Be stars spectroscopyan example of
Pro-Am collaboration
François Cochard – Aude / Shelyak InstrumentsFrançois 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 managelong term observations
Be stars
Active, hot stars, fast rotators (non super-giants)They have shown at least once a balmer line in emission300 Be stars (M < 8) in North hemispherePeriodical emissions, outbursts : several phenomena
involved
C.Buil
Observations wanted !
Be star spectrum
Outburst !
North hemisphere924 Be stars DEC > -25°
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 200
100
200
300
400
500
600
700
800
900
1000
Be par magnitude
Magnitude limite
Nb
d'ét
oile
s H
émis
phèr
e N
ord
100 stars M
BeSS database
Database created in Feb. 2007The reference catalog for Be starsBe star spectra database
ProAm collaboration from the beginningServer hosted and administrated by Paris-Meudon
observatory(LESIA)A standard file format (based on FITS)
NEW : Herbig Ae/Be are now in BeSS !
http://basebe.obspm.fr/basebe/
BeSS
ArasBeam
Http://www.arasbeam.free.fr
Be stars observing program for amateursAn 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 observedStar to be observed
http://arasbeam.free.fr/http://arasbeam.free.fr/
ArasBeam
BeSS monthly report
BeSS monthly report
Observations status
Total Sur 12 moisPros Total Pros Total43460 28885 72345 0 9021 9021
781 7216 7997 0 1841 1841
Am AmNb total de spectres
Nb de spectres Ha
And a dozen of outbursts !
49 amateur observers recorded
Observation status
2007 2008 2009 2010 2011 20120
200400
600800
10001200
14001600
18002000
Nb d'observations Ha Amateurs
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 onlyBinaries and variable stars...
What is the next long termProAm observing program ?
Useful links
BeSS:http://basebe.obspm.fr/
ArasBeAM:http://arasbeam.free.fr/
Arashttp://astrosurf.com/aras/
Aras forumhttp://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
http://www.astrosurf.com/thizy/rochelle2006/rochelle2006.htmhttp://www.astrosurf.com/thizy/rochelle2009/rochelle2009.htmhttp://www.astrosurf.com/thizy/rochelle2009/rochelle2009.htm
Merci !
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