J/A+A/531/A25 Linear and circular polarisation spectra of 2 stars (Cox+, 2011)
Linear and circular polarisation of diffuse interstellar bands.
Cox N.L.J., Ehrenfreund P., Foing B.H., d'Hendecourt L., Salama F.,
Sarre P.J.
<Astron. Astrophys. 531, A25 (2011)>
=2011A&A...531A..25C 2011A&A...531A..25C
ADC_Keywords: Interstellar medium ; Polarization ; Spectroscopy
Keywords: astrochemistry - polarisation - dust, extinction -
ISM: lines and bands - ISM: molecules
Abstract:
The identification of the carriers of diffuse interstellar bands
(DIBs) remains one of the long-standing mysteries in astronomy. The
detection of a polarisation signal in a DIB profile can be used to
distinguish between a dust or gas-phase carrier. The polarisation
profile can give additional information on the grain or molecular
properties of the absorber.
The aim is to measure the polarisation efficiency of the carriers of
the diffuse interstellar bands.
Description:
Linear and circular polarisation and total intensity spectra obtained
with ESPaDOnS at the CFHT for the two lines-of-sight towards HD197770
and HD194279. For each line-of-sight we give the average (globally
normalised) Stokes I, Q, U, and V spectra. The spectra cover the
wavelength range from 376nm to 1000nm.
Objects:
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RA (2000) DE Designation(s)
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20 43 13.7 +57 06 50 HD197770 = V* V379 Cep
20 23 18.2 +40 45 33 HD194279 = EM* MWC 634
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
hd194279.dat 65 249601 Stokes I, Q, U, V spectra of HD194279
hd197770.dat 65 249601 Stokes I, Q, U, V spectra of HD197770
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See also:
II/149 : Diffuse Interstellar Band Measurements (Snow+ 1977)
J/MNRAS/358/563 : Diffuse Interstellar Bands in 49 stars (Megier+, 2005)
Byte-by-byte Description of file: hd194279.dat hd197770.dat
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Bytes Format Units Label Explanations
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5- 13 F9.4 nm lambda [376/1000] Wavelength
16- 26 F11.8 --- I Stokes parameter I
29- 39 F11.8 --- Q Stokes parameter Q
42- 52 F11.8 --- U Stokes parameter U
55- 65 F11.8 --- V Stokes parameter V
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Acknowledgements:
Nick Cox, nick (at)ster.kuleuven.be
(End) Patricia Vannier [CDS] 27-May-2011