J/ApJ/654/527 Interferometric observations of northern Be stars (Gies+, 2007)
CHARA array K'-band measurements of the angular dimensions of Be star disks.
Gies D.R., Bagnuolo W.G.JR, Baines E.K., Ten Brummelaar T.A.,
Farrington C.D., Goldfinger P.J., Grundstrom E.D., Huang W.,
McAlister H.A., Merand A., Sturmann J., Sturmann L., Touhami Y.,
Turner N.H., Wingert D.W., Berger D.H., McSwain M.V., Aufdenberg J.P.,
Ridgway S.T., Cochran A.L., Lester D.F., Sterling N.C., Bjorkman J.E.,
Bjorkman K.S., Koubsky P.
<Astrophys. J., 654, 527-543 (2007)>
=2007ApJ...654..527G 2007ApJ...654..527G
ADC_Keywords: Stars, Be ; Stars, emission ; Interferometry
Keywords: stars: emission-line, Be -
stars: individual (γ Cas; φ Per; ζ Tau; κ Dra) -
techniques: interferometric
Abstract:
We present the first K'-band, long-baseline interferometric
observations of the northern Be stars γ Cas, φ Per, ζ
Tau, and κ Dra. The measurements were made with multiple
telescope pairs of the CHARA Array interferometer and in every case
the observations indicate that the circumstellar disks of the targets
are resolved. We fit the interferometric visibilities with predictions
from a simple disk model that assumes an isothermal gas in Keplerian
rotation. We derive fits of the four model parameters (disk base
density, radial density exponent, disk normal inclination, and
position angle) for each of the targets.
Description:
The Georgia State University Center for High Angular Resolution
Astronomy (CHARA) Array observations were made on various dates during
the first 2 years of operation.
Objects:
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RA (2000) DE Designation(s) SpType Period(d)
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00 56 43 +60 43.0 gamma Cas = * gam Cas B0.5Ve 203.59
12 33 29 +69 47.3 kappa Dra = * kap Dra B5-6IIIe 62.56
01 43 40 +50 41.3 phi Per = V* phi Per B0.5III-Ve 126.67
05 37 39 +21 08.6 zeta Tau = * zet Tau B2IIIpe 132.91
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 59 153 Calibrated K' visibilities
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Target name
11- 21 F11.3 d HJD Heliocentric Julian Date
23- 27 F5.3 --- Phase Orbital phase
29- 33 A5 --- TPair Telescope pairing
35- 40 F6.2 m Base Telescope pair baseline
42- 47 F6.2 deg PA Position angle of the target as viewed from
the telescope pair
49- 53 F5.3 --- Vis Calibrated visibility with Base
55- 59 F5.3 --- e_Vis Error in Vis (1)
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Note (1): The formal visibility errors listed here may underestimate
the actual errors by a factor of ∼2.8 (Section 2.2).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 12-Nov-2008