Be stars spectroscopy an example of Pro-Am collaboration Franois - - PowerPoint PPT Presentation
Be stars spectroscopy an example of Pro-Am collaboration Franois Cochard Aude / Shelyak Instruments Franois Cochard Aude / Shelyak Instruments Agenda Spectrography : a new field for ProAm collaborations Be stars : good targets for
Be stars spectroscopy
an example of Pro-Am collaboration
François Cochard – Aude / Shelyak Instruments François Cochard – Aude / Shelyak Instruments
Spectrography : a new field for ProAm collaborations Be stars : good targets for amateurs BeSS & ArasBeam program Results so far Conditions for success
+ Software tools : Vspec, Isis, Audela...
➢Low resolution ➢~R = 1,000 ➢Large bandwidth ➢Short exposure time ➢High resolution ➢~R = 10,000 ➢Line profile details
When amateurs work together, they become a new kind of instrument for the Astronomy community High number of objects Periodical observations, surveys Reactivity
Amateur can manage long term observations
Active, hot stars, fast rotators (non super-giants) They have shown at least once a balmer line in emission 300 Be stars (M < 8) in North hemisphere Periodical emissions, outbursts : several phenomena involved
C.Buil Outburst !
924 Be stars DEC > -25°
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 100 200 300 400 500 600 700 800 900 1000Be par magnitude
Magnitude limite Nb d'étoiles Hémisphère Nord
100 stars M<6 200 stars M<7 300 stars M<8
Database created in Feb. 2007
The reference catalog for Be stars Be star spectra database
ProAm collaboration from the beginning Server hosted and administrated by Paris-Meudon
A standard file format (based on FITS)
NEW : Herbig Ae/Be are now in BeSS !
http://basebe.obspm.fr/basebe/
Http://www.arasbeam.free.fr Be stars observing program for amateurs An automatic tool to organize observations ➤ Get the best time coverage of Be stars, up to mag. 8 ➤ Detect & track outbursts ➤ Statistical study : only amateurs can observe so many stars over the time
Star to be observed Star to be observed http://arasbeam.free.fr/ http://arasbeam.free.fr/
Total Sur 12 mois Pros Total Pros Total 43460 28885 72345 9021 9021 781 7216 7997 1841 1841 Am Am Nb total de spectres Nb de spectres Ha
And a dozen of outbursts ! 49 amateur observers recorded
2007 2008 2009 2010 2011 2012 200 400 600 800 1000 1200 1400 1600 1800 2000
Nb d'observations Ha Amateurs
Année
Publications using BeSS database
➤ Be stars : magic stars, not (yet) deeply understood
– Evolving quickly, accessible to small instruments
➤ A focused program ➤ Automatic system (BeSS & ArasBeam) ➤ Adapted tools (instruments & software).
➤ People involved on both sides Pros & Am
Be stars are not the only Binaries and variable stars...
BeSS:
http://basebe.obspm.fr/
ArasBeAM:
http://arasbeam.free.fr/
Aras
http://astrosurf.com/aras/
Aras forum
http://spectro-aras.com/forum/index.php
Spectro-l:
http://tech.groups.yahoo.com/group/spectro-l/
Ecoles Pro-Am CNRS:
2003: http://astrosurf.com/aude/oleron/ 2006: http://www.astrosurf.com/thizy/rochelle2006/rochelle2006.htm 2009: http://www.astrosurf.com/thizy/rochelle2009/rochelle2009.htm