Results 51 to 60 of about 2,487,342 (212)

Gravitational Radiation From Binary Systems With Time Varying Masses

Annalen der Physik, Volume 538, Issue 8, August 2026.
We extend the standard approach pioneered in the works by Peters and Mathews to include the mass loss processes of the binary components, by obtaining the variations due to gravitational radiation of the main physical parameters. As an application of our results we consider gravitational radiation emission in binary magnetar systems.
Teodora M. Matei, Cristian A. Croitoru, Tiberiu Harko   +2 more
wiley   +1 more source

TESS Light Curves of Cataclysmic Variables. VI. Intermediate Polars

The Astrophysical Journal Supplement Series
The long and (almost) continuous high-cadence light curves provided by the TESS space mission are ideally suited to study in detail brightness variations in stellar sources on the broad range of timescales between minutes and months.
Albert Bruch
doaj   +1 more source

The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory

Astronomische Nachrichten, Volume 347, Issue 7, August 2026.
ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth, Paško Roje, Stella Vješnica, Stefan Cikota, Alex J. Brown, Mike Kretlow, Marco Azzaro, Santiago Reinhart, Jesús Aceituno, Harry Dawson, Carsten Denker, Torsten Enßlin, Stephan Geier, Thomas Granzer, Thomas Kupfer, Gianluca Li Causi, Samaya Nissanke, José Luis Ortiz, Fernando Pedichini, Katja Poppenhäger, Axel Schwope   +20 more
wiley   +1 more source

The AM Her System RX J1844.2+4454/2MASS J18441496+4454091/ZTF18aapobha

The Astrophysical Journal
Based on ROSAT All-Sky Survey data and optical follow-up observations, we report observations of the cataclysmic variable RX J1844.2+4454/2MASS J18441496+4454091/ZTF18aapobha.
J. Greiner, R. Schwarz, G. H. Tovmassian, M. Orio   +3 more
doaj   +1 more source

Theoretical Light-curve Models of the Symbiotic Nova CN Cha—Optical Flat Peak for 3 Yr

The Astrophysical Journal, 2023
CN Cha is a slow symbiotic nova characterized by a 3 yr long optical flat peak followed by a rapid decline. We present theoretical light curves for CN Cha, based on hydrostatic approximation, and estimate the white-dwarf (WD) mass to be ∼0.6 M _☉ for a ...
Mariko Kato, Izumi Hachisu
doaj   +1 more source

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, Volume 347, Issue 6, July 2026.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

Photometric Analysis of the Cataclysmic Variable Star LT Eri

The Astronomical Journal
LT Eri is a long-period eclipsing cataclysmic variable star (CV). This study investigates its outbursts, negative superhumps (NSHs), tilted-disk precession, eclipse-depth variations, and observed minus calculated ( O – C ) behavior, using photometric ...
Qi-Bin Sun, Sheng-Bang Qian, Li-Ying Zhu, Qin-Mei Li, Fu-Xing Li, Min-Yu Li, Ping Li   +6 more
doaj   +1 more source

Decoding the Hot‐Mitochondrion Paradox

BioEssays, Volume 48, Issue 7, July 2026.
A distributed mechanism of mitochondrial heat generation is proposed in which all ion‐translocating proteins embedded within the inner mitochondrial membrane contribute to localized heat generation. All ion‐translocating proteins embedded within the inner mitochondrial membrane (IMM)—with ATP synthase shown here as an example—are proposed to function ...
Peyman Fahimi, Michael Lynch, Chérif F. Matta   +2 more
wiley   +1 more source

Evolution of Cataclysmic Variables with Binary-driven Mass Loss during Nova Eruptions

The Astrophysical Journal
The discrepancies between observations and theoretical predictions of cataclysmic variables (CVs) suggest that there exists unknown angular-momentum-loss mechanism(s) besides magnetic braking and gravitational radiation.
Wen-Shi Tang, Xiang-Dong Li, Zhe Cui
doaj   +1 more source

Nine New Cataclysmic Variable Stars with Negative Superhumps

The Astrophysical Journal
Negative superhumps (NSHs) are signals a few percent shorter than the orbital period of a binary star and are considered to originate from the reverse precession of the tilted disk.
Qi-Bin Sun, Sheng-Bang Qian, Li-Ying Zhu, Wen-Ping Liao, Er-Gang Zhao, Fu-Xing Li, Xiang-Dong Shi, Min-Yu Li   +7 more
doaj   +1 more source