Results 91 to 100 of about 36,595 (260)

LAMOST J101356.33+272410.7: A Detached White Dwarf–Main-sequence Binary with a Massive White Dwarf within the Period Gap

The Astrophysical Journal
We report the analysis of the detached eclipsing spectroscopic binary system LAMOST J101356.33+272410.7, which features a massive white dwarf and has an orbital period of 185.82 minutes. Using Large Sky Area Multi-Object Fiber Spectroscopic Telescope and
Yuji He, Hailong Yuan, Zhongrui Bai, Mingkuan Yang, Mengxin Wang, Yiqiao Dong, Xin Huang, Ming Zhou, Qian Liu, Xiaozhen Yang, Ganyu Li, Ziyue Jiang, Haotong Zhang   +12 more
doaj   +1 more source

The Photometric Period and Variability of the Cataclysmic Variable V849 Herculis (PG 1633+115)

, 2012
We report time-resolved photometry of the cataclysmic variable V849 Her, and measure a period of 0.1414 \pm 0.0030 days (3.394 \pm 0.072 hours). We also present photometry taken over several weeks in 2010 and 2011, as well as light curves from 1995 to ...
Ak, Aungwerojwit, Beers, Berry, F.A. Ringwald, Fleming, Gerald D. Rude, Green, Hellier, Honeycutt, Honeycutt, Jonathan J. Roveto, Kazarovets, Kelly S. Khamvongsa, Lomb, Luppino, Misselt, Munari, Press, Robinson, Rodríguez-Gil, Scargle, Stellingwerf, Thorstensen, Warner   +24 more
core   +1 more source

Discovery of a bright eclipsing cataclysmic variable [PDF]

, 2007
We report on the discovery of J0644+3344, a bright deeply eclipsing cataclysmic variable (CV) binary. Spectral signatures of both binary components and an accretion disk can be seen at optical wavelengths.
Augusteijn, Clarke, D. K. Sing, Dhillon, E. M. Green, G. D. Schmidt, Hoard, J. B. Holberg, J. S. Shaw, Knigge, Landolt, M. Lopez-Morales, Marsh, Mason, Mason, Massey, S. B. Howell, Schmidt, Schwarzenberg-Czerny, Walker, Williams, Zacharias   +21 more
core   +2 more sources

Nation‐Building in the Wake of Empire: Identifying Patterns of Minority Policies in the Aftermath of Soviet Collapse

Nations and Nationalism, EarlyView.
ABSTRACT The collapse of the USSR forced newly independent states to forge national identities while grappling with imperial legacies. This study investigates nation‐building strategies in post‐Soviet states during 1990–1999, using the Nation‐Building Policies (NBP) dataset from the ETHNICGOODS project, which includes all socially and politically ...
Emre Amasyalı, Andrei Tarasov
wiley   +1 more source

Discovery of Faint Nebulosity around a Z Camelopardalis–type Cataclysmic Variable in Antlia: Nova Shell or Ancient Planetary Nebula?

The Astronomical Journal
We report our discovery of a faint nebula surrounding a previously little-studied 15th mag variable star, ASASSN-19ds, in the Southern Hemisphere constellation Antlia. Spectra verify that the star is a cataclysmic variable (CV).
Howard E. Bond, Dana Patchick, Daniel Stern, Jonathan Talbot, John R. Thorstensen   +4 more
doaj   +1 more source

The component masses of the cataclysmic variable V347 Puppis [PDF]

, 2004
We present time-resolved spectroscopy and photometry of the double-lined eclipsing cataclysmic variable V347 Pup (=LB 1800). There is evidence of irradiation on the inner hemisphere of the secondary star, which we correct for using a model to give a ...
Armitage, B. Warner, Baptista, Blondin, Boffin, Buckley, C. A. Watson, D. A. H. Buckley, D. A. Smith, D. Steeghs, Davey, de Kool, Dhillon, Dhillon, Dhillon, Dhillon, Diaz, Drew, Eggleton, Friend, Gray, Groot, Harrop-Allin, Honeycutt, Horne, Horne, K. J. van der Heyden, Knigge, Kolb, M. Still, Marsh, Marsh, Marsh, Mason, Mauche, Morales-Rueda, North, Ogilvie, Paczynski, Papadimitriou, Patterson, Politano, Rappaport, S. P. Littlefair, Sawada, Scheffler, Schneider, Shafter, Shafter, Shlosman, Skilling, Smak, Smith, Smith, Spruit, Steeghs, Steeghs, Steeghs, Steeghs, Still, Still, T. D. Thoroughgood, Thoroughgood, Thoroughgood, V. S. Dhillon, Vande Putte, Wade, Warner, Warner, Watson, Watson   +70 more
core   +3 more sources

Cataclysmic Variables as Binary Stars: Then and Now [PDF]

International Astronomical Union Colloquium, 1990
AbstractA brief history is given of the clues that led to the establishment, in the period c. 1950 to 1965, of a universal binary model for novae and related cataclysmic variables. The observational facts, established early in this period by A. H. Joy and R. F. Sanford (selected binary orbits), J. L. Greenstein (spectroscopy) and M. Walker (photometry)
openaire   +1 more source

Advancing Robust Governance in Turbulent Times: The Role of Multi‐Level Governance, Hybrid Governance, and Negotiated Societal Intelligence

Public Administration, EarlyView.
ABSTRACT New research argues that robust governance based on flexible adaptation and proactive innovation is needed in order to uphold core public functions, purposes, and values in times of societal turbulence. However, we have limited knowledge of the conditions for enhancing robust governance.
Jacob Torfing, Tina Bentzen, Tiziana Caponio, Susana Coroado, Scott Douglas, Steven Nõmmik, Tiina Randma‐Liiv, Chiara Russo, Eva Sørensen, Koen Verhoest   +9 more
wiley   +1 more source

Disarticulations in Naples: Cultural political ecology, the green transition, and labour unrest at a Whirlpool factory

Transactions of the Institute of British Geographers, EarlyView.
Abstract This article develops a cultural political ecology approach to disarticulations and labour unrest. The reference point for analysis is a struggle at a Whirlpool factory in Naples that the company announced would close in 2019, six months after signing an agreement with the Italian government, including a multi‐million investment plan.
Carlo Inverardi‐Ferri
wiley   +1 more source

Hibernation Revived by Weak Magnetic Braking [PDF]

, 2006
Cataclysmic variables undergo periodic nova explosions during which a finite mass of material is expelled on a short timescale. The system widens and, as a result, the mass-transfer rate drops.
Martin, Rebecca G., Tout, Christopher A.
core   +3 more sources