Be stars spectroscopy an example of Pro-Am collaboration Franois - PowerPoint PPT Presentation

Be stars spectroscopy an example of Pro-Am collaboration François Cochard – Aude / Shelyak Instruments François Cochard – Aude / Shelyak Instruments

Agenda Spectrography : a new field for ProAm collaborations Be stars : good targets for amateurs BeSS & ArasBeam program Results so far Conditions for success

Spectro : a new field for amateurs

Spectro becomes mature + Software tools : Vspec, Isis, Audela...

Spectrum example : Vega ➢ Low resolution ➢ ~R = 1,000 ➢ Large bandwidth ➢ Short exposure time ➢ High resolution ➢ ~R = 10,000 ➢ Line profile details

Amateur work When amateurs work together, they become a new kind of instrument for the Astronomy community High number of objects Periodical observations, surveys Reactivity

Amateur work Amateur can manage long term observations

Be stars 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 Observations wanted ! C.Buil

Be star spectrum Outburst !

North hemisphere 924 Be stars DEC > -25° Be par magnitude 100 stars M<6 1000 900 200 stars M<7 800 Nb d'étoiles Hémisphère Nord 700 300 stars M<8 600 500 400 300 200 100 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Magnitude limite

BeSS database http://basebe.obspm.fr/basebe/ 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 observatory(LESIA) A standard file format (based on FITS) NEW : Herbig Ae/Be are now in BeSS !

BeSS

ArasBeam 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

ArasBeam http://arasbeam.free.fr/ http://arasbeam.free.fr/ Star to be observed Star to be observed

BeSS monthly report

BeSS monthly report

Observations status 49 amateur observers recorded Total Sur 12 mois Pros Am Total Pros Am Total Nb total de spectres 43460 28885 72345 0 9021 9021 Nb de spectres Ha 781 7216 7997 0 1841 1841 And a dozen of outbursts !

Observation status Nb d'observations Ha Amateurs 2000 1800 1600 1400 1200 1000 800 600 400 200 0 2007 2008 2009 2010 2011 2012 Année

Publications Publications using BeSS database

Bet Lyrae : Sheliak !

14 Lac

V442 And

FF Cam : publication !

Conditions for success ➤ 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... What is the next long term ProAm observing program ?

Useful links 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

Merci !