J/AJ/139/2269 P Cyg Hα squared visibility (Balan+, 2010)
The spatially resolved Hα-emitting wind structure of P Cygni.
Balan A., Tycner C., Zavala R.T., Benson J.A., Hutter D.J., Templeton M.
<Astron. J., 139, 2269-2278 (2010)>
=2010AJ....139.2269B 2010AJ....139.2269B
ADC_Keywords: Stars, variable ; Interferometry ; Photometry, H-alpha
Keywords: stars: individual (P Cyg) - stars: winds, outflows -
techniques: interferometric
Abstract:
High spatial resolution observations of the Hα-emitting wind
structure associated with the luminous blue variable star P Cygni were
obtained with the Navy Prototype Optical Interferometer. These
observations represent the most comprehensive interferometric data set
on P Cyg to date. We demonstrate how the apparent size of the
Hα-emitting region of the wind structure of P Cyg compares
between the 2005, 2007, and 2008 observing seasons and how this
relates to the Hα line spectroscopy. Using the data sets from
2005, 2007, and 2008 observing seasons, we fit a circularly symmetric
Gaussian model to the interferometric signature from the H#-emitting
wind structure of P Cyg.
Description:
High angular resolution long-baseline interferometric observations
were obtained on P Cyg over 37 nights in 2005, 2007, and 2008 using
the Navy Prototype Optical Interferometer (NPOI) located near
Flagstaff, Arizona.
We obtained complementary spectroscopy of P Cyg using Lowell
Observatory's John S. Hall 1.1m telescope located at the same
observing site as the NPOI.
Objects:
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RA (2000) DE Designation(s)
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20 17 47.20 +38 01 58.6 P Cyg = HR 7763
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 46 1534 Calibrated Hα squared visibilities of P Cyg
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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- 11 F11.3 d JD Julian Date
13- 20 F8.3 10+6/rad u Spatial frequency u in 10+6cycles/radian
22- 28 F7.3 10+6/rad v Spatial frequency v in 10+6cycles/radian
30- 34 F5.3 --- VHa2 Hα squared visibility
36- 40 F5.3 --- e_VHa2 Uncertainty in VHa2
42- 46 A5 --- Base Baseline configuration
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-May-2012