Observation by Kevin Gurney: AB Aurigae - Ha activity

Uploaded by

Kevin Gurney

Observer

Kevin Gurney

Observed

2022 Jan 05 - 22:05

Uploaded

2022 Apr 12 - 10:14

Objects

Spectrum

Equipment
  • Celestron C11
  • Lhires II spectrograph
  • Atik 460EX camera
  • MESU 200 mount
Exposure

12 x 300s subs for each spectrum

Location

Sheffield

Target name

AB Aurigae

Title

AB Aurigae - Ha activity

About this image

AB Aurigae is a Herbig Ae star - a young, pre-main sequence star of
spectral type A with emission lines. Activity of the H-alpha emission
line was recorded using the Lhires III high resolution spectrograph
over a two-month period from 5th January 2022. There is clearly a
strong dynamic going on with sporadic appearance of a P-Cygni profile;
absorption and emission components at blue and red sides of the line
respectively. Such profiles are believed to originate in stellar
winds, and that of AB Aurigae is an active area of research [1]

In the image, the time (in days) after the first spectrum is shown in
the top left of each panel. The dotted line is the reference wavelength
for H-alpha.

[1] Perraut, K. et al.  'A Disk Wind in AB Aurigae Traced with Halpha
Interferometry'. Astronomy & Astrophysics 596 (2016)

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