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28 Tau ARAS monitoring
Posted: Mon Oct 12, 2015 9:34 am
by Ernst Pollmann
Dear colleagues,
attached you can find the ARAS monitoring of the Be star 28 Tau. As you can see, the last periastron is obviously past already. It's a pity, because the next will be in approx. 218 days.
Ernst Pollmann
Re: 28 Tau ARAS monitoring
Posted: Sat Oct 29, 2016 5:28 am
by James Foster
To Ernst,
By chance I shot Pleione on 10Oct16, here is the graphic of the Ha region:
Are these to Fe2 lines real? Its curious that there so prominent in this region.
I've formatted the 1D spectral .fit file for BeSS and it can be downloaded here:
http://www.astroimage.info/spectra/HD23 ... 102016.tif
Please rename the suffix .tif to .fit. When I leave it as filename.fit, my server
doesn't permit downloading.
James Foster
Los Angeles, CA
Re: 28 Tau ARAS monitoring
Posted: Sun Oct 30, 2016 8:37 am
by Ernst Pollmann
Hi James,
I didn't find any information of the FeII lines (6456.376 & 6516.53) in literature. But at least it seems to be real, by comparison with the BeSS spectrum of Tim Lester at the same date. On the other hand, these both Fe lines are absent in a ELODIE spectrum from 2003 (see the Fig. below).
So, I can't say anymore to that observation fact.
- 28tau.png (115.25 KiB) Viewed 113243 times
Ernst
Re: 28 Tau ARAS monitoring
Posted: Sun Oct 30, 2016 12:05 pm
by James Foster
To: Ernst,
Thanks for the confirm with Tim Lester's spectra. I have additional spectra of this star in Hb and Cak regions
on the same date. Will post them Asap and continue to monitor. Glad you were able to download my spectra.
James Foster
Los Angeles, CA
Re: 28 Tau ARAS monitoring
Posted: Mon Oct 31, 2016 2:02 pm
by James Foster
Here are the Hb & CaK spectra for 28 Tau:
Hb
CaK
Here are the .fits (with .tif endings to permit download) for inclusion into the BeSS database:
Hb:
http://www.astroimage.info/spectra/HD23 ... 102016.tif
CaK:
http://www.astroimage.info/spectra/HD23 ... 102016.tif
I think those Fe2 lines are still present in data I took this morning...will reduce it after sleep/work.....
James Foster
Los Angeles, CA
Re: 28 Tau ARAS monitoring
Posted: Tue Nov 01, 2016 1:10 pm
by James Foster
Here is my 28 Tau data from last night. I think the 2nd Fe2 line is probably the nearby H2O line,
but I kept both together for clarity:
Here is the Hb region shot shot the same night:
While going thru elements_sort.dat, I identified more possible Fe, Fe2, Mn1, & Na2 lines.
I'm sure one of more might also be telluric, but I keep them here for possible
follow-up. Lastly, here is my CaK region, whose H-balmer series is identified:
James Foster
Los Angeles, CA
Re: 28 Tau ARAS monitoring
Posted: Wed Nov 02, 2016 10:13 am
by Ernst Pollmann
Dear colleagues,
don't forget to observe the next periastron passage of the Be binary star 28 Tauri at January 4th 2017.
Attached you can see the current RV and V/R observation of James Foster and Tim Lester.
- 28tau.png (247.45 KiB) Viewed 113160 times
Ernst Pollmann
Re: 28 Tau ARAS monitoring
Posted: Thu Nov 03, 2016 8:58 am
by James Foster
To: Ernst,
Here are the 1D spectra for my last 28 Tau post (31Oct16 data):
http://www.astroimage.info/spectra/HD23 ... 312016.tif
http://www.astroimage.info/spectra/HD23 ... 312016.tif
http://www.astroimage.info/spectra/HD23 ... 312016.tif
As before rename to suffix from .tif to .fit and they'll be perfectly view-able
if your spectra software. Cheers!
James Foster
Los Angeles, CA
Re: 28 Tau ARAS monitoring
Posted: Sun Nov 06, 2016 9:26 am
by Ernst Pollmann
James,
here comes the Halpha EW, V/R and RV evaluation.
The link...
http://astrospectroscopy.de/media/files ... glisch.pdf
... offers some information about previous passages.
- 28tau_RV.jpg (85.55 KiB) Viewed 113082 times
- 28tau_VtoR.jpg (84.98 KiB) Viewed 113082 times
- 28tau_EW.jpg (77.47 KiB) Viewed 113082 times
Ernst
Re: 28 Tau ARAS monitoring
Posted: Thu Nov 10, 2016 4:12 am
by James Foster
To: Ernst,
Thanks for the reference on the probable disk structure of Pleione's disk.
I need to make more observation for this, but it comes up at a difficult time of the
night for me who still works a day job!
James Foster
Los Angeles, CA