Estimating Be Star Disk Radii using H-alpha Emission Equivalent Widths

Details Estimating Be Star Disk Radii using H-alpha Emission Equivalent Widths Estimating Be Star Disk Radii using H-alpha Emission Equivalent Widths

2006-09-21

arxiv.org/abs/astro-ph/0609602v1

Astrophys.J.651:L53-L56,2006

Astronomy and Astrophysics

Astrophysics

12 pages, 2 figures, ApJL in press

Scientific paper

10.1086/509635

We present numerical models of the circumstellar disks of Be stars, and we describe the resulting synthetic H-alpha emission lines and maps of the wavelength-integrated emission flux projected onto the sky. We demonstrate that there are monotonic relationships between the emission line equivalent width and the ratio of the angular half-width at half maximum of the projected disk major axis to the radius of the star. These relationships depend mainly upon the temperatures of the disk and star, the inclination of the disk normal to the line of sight, and the adopted outer boundary for the disk radius. We show that the predicted H-alpha disk radii are consistent with those observed directly through long baseline interferometry of nearby Be stars (especially once allowance is made for disk truncation in binaries and for dilution of the observed H-alpha equivalent width by continuum disk flux in the V-band).

Affiliated with

Also associated with

No associations

Rating

Estimating Be Star Disk Radii using H-alpha Emission Equivalent Widths does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Estimating Be Star Disk Radii using H-alpha Emission Equivalent Widths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Estimating Be Star Disk Radii using H-alpha Emission Equivalent Widths will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-134568