Results 181 to 190 of about 2,016,206 (398)

Optical identification of the companion to PSR J1911-5958A, the pulsar binary in the outskirts of NGC 6752

, 2003
We report on the identification of the optical counterpart of the binary millisecond pulsar PSR J1911-5958A, located in the outskirts of the globular cluster NGC 6752. At the position of the pulsar we find an object with V=22.08, B-V=0.38, U-B=-0.49. The
Althaus, Anderson, Assafin, C. G. Bassa, Callanan, Colpi, D'Amico, Dolphin, Dolphin, Driebe, Edmonds, F. Verbunt, Gratton, Holtzman, Holtzman, L. Homer, Lugger, M. H. van Kerkwijk, Phinney, Schlegel, Serenelli, Thorsett, Van Kerkwijk, Zacharias   +23 more
core   +1 more source

Corporate Social Responsibility or Strategic Opportunism? Evidence From High and New Technology Firms

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Corporate Social Responsibility (CSR) presents a dual nature in practice. Beyond its explicit ethical imperatives, it can be strategically instrumentalized to manage external pressures, shape public impression, and even divert attention from corporate misconduct. Acknowledging this complexity, this study investigates the conditions under which
Yang Deng, Assunta Di Vaio, Tze San Ong
wiley   +1 more source

Short Wavelength Limit of the Dynamic Matsubara Local Field Correction

Contributions to Plasma Physics, EarlyView.
ABSTRACT We investigate the short wavelength limit of the dynamic Matsubara local field correction G˜q,zl$$ \tilde{G}\left(\mathbf{q},{z}_l\right) $$ of the uniform electron gas based on direct ab initio path integral Monte Carlo (PIMC) results over an unprecedented range of wavenumbers, q≲20qF$$ q\lesssim 20{q}_{\mathrm{F}} $$, where qF$$ {q}_{\mathrm{
Tobias Dornheim, Panagiotis Tolias, Zhandos A. Moldabekov, Jan Vorberger   +3 more
wiley   +1 more source

Following the Pulsations in the Long-term Cooling of GW Librae and V386 Serpentis

The Astronomical Journal
GW Lib and V386 Ser are dwarf novae systems containing pulsating white dwarfs that underwent large 8–9 mag amplitude outbursts in 2007 and 2019, respectively.
Paula Szkody, Jan van Roestel, Keaton J. Bell, Zachary P. Vanderbosch, Anjum Mukadam, Simone Scaringi   +5 more
doaj   +1 more source

KIC 4552982: outbursts and pulsations in the longest-ever pseudo-continuous light curve of a ZZ Ceti

EPJ Web of Conferences, 2015
KIC 4552982 was the first ZZ Ceti (hydrogen-atmosphere pulsating white dwarf) identified to lie in the Kepler field, resulting in the longest pseudo-continuous light curve ever obtained for this type of variable star.
Bell K. J., Hermes J. J., Bischoff-Kim A., Moorhead S., Castanheira B. G., Montgomery M. H., Winget D. E.   +6 more
doaj   +1 more source

Optical spectroscopy of candidate Alpha Persei white dwarfs

, 2015
As part of an investigation into the high mass end of the initial mass-final mass relation we performed a search for new white dwarf members of the nearby (172.4 pc), young (80-90 Myr) $\alpha$ Persei open star cluster.
Casewell, S. L., Dobbie, P. D., Geier, S., Hambly, N. C., Lodieu, N.   +4 more
core   +1 more source

Instantaneous Normal Modes of Yukawa Liquids

Contributions to Plasma Physics, EarlyView.
ABSTRACT The instantaneous normal mode (INM) approach, which extends the normal mode description of collective excitations in solids to liquids, is applied to strongly coupled, three‐dimensional Yukawa liquids. Based on data from Langevin dynamics simulations, we compute the instantaneous normal modes across a wide range of coupling and screening ...
Tillman Keller, Hanno Kählert
wiley   +1 more source

Tidal Disruption of Planetesimals from an Eccentric Debris Disk Following a White Dwarf Natal Kick

The Astrophysical Journal Letters
The surfaces of many white dwarfs are polluted by metals, implying a recent accretion event. The tidal disruption of planetesimals is a viable source of white dwarf pollution and offers a unique window into the composition of exoplanet systems.
Tatsuya Akiba, Selah McIntyre, Ann-Marie Madigan   +2 more
doaj   +1 more source

Note on the Spectrum of a Probable White Dwarf in h Persei. (Plate 1.) [PDF]

, 1931
Yngve Öhman
openalex   +1 more source

Cooling curves and initial models for low-mass white dwarfs (<0.25 Msun) with helium core

, 2000
We present a detailed calculation of the evolution of low-mass ($< 0.25~M_\odot $) helium white dwarfs. These white dwarfs (the optical companions to binary millisecond pulsars) are formed via long-term, low-mass binary evolution.
Antipova, Jelena, Ergma, Ene, Sarna, Marek J.   +2 more
core   +1 more source