K-band image of the peculiar star "Frosty Leo"

Frosty Leo is a magnitude 11 (post-AGB) star surrounded by an envelope of gas, dust, and large amounts of ice (hence the name). The associated nebula is of "butterfly" shape (bipolar morphology) and it is one of the best known examples of the brief transitional phase between two late evolutionary stages, asymptotic giant branch (AGB) and the subsequent planetary nebulae (PNe). For a three-solar-mass object like this one, this phase is believed to last only a few thousand years, the wink of an eye in the life of the star. Hence, objects like this one are very rare and Frosty Leo is one of the nearest and brightest among them. This image shows a 5 x 5 arcsec 2 K-band image of the peculiar star known as "Frosty Leo" obtained in 0.7 arcsec seeing. Although the object is comparatively bright (visual magnitude 11), it is a difficult AO target because of its extension of about 3 arcsec at visible wavelengths. The corrected image quality is about FWHM 0.1 arcsec.

Credit:

ESO

Over de afbeelding

Id:eso0313j
Type:Observatie
Publicatiedatum:13 mei 2003
Gerelateerde berichten:eso0313
Grootte:1228 x 1017 px

Over het object

Naam:Frosty Leo
Type:Milky Way : Nebula : Type : Planetary
Milky Way : Star
Afstand:10000 lichtjaren
Categorie:Nebulae

Afbeeldingstypen

Grote JPEG
133,5 KB

Achtergrond

1024x768
162,3 KB
1280x1024
245,7 KB
1600x1200
309,6 KB
1920x1200
325,6 KB
2048x1536
423,9 KB

Kleuren & filters

BandGolflengteTelescoop
Infrarood
K
2.2 μmVery Large Telescope Interferometer
AMBER