some rarely visited Be stars
Posted: Sat Aug 03, 2019 10:55 pm
I have started looking at some of the stars which have no spectra in BeSS or the spectra are very old. I am using the LHIRES 1200l/mm (R~5500) as they are quite faint for the 2400l/mm grating
Here are a couple of interesting ones so far
V415 Lac (Vmag 9.2) was last measured in 1995 ! The EW of the H alpha emission now is approximately half that in 1995 bd+61 2494 (Vmag 10.0) has no previous spectra in BeSS. The star itself currently shows no emission, but it is embedded in an HII region and the sky background shows H alpha Cheers
Robin
Here are a couple of interesting ones so far
V415 Lac (Vmag 9.2) was last measured in 1995 ! The EW of the H alpha emission now is approximately half that in 1995 bd+61 2494 (Vmag 10.0) has no previous spectra in BeSS. The star itself currently shows no emission, but it is embedded in an HII region and the sky background shows H alpha Cheers
Robin