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Quote:This is very interesting. I wonder if these were taken over a period of a year if any change would be detected.
Quote:Quote:This is very interesting. I wonder if these were taken over a period of a year if any change would be detected. 'Yes' must be the answer but even for known variable stars the spectral changes can be very subtle - Beta Lyrae is a classic emission-line binary where the line intensity changes with the binary period. This has been known, if not fully understood, for a century but there's little or no pro work on it nowerdays [they like to work at the edge of the universe with the biggest scopes available whilst perfect 1.5m scopes worldwide obscenely gather dust ] - so many stars, so little time and too few spectroscopists
Dabble in H-alpha solar, lunar, planetary, deep sky astrophotography and spectroscopy....so much to see and do!
Quote:The lack of interest in stellar spectroscopy with the 1.5m scopes you refer to probably has more to do with the competition for research funding. The more spectacular, news worthy research tends to get the lion's share of funding and telescope time while those interested in more basic, or, less spectacular research get only scraps in terms of funding. I see it here at Lawrence Livermore National Lab all the time.
Quote:Beta Lyrae is a classic emission-line binary where the line intensity changes with the binary period. This has been known, if not fully understood, for a century but there's little or no pro work on it nowerdays.
Meade 305 ƒ/10.4 LX200 • Royce 250 ƒ/19 Dall Kirkham • AstroTech 250 ƒ/8 RC • AstroTech 250 ƒ/4 "RFT" Newtonian • Meade 80 ƒ/6 ED APO • TEC 140 ƒ/7 APO • Orion 180 ƒ/15 Mak Cass ... Denkmeier II binoviewer - Nikon 8x60 binocular
Astronomical Files from Black Oak Observatory