28 Tau ARAS monitoring

28 Tau ARAS monitoring

Postby Ernst Pollmann » Mon Oct 12, 2015 9:34 am

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
Attachments
28tau_monitoring.png
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Ernst Pollmann
 
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Re: 28 Tau ARAS monitoring

Postby James Foster » Sat Oct 29, 2016 5:28 am

To Ernst,

By chance I shot Pleione on 10Oct16, here is the graphic of the Ha region:
Image

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/HD23862_Ha10102016.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
James R. Foster
Lhires III (2400 & 1800 ln/mm Grat) Spectroscope,
LISA Visual & IR Kit Spectroscope,
Alpy 600, and Star Analyzer 200
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Re: 28 Tau ARAS monitoring

Postby Ernst Pollmann » Sun Oct 30, 2016 8:37 am

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
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Ernst
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Re: 28 Tau ARAS monitoring

Postby James Foster » Sun Oct 30, 2016 12:05 pm

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
James R. Foster
Lhires III (2400 & 1800 ln/mm Grat) Spectroscope,
LISA Visual & IR Kit Spectroscope,
Alpy 600, and Star Analyzer 200
James Foster
 
Posts: 242
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Re: 28 Tau ARAS monitoring

Postby James Foster » Mon Oct 31, 2016 2:02 pm

Here are the Hb & CaK spectra for 28 Tau:
Hb
Image
CaK
Image

Here are the .fits (with .tif endings to permit download) for inclusion into the BeSS database:
Hb: http://www.astroimage.info/spectra/HD23862_Hb10102016.tif
CaK: http://www.astroimage.info/spectra/HD23862_CaK10102016.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
James R. Foster
Lhires III (2400 & 1800 ln/mm Grat) Spectroscope,
LISA Visual & IR Kit Spectroscope,
Alpy 600, and Star Analyzer 200
James Foster
 
Posts: 242
Joined: Sun Jan 24, 2016 7:14 am

Re: 28 Tau ARAS monitoring

Postby James Foster » Tue Nov 01, 2016 1:10 pm

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:
Image

Here is the Hb region shot shot the same night:
Image

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:
Image

James Foster
Los Angeles, CA
James R. Foster
Lhires III (2400 & 1800 ln/mm Grat) Spectroscope,
LISA Visual & IR Kit Spectroscope,
Alpy 600, and Star Analyzer 200
James Foster
 
Posts: 242
Joined: Sun Jan 24, 2016 7:14 am

Re: 28 Tau ARAS monitoring

Postby Ernst Pollmann » Wed Nov 02, 2016 10:13 am

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
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Ernst Pollmann
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Re: 28 Tau ARAS monitoring

Postby James Foster » Thu Nov 03, 2016 8:58 am

To: Ernst,

Here are the 1D spectra for my last 28 Tau post (31Oct16 data):
http://www.astroimage.info/spectra/HD23862_Ha10312016.tif
http://www.astroimage.info/spectra/HD23862_Hb10312016.tif
http://www.astroimage.info/spectra/HD23862_CaK10312016.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
James R. Foster
Lhires III (2400 & 1800 ln/mm Grat) Spectroscope,
LISA Visual & IR Kit Spectroscope,
Alpy 600, and Star Analyzer 200
James Foster
 
Posts: 242
Joined: Sun Jan 24, 2016 7:14 am

Re: 28 Tau ARAS monitoring

Postby Ernst Pollmann » Sun Nov 06, 2016 9:26 am

James,
here comes the Halpha EW, V/R and RV evaluation.
The link...
http://astrospectroscopy.de/media/files/Periastron_-28-Tau_englisch.pdf
... offers some information about previous passages.
28tau_RV.jpg
28tau_RV.jpg (85.55 KiB) Viewed 3147 times

28tau_VtoR.jpg
28tau_VtoR.jpg (84.98 KiB) Viewed 3147 times

28tau_EW.jpg
28tau_EW.jpg (77.47 KiB) Viewed 3147 times


Ernst
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Re: 28 Tau ARAS monitoring

Postby James Foster » Thu Nov 10, 2016 4:12 am

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
James R. Foster
Lhires III (2400 & 1800 ln/mm Grat) Spectroscope,
LISA Visual & IR Kit Spectroscope,
Alpy 600, and Star Analyzer 200
James Foster
 
Posts: 242
Joined: Sun Jan 24, 2016 7:14 am

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