A dark filament in scattered light

Eso_eso0806a_500

eso_eso0806a March 7th, 2008

Credit: ESO

Part of a filament in the Corona Australis molecular cloud. The image is a composite of J-, H-, and K-band near-infrared observations that were made with the SOFI instrument on ESO's NTT telescope in August 2006. The observations were made to test, how easily the scattered light can be observed and how good it is as a tracer of cloud structure. The J-, H-, and K-band intensities are coded with blue, green, and red colours. The gradual saturation of the near-infrared bands is visible as a change of colour. In diffuse regions the shorter wavelength J-band is strong and the colour is bluish. When the J-band saturates the colour changes first to green and finally, in the centre of the filament, the red colour corresponding to the K-band becomes the strongest. In the most saturated regions the surface brightness data can only be used to derive a lower limit for the total amount of dust on the line of sight.

Image Source: https://www.eso.org/public/images/eso0806a/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Document
Object Name
Corona Australis NGC 6726
Subject - Milky Way
Nebula » Type » Star Formation
Nebula » Appearance » Reflection
Eso_eso0806a_128
 

Position Details

Position (ICRS)
RA = 19h 0m 48.6s
DEC = -36° 51’ 11.9”
Orientation
North is 110.0° CCW
Field of View
8.3 x 5.0 arcminutes
Constellation
Corona Australis

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_blue New Technology Telescope (SOFI) Infrared (J) -
Arrow_left_green New Technology Telescope (SOFI) Infrared (H) -
Arrow_left_red New Technology Telescope (SOFI) Infrared (K) -
Eso_eso0806a_1280
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ID
eso0806a
Subject Category
B.4.1.2   B.4.2.2  
Subject Name
Corona Australis, NGC 6726
Credits
ESO
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/eso0806a/
Type
Document
Image Quality
Distance Notes
Facility
New Technology Telescope, New Technology Telescope, New Technology Telescope
Instrument
SOFI, SOFI, SOFI
Color Assignment
Blue, Green, Red
Band
Infrared, Infrared, Infrared
Bandpass
J, H, K
Central Wavelength
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
285.202423652, -36.8533023088
Reference Dimension
1727.0, 1049.0
Reference Pixel
545.565285342, 513.776121682
Scale
-8.00240774506e-05, 8.00240774506e-05
Rotation
109.99239152975011
Coordinate System Projection:
TAN
Quality
Full
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
eso0806a
Metadata Date
2009-01-07T15:26:55+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.