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|a 10.1086/316519
|2 doi
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|a (DE-627)JST059426829
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|a (JST)316519
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a en
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|a Bruch, Albert
|e verfasserin
|4 aut
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|a 1
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|c 2000
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|a Text
|b txt
|2 rdacontent
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|a Computermedien
|b c
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|a Online-Ressource
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|a 1 Based on data collected at CNPq/Laboratório Nacionalde Astrofísica, Brazil
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|a ABSTRACT We report about the first time‐resolved photometricobservations of the bright dwarf nova V893 Sco. The optical light curvesshow eclipses recurring with a period of 01:49:23 which are probably causedmainly by the hot spot while the accretion disk center with the white dwarfremains uneclipsed. The light curves show considerablecycle‐to‐cycle variations concerning the mean magnitude, thestrength of the orbital hump, the presence of an intermediate hump, and theamplitude and minimum depth of the eclipses. Light curves in theJ and H bands are essentially constant withoutellipsoidal variations of the secondary star. Surprisingly there is no signof an eclipse at these wavelengths. V893 Sco exhibits a strong flickeringactivity with statistical properties which are remarkably stable whencompared to other cataclysmic variables. The short timescaleflickering (<0.01P orb) is notconfined to the accretion disk but contains a contribution from the hotspot. During one night an oscillation with a periodof 0.02$ minutes was observed. Abeat with the orbital period may also be present. A spectrum taken in therange of Hβ shows the double‐peaked Balmer emission typicalfor high‐inclination dwarf novae and permits one to predict thepresence of a strong S‐wave in time‐resolved spectroscopy,consistent with the prominent orbital hump in the light curves. Theoscillations, the properties of the flickering, the presence of Heii emission, and the hard X‐rays seen byROSAT suggest a connection of V893 Sco to intermediate polars,but there is not yet conclusive evidence for such aclassification.
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|a © 2000. The AstronomicalSociety of the Pacific. All rights reserved. Printed inU.S.A.
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| 650 |
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4 |
|a Physical sciences
|x Astronomy
|x Observational astronomy
|x Occultation
|x Eclipses
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| 650 |
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4 |
|a Physical sciences
|x Metrology
|x Optical measurement
|x Photometry
|x Light curves
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| 650 |
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4 |
|a Physical sciences
|x Astronomy
|x Astronomical objects
|x Accretion disks
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| 650 |
|
4 |
|a Physical sciences
|x Astronomy
|x Astronomical objects
|x Stars
|x Compact stars
|x Degenerate stars
|x White dwarfs
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| 650 |
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4 |
|a Physical sciences
|x Astronomy
|x Astronomical objects
|x Stars
|x Main sequence stars
|x Dwarf stars
|x Dwarf novae
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| 650 |
|
4 |
|a Biological sciences
|x Biology
|x Physiology
|x System physiology
|x Cardiovascular physiology
|x Circulatory system
|x Cardiovascular system
|x Hemic system
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| 650 |
|
4 |
|a Physical sciences
|x Astronomy
|x Astronomical research
|x Astronomical methods
|x Astrometry
|x Radial velocity
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| 650 |
|
4 |
|a Mathematics
|x Mathematical analysis
|x Functional analysis
|x Wavelet analysis
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| 650 |
|
4 |
|a Physical sciences
|x Astronomy
|x Astronomical research
|x Astronomical reference materials
|x Ephemerides
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| 650 |
|
4 |
|a Mathematics
|x Mathematical values
|x Critical values
|x Extrema
|x Mathematical minima
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| 650 |
|
4 |
|a Physical sciences
|x Astronomy
|x Observational astronomy
|x Occultation
|x Eclipses
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| 650 |
|
4 |
|a Physical sciences
|x Metrology
|x Optical measurement
|x Photometry
|x Light curves
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| 650 |
|
4 |
|a Physical sciences
|x Astronomy
|x Astronomical objects
|x Accretion disks
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| 650 |
|
4 |
|a Physical sciences
|x Astronomy
|x Astronomical objects
|x Stars
|x Compact stars
|x Degenerate stars
|x White dwarfs
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| 650 |
|
4 |
|a Physical sciences
|x Astronomy
|x Astronomical objects
|x Stars
|x Main sequence stars
|x Dwarf stars
|x Dwarf novae
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| 650 |
|
4 |
|a Biological sciences
|x Biology
|x Physiology
|x System physiology
|x Cardiovascular physiology
|x Circulatory system
|x Cardiovascular system
|x Hemic system
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| 650 |
|
4 |
|a Physical sciences
|x Astronomy
|x Astronomical research
|x Astronomical methods
|x Astrometry
|x Radial velocity
|
| 650 |
|
4 |
|a Mathematics
|x Mathematical analysis
|x Functional analysis
|x Wavelet analysis
|
| 650 |
|
4 |
|a Physical sciences
|x Astronomy
|x Astronomical research
|x Astronomical reference materials
|x Ephemerides
|
| 650 |
|
4 |
|a Mathematics
|x Mathematical values
|x Critical values
|x Extrema
|x Mathematical minima
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| 650 |
|
4 |
|a Albert
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| 655 |
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4 |
|a research-article
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| 700 |
1 |
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|a Steiner, J. E.
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Gneiding, C. D.
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Publications of the Astronomical Society of the Pacific
|d University of Chicago Press, 1889
|g 112(2000), 768, Seite 237-250
|w (DE-627)312192320
|w (DE-600)2003100-2
|x 15383873
|7 nnns
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| 773 |
1 |
8 |
|g volume:112
|g year:2000
|g number:768
|g pages:237-250
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| 856 |
4 |
0 |
|u https://www.jstor.org/stable/10.1086/316519
|3 Volltext
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4 |
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|u https://doi.org/10.1086/316519
|3 Volltext
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|d 112
|j 2000
|e 768
|h 237-250
|