (double-WD) binaries may merge within a Hubble time and produce high-mass WDs. Compared to other high-mass WDs, the double-WD merger products have higher velocity dispersion because they are older. With the power of Gaia data, we show strong evidence for double-WD merger products among high-mass WDs by ...
Sihao 浩 Cheng 程思 +3 more
openaire +2 more sources
An Exploration of Spotted White Dwarfs from K2 [PDF]
, 2018 The 21st European Workshop on White Dwarfs was held in Austin, TX from July 23rd to 27th of 2018The Kepler K2 mission has discovered a significant population of white dwarf stars that exhibit photometric variability due to surface inhomogeneities ...
Clemens, J. Christopher +2 more
core +1 more source
Forging Neon-distilling White Dwarfs in the Stellar Engulfments of Helium White Dwarfs
The Astrophysical JournalOnce carbon–oxygen white dwarfs cool sufficiently, they crystallize from the inside out. If the white dwarf is rich enough in ^22 Ne, these crystallized solids are buoyant and rapidly rise, efficiently liberating potential energy, which may halt the ...
Nicholas Z. Rui, Jim Fuller
doaj +1 more source
Effects of modified gravity on microscopic properties and cooling timescale of white dwarfs
Physics Letters BThere are currently two open questions in white dwarf physics: why are massive dwarfs observed less often in astronomical surveys, and why have not any super-Chandrasekhar white dwarfs been found despite the discovery of more than a dozen peculiar ...
Aneta Wojnar +2 more
doaj +1 more source
Neural Network identification of halo white dwarfs [PDF]
, 1998 The white dwarf luminosity function has proven to be an excellent tool to study some properties of the galactic disk such as its age and the past history of the local star formation rate.
Garcia-Berro, Enrique +2 more
core +3 more sources
Advanced Science, EarlyView.Mid‐infrared optoacoustic microscopy (MiROM) acquires lipid‐ and protein‐ associated vibrational contrast in intact fat tissue without dyes, preserving native tissue architecture. Through lateral and axial segmentation, MiROM tracks intrinsic intracellular changes during postnatal remodeling. A quantitative spatial analysis tool (Q‐SAT) maps white‐ and
Myeongseop Kim +7 more
wiley +1 more source
Stark Broadening and White Dwarfs
Open Astronomy, 2011 White dwarf and pre-white dwarfs are the best types of stars for the application of Stark broadening research results in astrophysics, since in the atmospheres of these stars physical conditions are very favorable for this line broadening mechanism - in ...
Dimitrijević Milan S. +3 more
doaj +1 more source
The Astronomical Journal, 2023 Excess infrared flux from white dwarf stars is likely to arise from a dusty debris disk or a cool companion. In this work, we present near-infrared spectroscopic observations with Keck/MOSFIRE, Gemini/GNIRS, and Gemini/Flamingos-2 of seven white dwarfs ...
Dylan Owens +9 more
doaj +1 more source
Biomimetic Cell Membrane‐Coated MOFs System for Targeted Cancer Therapy
Advanced Science, EarlyView.Biomimetic MOF‐based drug delivery nanoplatforms synthesized using liposomes or cell membranes as camouflage for multiple cancer therapeutics. ABSTRACT The integration of metal‐organic frameworks (MOFs) with cell membrane coatings has emerged as a revolutionary strategy to enhance the therapeutic efficacy of cancer nanomedicine.
Qilu Wu +6 more
wiley +1 more source