On the discordant measurements of the radial velocity curve of the late-type star in the dwarf nova SS Cygni

1986 ◽  
Vol 305 ◽  
pp. 732 ◽  
Author(s):  
E. L. Robinson ◽  
E.-H. Zhang ◽  
R. J. Stover
Keyword(s):  
Radial Velocity ◽  
Velocity Curve ◽  
Type Star ◽  
Late Type ◽  
Radial Velocity Curve ◽  
Dwarf Nova ◽  
Late Type Star

scholarly journals New Spectroscopic Observations of Dwarf Nova BZ Ursae Majoris with Extremely Unusual Emission Lines Profiles

2004 ◽  
Vol 194 ◽  
pp. 269-269 ◽  
Author(s):  
V. V. Neustroev ◽  
S. V. Zharikov ◽  
A. Medvedev ◽  
A. Shearer
Keyword(s):  
Radial Velocity ◽  
Emission Line ◽  
Velocity Curve ◽  
Emission Lines ◽  
Radial Velocity Curve ◽  
Dwarf Nova ◽  
Preliminary Results ◽  
Spectroscopic Observations ◽  
Medium Resolution ◽  
Hα Emission

We present preliminary results of new spectroscopic observations of dwarf nova BZ UMa in quiescence. Fifty medium resolution spectra allow us to reproduce the radial velocity curve from the Hα emission line. We confirm that BZ UMa shows extremely unusual emission lines profiles, Unlike the classical single or the double-peaked profiles usually observed in spectra of dwarf novae, emission lines of BZ UMa consist of at least five peaks.

A Late-Type Star of Very Large Radial Velocity

1956 ◽  
Vol 68 ◽  
pp. 533 ◽  
Author(s):  
George W. Preston ◽  
William P. Bidelman
Keyword(s):  
Radial Velocity ◽  
Type Star ◽  
Late Type ◽  
Late Type Star

scholarly journals Discrepant Measurements of the Radial Velocities of SS Cygni: Solution to the Problem

1987 ◽  
Vol 93 ◽  
pp. 113-118
Author(s):  
E.L. Robinson
Keyword(s):  
Radial Velocity ◽  
Accretion Disk ◽  
White Dwarf ◽  
Center Of Mass ◽  
Velocity Curve ◽  
Radial Velocities ◽  
Radial Velocity Curve ◽  
Dwarf Nova

AbstractWe show that the discrepancies among the various measurements of the radial velocity curve of the K5 V star in the dwarf nova SS Cyg have been caused by (1) poor choices of lines for measuring its velocity and (2) large distortions in its velocity caused by heating from the white dwarf and its accretion disk. The correct K velocity of the center of mass of the K5 V star is 158 ± 3 km s−1.

scholarly journals Red Spectroscopy of IP Pegasi

1987 ◽  
Vol 93 ◽  
pp. 145-149
Author(s):  
J.S. Martin ◽  
D.H.P. Jones ◽  
R.C Smith
Keyword(s):  
Radial Velocity ◽  
Cross Correlation ◽  
Main Sequence ◽  
Mass Function ◽  
Velocity Curve ◽  
Absorption Lines ◽  
Radial Velocity Curve ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Dwarf Nova

AbstractTime resolved spectroscopy of the dwarf nova IP Pegasi in the range λλ 7670–8320Å shows absorption lines originating from the cool secondary. A radial velocity curve for this component has been derived by cross-correlation with a normal M star. The curve has semi-amplitude K2 = 288.3 ± 4 km s−1, and is slightly distorted. This distortion is equivalent to an orbit with an apparent eccentricity of 0.075 ± 0.024. The mass function of the primary is 0.394 ± 0.016M⊙. From this we derive constraints on the component masses of 0.62 < M1 < 1.14M⊙ and 0.17 < M2 < 0.71M⊙. The red star has a radius in the range 0.32 < R2 < 0.51R⊙ and is probably on the main sequence.

scholarly journals Evidence of a Low-Mass Companion to AB Doradus

1998 ◽  
Vol 164 ◽  
pp. 325-326
Author(s):  
J. C. Guirado ◽  
J. E. Reynolds ◽  
J.-F. Lestrade ◽  
R. A. Preston ◽  
D. L. Jauncey ◽  
...  
Keyword(s):  
Satellite Data ◽  
Main Sequence ◽  
Brown Dwarfs ◽  
Type Star ◽  
Late Type ◽  
Hydrogen Burning ◽  
Late Type Star ◽  
Low Mass

AbstractFrom the combination of VLBI phase-referenced observations and Hipparcos satellite data, we have found evidence of a low-mass object orbiting the late-type star AB Doradus. The mass of the new object is near the hydrogen burning limit and will constitute a precise point for calibrating the low end of the main sequence. This represents the first detection of a low-mass stellar companion using the VLBI technique, which could become an important tool in future searches for planets and brown dwarfs orbiting other stars.

scholarly journals The Radial Velocity Curve of V652 Her (BD+13°3224)

1985 ◽  
Vol 87 ◽  
pp. 109-115
Author(s):  
P.W. Hill ◽  
C.S. Jeffery
Keyword(s):  
Radial Velocity ◽  
Time Resolution ◽  
High Frequency ◽  
Velocity Curve ◽  
Velocity Data ◽  
Effective Surface ◽  
Radial Velocity Curve ◽  
Minimum Radius ◽  
Helium Star ◽  
Radial Velocity Data

AbstractNew radial velocity data for the pulsating extreme helium star V652 Her (BD+13°3224) have been obtained with a time resolution of 100 s. High frequency structure in the radial velocity curve is detected, and a comparison with previous data suggests that the detailed shape of the velocity curve is variable. The data imply that the effective surface gravity must increase by a factor of 4 at minimum radius.

The radial-velocity curve of V1010 Ophiuchi - Orbital elements and the rotational disturbance

1988 ◽  
Vol 100 ◽  
pp. 371 ◽  
Author(s):  
Thaddeus F. Worek ◽  
Eugene R. Zizka ◽  
Merle W. King ◽  
Joost H. Kiewiet de Jonge
Keyword(s):  
Radial Velocity ◽  
Velocity Curve ◽  
Orbital Elements ◽  
Radial Velocity Curve

scholarly journals A SUPER-JUPITER ORBITING A LATE-TYPE STAR: A REFINED ANALYSIS OF MICROLENSING EVENT OGLE-2012-BLG-0406

2014 ◽  
Vol 782 (1) ◽  
pp. 48 ◽  
Author(s):  
Y. Tsapras ◽  
J.-Y. Choi ◽  
R. A. Street ◽  
C. Han ◽  
V. Bozza ◽  
...  
Keyword(s):  
Type Star ◽  
Late Type ◽  
Late Type Star

scholarly journals Doppler imaging of the young late-type star LO Pegasi (BD+22°4409) in 2003 September

2008 ◽  
Vol 387 (1) ◽  
pp. 237-246 ◽  
Author(s):  
N. Piluso ◽  
A. F. Lanza ◽  
I. Pagano ◽  
A. C. Lanzafame ◽  
J.-F. Donati
Keyword(s):  
Doppler Imaging ◽  
Type Star ◽  
Late Type ◽  
Late Type Star
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