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Related papers: Modeling Eclipses of the Novalike Variable TT Tria…

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This paper aims at revisit the physical and dynamical properties of the warm atomic gas in the inner disk region of classical T Tauri stars (CTTs) and relate them to the properties of the outer dusty disk. We used the high resolution…

The dayside of HD 149026b is near the edge of detectability by the Spitzer Space Telescope. We report on eleven secondary-eclipse events at 3.6, 4.5, 3 x 5.8, 4 x 8.0, and 2 x 16 microns plus three primary-transit events at 8.0 microns. The…

Microlensing perturbations to the flux ratios of gravitationally lensed quasar images can vary with wavelength because of the chromatic dependence of the accretion disk's apparent size. Multiwavelength observations of microlensed quasars…

Cosmology and Nongalactic Astrophysics · Physics 2011-02-25 Jeffrey A. Blackburne , David Pooley , Saul Rappaport , Paul L. Schechter

Binary systems comprise approximately 15 per cent of the near-Earth asteroid population, yet thermal-infrared data are often interpreted for these bodies as if they are single objects. Thermal-IR light curves of binary asteroids (3905)…

Earth and Planetary Astrophysics · Physics 2024-09-20 Samuel L. Jackson , Benjamin Rozitis

As part of the Young Exoplanets Spectroscopic Survey (YESS), this study explores the spot variability of 13 T Tauri Stars (TTSs) in the near-infrared $H$ band, using spectra from the Immersion GRating INfrared Spectrometer (IGRINS). By…

Solar and Stellar Astrophysics · Physics 2024-06-21 Shih-Yun Tang , Christopher M. Johns-Krull , L. Prato , Asa G. Stahl

The disk instability model attributes the outbursts of dwarf novae to a thermal-viscous instability of their accretion disk, an instability to which nova-like stars are not subject. We aim to test the fundamental prediction of the disk…

High Energy Astrophysical Phenomena · Physics 2018-09-19 Guillaume Dubus , Magdalena Otulakowska-Hypka , Jean-Pierre Lasota

We report photometry of the helium-rich cataclysmic variable ES Ceti during 2001-2004. The star is roughly stable at V ~ 17.0 and has a light curve dominated by a single period of 620 s, which remains measurably constant over the 3 year…

Astrophysics · Physics 2009-11-10 Catherine Espaillat , Joseph Patterson , Brian Warner , Patrick Woudt

The properties of accretion disks around stars and brown dwarfs in the SOri cluster (age 3 Myr) are studied based on NIR time series photometry supported by MIR spectral energy distributions. We monitor ~30 young low-mass sources over 8…

Solar and Stellar Astrophysics · Physics 2015-05-13 Alexander Scholz , Xiaoying Xu , Ray Jayawardhana , Kenneth Wood , Jochen Eisloeffel , Ciara Quinn

(Abridged) We report on the analysis of high-speed photometry of the dwarf nova EX Dra through its outburst cycle with eclipse mapping techniques. The eclipse maps show evidence of the formation of a one-armed spiral structure in the disc…

Astrophysics · Physics 2009-10-31 Raymundo Baptista , M. S. Catalan

We explore the origin of FUSE and HST STIS far UV spectra of the dwarf nova, EY Cyg, during its quiescence using \emph{combined} high gravity photosphere and accretion disk models as well as model accretion belts. The best-fitting single…

Astrophysics · Physics 2009-11-10 E. M. Sion , L. Winter , J. A. Urban , G. H. Tovmassian , S. Zharikov , B. T. Gaensicke , M. Orio

We present the results of a multi-component synthetic spectral analysis of the archival far ultraviolet spectra of several key nova-like variables including members of the SW Sex, RW Tri, UX UMa and VY Scl subclasses: KR Aur, RW Tri, V825…

Tidal disruption events (TDEs) are unique probes of evolving accretion in supermassive black holes. Recent models of TDE disks show that they undergo brief thermal instabilities with temporal super-Eddington accretion at late times, which…

High Energy Astrophysical Phenomena · Physics 2026-02-18 Daichi Tsuna , V. Ashley Villar , Anthony L. Piro , Samantha C. Wu

The contact eclipsing binary system XX Leonis (P = 0.97 days, sp A8) has been analysed using the PHOEBE programme, based on the Wilson Devinney code. The BVRI light curves were obtained during spring 2006 using the 20-cm telescope and ST-7…

Astrophysics · Physics 2009-06-25 P. Zasche , M. Wolf , P. Svoboda

V471 Tauri, a white dwarf--red dwarf eclipsing binary in the Hyades, is well known for stimulating development of common envelope theory, whereby novae and other cataclysmic variables form from much wider binaries by catastrophic orbit…

Solar and Stellar Astrophysics · Physics 2015-09-23 Todd R. Vaccaro , Robert E. Wilson , Walter Van Hamme , Dirk Terrell

We present a multi-wavelength analysis of 14 tidal disruption events (TDEs)-including an off-nuclear event associated with an ultra-compact dwarf galaxy-selected for having available thermal X-ray spectra during their late-time UV/optical…

High Energy Astrophysical Phenomena · Physics 2025-11-03 M. Guolo , A. Mummery , S. van Velzen , S. Gezari , M. Nicholl , Y. Yao , M. Karmen , Y. Ajay , T. Wevers , N. LeBaron , R. Chornock

Performing the photometric observations of the cataclysmic variable IPHAS J051814.33+294113.0, we discovered very deep eclipses. The observations were obtained over 14 nights, had a total duration of 56 hours and covered one year. The large…

Solar and Stellar Astrophysics · Physics 2018-06-13 V. P. Kozhevnikov

NSVS 02502726 has been known as a double-lined, detached eclipsing binary that consists of two low-mass stars. We obtained $BVRI$ photometric follow-up observations in 2009 and 2011 to measure improved physical properties of the binary…

Solar and Stellar Astrophysics · Physics 2015-06-12 Jae Woo Lee , Jae-Hyuck Youn , Seung-Lee Kim , Chung-Uk Lee

Aims: We present a photometric study of the deeply eclipsing SW Sex-type nova-like cataclysmic variable star BH Lyn Methods: Time-resolved V-band CCD photometry was obtained for seven nights between 1999 and 2004. Results: We determined 11…

Astrophysics · Physics 2007-05-23 V. Stanishev , Z. Kraicheva , V. Genkov

We use thirteen seasons of R-band photometry from the 1.2m Leonard Euler Swiss Telescope at La Silla to examine microlensing variability in the quadruply-imaged lensed quasar WFI 2026-4536. The lightcurves exhibit ${\sim}\,0.2\,\text{mag}$…

High Energy Astrophysical Phenomena · Physics 2020-06-10 Matthew A. Cornachione , Christopher W. Morgan , Martin Millon , Misty C. Bentz , Frederic Courbin , Vivien Bonvin , Emilio E. Falco

IGR J16493-4348 is an eclipsing supergiant high-mass X-ray binary (sgHMXB), where accretion onto the compact object occurs via the radially outflowing stellar wind of its early B-type companion. We present an analysis of the system's X-ray…

High Energy Astrophysical Phenomena · Physics 2019-03-20 Aaron B. Pearlman , Joel B. Coley , Robin H. D. Corbet , Katja Pottschmidt