A dark filament in scattered light

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.

Të drejtat:

ESO

Rreth fotografisë

Id:eso0806a
Tipi:Vëzhgim
Data e Publikimit:07 Mars 2008
Publikime të ngjashme:eso0806
Përmasat:1727 x 1049 px

Rreth objektit

Emri:Corona Australis, NGC 6726
Tipi:Milky Way : Nebula : Type : Star Formation
Milky Way : Nebula : Appearance : Reflection
Distanca:400 vite dritë
Constellation:Corona Australis
Kategori:Nebulae

Formate Fotografish

JPEG i madh
1,5 MB

Wallpaper

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1920x1200
2,0 MB
2048x1536
2,3 MB

Koordinatat

Position (RA):19 0 48.58
Position (Dec):-36° 51' 11.89"
Field of view:8.29 x 5.04 arcminutes
Orientimi:Veriu është 110.0° majtas vertikales

Ngjyra & filtera

BandaTeleskopi
Infra të kuqe
J
New Technology Telescope
SOFI
Infra të kuqe
H
New Technology Telescope
SOFI
Infra të kuqe
K
New Technology Telescope
SOFI