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J/ApJ/689/461          Circumstellar disk of χ Oph           (Tycner+, 2008)

Constraining the physical parameters of the circumstellar disk of χ Ophiuchi. Tycner C., Jones C.E., Sigut T.A.A., Schmitt H.R., Benson J.A., Hutter D.J., Zavala R.T. <Astrophys. J., 689, 461-470 (2008)> =2008ApJ...689..461T
ADC_Keywords: Stars, Be ; Models ; Interferometry Keywords: stars: emission-line, Be - stars: individual (χ Ophiuchi) Abstract: We present a numerical model describing a circularly symmetric gaseous disk around the Be star χ Ophiuchi. The model is constrained by long-baseline interferometric observations that are sensitive to the Hα Balmer line emission from the disk. For the first time, our interferometric observations spatially resolve the inner region of the circumstellar disk around χ Oph, and we use these results to place a constraint on the physical extent of the Hα-emitting region. We demonstrate how this in turn results in very specific constraints on the parameters that describe the variation of the gas density as a function of radial distance from the central star. Description: We acquired interferometric observations of χ Oph on four nights between 2006 June 11 and 2006 June 18 using the Navy Prototype Optical Interferometer (NPOI). We used four different telescopes, resulting in five unique baselines (AC-AE (18.9m), AC-AW (22.2m), AW-W7 (29.5m), AC-W7 (51.6m), and AE-W7 (64.4m)), with AC-W7 baseline signal measured twice on two independent output beams. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 16 27 01.4 -18 27 23 chi Ophiuchi = HD 148184 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 42 132 Calibrated Hα squared visibilities of χ Oph
See also: J/ApJ/654/527 : Interferometric observations of northern Be stars (Gies+, 2007) J/ApJ/652/458 : BVRHα photometry of candidates Be stars (Wisniewski+, 2006) J/AZh/73/194 : Circumstellar Disks of Ae/Be Herbig Stars (Grinin+ 1996) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 8 F8.3 d JD Julian Date (JD-2450000.0) 10- 16 F7.3 10+6/rad u Spatial frequency u in 106cycles/radian units 18- 24 F7.3 10+6/rad v Spatial frequency v in 106cycles/radian units 26- 30 F5.3 --- V2Ha Squared visibility in Hα channel 32- 36 F5.3 --- e_V2Ha Uncertainty in V2Ha 38- 42 A5 --- Base Baseline (1)
Note (1): Four different telescopes were used, resulting in five unique baselines: AC-AE = 18.9m, AC-AW = 22.2m, W7-AW = 29.5m, W7-AE = 64.4m, W7-AC = 51.6m. There are 6 baselines per scan (same JD) with the W7-AC measured at two output beams with slightly different wavelength scales and thus resulting in slightly different u and v values for the same baseline length.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 21-Jan-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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