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J/ApJ/689/461 Circumstellar disk of chi Oph (Tycner+, 2008)
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Beginning of ReadMe :J/ApJ/689/461 Circumstellar disk of chi Oph (Tycner+, 2008)
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Constraining the physical parameters of the circumstellar disk of chi
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
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ADC_Keywords: Stars, Be ; Models ; Interferometry
Keywords: stars: emission-line, Be - stars: individual (chi Ophiuchi)
Abstract:
We present a numerical model describing a circularly symmetric gaseous
disk around the Be star chi Ophiuchi. The model is constrained by
long-baseline interferometric observations that are sensitive to the
Halpha Balmer line emission from the disk. For the first time, our
interferometric observations spatially resolve the inner region of the
circumstellar disk around chi Oph, and we use these results to place
a constraint on the physical extent of the Halpha-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 chi 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:
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RA (2000) DE Designation(s)
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16 27 01.4 -18 27 23 chi Ophiuchi = HD 148184
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