Lithium-6 in HD 82943

Eso_eso0118b_1024

eso_eso0118b May 9th, 2001

Credit: ESO

This chart represents the spectrum of HD 82943, showing the region around the Lithium absorption line. The general shape of this spectral line is caused by Lithium-7 atoms in the atmosphere of the star, while the presence of Lithium-6 causes a certain asymmetry. Model computations have been used to calculate the amount of the two Lithium isotopes; the two fully drawn curves correspond to 6 Li/ 7 Li = 0.12 (red) and no Lithium-6 (0.00; blue), respectively. The difference (O-C = Observed - Calculated) is shown below and demonstrates the very good fit for an isotopic ratio of 0.12 (red dots). Technical information: this image shows the spectrum of the V = 6.5 mag star HD 82943, as obtained on June 7, 2000, with the UVES spectrograph at the 8.2-m VLT KUEYEN telescope. It is based on three exposures made with Image Slicer 3 in Director's Discretionary Time in Service Mode, and each lasting 120 sec. The spectral resolution is 110,000 and the final S/N-ratio is about 500.

Provider: European Southern Observatory

Image Source: https://www.eso.org/public/images/eso0118b/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

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Image Details

Image Type
Observation
Object Name
HD 82943
Subject - Milky Way
Star > Circumstellar Material > Planetary System

Color Mapping

  Telescope Spectral Band Wavelength
Pseudocolor VLT (UVES) Optical (R) 670.0 nm
Spectrum_base
Pseudocolor
Eso_eso0118b_1280
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ID
eso0118b
Subject Category
B.3.7.1  
Subject Name
HD 82943
Credits
ESO
Release Date
2001-05-09T00:00:00
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/eso0118b/
Type
Observation
Image Quality
Distance Notes
Facility
Very Large Telescope
Instrument
UVES
Color Assignment
Pseudocolor
Band
Optical
Bandpass
R
Central Wavelength
670
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
Equinox
Reference Value
Reference Dimension
2775.0, 2706.0
Reference Pixel
Scale
Rotation
Coordinate System Projection:
Quality
FITS Header
Notes
Creator (Curator)
European Southern Observatory
URL
http://www.eso.org/
Name
Email
Telephone
Address
Karl-Schwarzschild-Strasse 2
City
Garching bei München
State/Province
Postal Code
D-85748
Country
Germany
Rights
Creative Commons Attribution 4.0 International License
Publisher
European Southern Observatory
Publisher ID
eso
Resource ID
eso0118b
Metadata Date
2010-02-26T13:02:05+01:00
Metadata Version
1.1
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Detailed color mapping information coming soon...

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There is no distance meta data in this image.

 

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