Really hot stars

This unique image shows AB7, one of the highest excitation nebulae in the Magellanic Clouds (MCs), two satellite galaxies of our own Milky Way. AB7 is a binary star, consisting of one WR-star — highly evolved massive star - and a mid-age massive companion of spectral type O. These exceptional stars have very strong stellar winds: they continuously eject energetic particles — like the "solar wind" from the Sun — but some 10 to 1,000 million times more intensely than our star! These powerful winds exert an enormous pressure on the surrounding interstellar material and forcefully shape those clouds into "bubbles", well visible in the photos by their blue colour. AB7 is particularly remarkable: the associated huge nebula and HeII region indicate that this star is one of the, if not the, hottest WR-star known so far, with a surface temperature in excess of 120,000 degrees ! Just outside this nebula, a small network of green filaments is visible — they are the remains of another supernova explosion.

Oikeudet:

ESO

Kuvasta

Tunnistus:eso0310a
Tyyppi:Havainto
Julkaisupäivä:9. huhtikuuta 2003
Vastaavat julkaisut:eso0310
Koko:4961 x 4956 px

Kohteesta

Nimi:LHA 115-N 76A
Tyyppi:Local Universe : Nebula
Local Universe : Star : Grouping : Binary
Etäisyys:180000 valovuotta
Constellation:Tucana
Kategoria:Nebulae

Kuvaformaatit

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3,2 MB
Kokoruudun JPEG
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Koordinaatit

Position (RA):1 3 48.92
Position (Dec):-72° 3' 51.42"
Field of view:6.57 x 6.57 arcminutes
Suuntaus:Pohjoinen on 0.1° vasen pystysuuntaan nähden

Värit ja suotimet

KaistaTeleskooppi
Optinen
HeIII
Very Large Telescope
FORS1
Optinen
OIII
Very Large Telescope
FORS1
Optinen
H-I
Very Large Telescope
FORS1