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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