J/AJ/131/2673 Hα radial velocities of AM Her (Kafka+, 2006)
Continued hyperactivity on the secondary star of AM Herculis.
Kafka S., Honeycutt R.K., Howell S.B.
<Astron. J., 131, 2673-2680 (2006)>
=2006AJ....131.2673K 2006AJ....131.2673K
ADC_Keywords: Binaries, cataclysmic ; Radial velocities
Keywords: binaries: close - stars: activity - stars: general -
stars: individual (AM Herculis) - stars: magnetic fields
Abstract:
We present observations in the red region of the spectrum of the
magnetic cataclysmic variable prototype AM Her during its 2005 low
state. We confirm the unexpected structure of the Hα emission
line and verify most of the conclusions of our earlier study: the line
is typically triple-peaked, and the radial velocity curves of all
three components are phased with the radial velocities of absorption
features from the photosphere of the M dwarf secondary star.
Description:
Our spectroscopic data were acquired during several different
observing runs in the summer of 2005. Two nights in 2005 June were
dedicated to monitoring the system using the HYDRA multiobject
spectrograph on the WIYN5 3.5m telescope, at Kitt Peak, Arizona.
Photometric observations were made with the 1.25m telescope at the
Morgan-Monroe Observatory of Indiana University, using a V filter. The
data were acquired on the same nights as the WIYN spectroscopy and
were as nearly simultaneous as the longitude difference and weather
would allow.
Objects:
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RA (2000) DE Designation(s)
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18 16 13.3 +49 52 04 AM Her = V* AM Her
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 43 71 Hα 2005 Radial Velocities
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID Running Identification number
4- 16 F13.5 d HJD Heliocentric Julian Date
18- 23 F6.4 --- Phase Phase
25- 28 I4 km/s RVB ? Blue satellite component radial velocity
30- 33 I4 km/s RVC Central component radial velocity
35- 37 I3 km/s RVR ? Red satellite component radial velocity
39- 43 F5.1 0.1nm EW Total Hα equivalent width in Angstroms
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 17-Aug-2007