AN INNER GASEOUS DISK AROUND THE HERBIG Be STAR MWC 147

Journal Article · Sat Nov 20 04:00:00 EST 2010 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/724/1/L5· OSTI ID:21452676

Bagnoli, T; Van Lieshout, R; Van der Plas, G; Meerburg, P D ^[1]; Acke, B; Van Winckel, H; Raskin, G ^[2]

---

1. Astronomical Institute 'Anton Pannekoek', University of Amsterdam, Science Park 904, 1098 XH Amsterdam (Netherlands)
2. Instituut voor Sterrenkunde, K.U. Leuven, Celestijnenlaan 200 D, 3001 Leuven (Belgium)

We present high spectral resolution, optical spectra of the Herbig Be star MWC 147, in which we spectrally resolve several emission lines, including the [O I] lines at 6300 and 6363 A. Their highly symmetric, double-peaked line profiles indicate that the emission originates in a rotating circumstellar disk. We deconvolve the Doppler-broadened [O I] emission lines to obtain a measure of emission as a function of distance from the central star. The resulting radial surface brightness profiles are in agreement with a disk structure consisting of a flat, inner, gaseous disk and a flared, outer, dust disk. The transition between these components at 2-3 AU corresponds to the estimated dust sublimation radius. The width of the double-peaked Mg II line at 4481 A suggests that the inner disk extends to at least 0.10 AU, close to the corotation radius.

• OSTI ID: 21452676
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 724; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BRIGHTNESS
EMISSION
EVAPORATION
MAIN SEQUENCE STARS
OPTICAL PROPERTIES
PHASE TRANSFORMATIONS
PHOTON EMISSION
PHYSICAL PROPERTIES
PROTOPLANETS
STARS
SUBLIMATION