Delicate bubble of expelled material around the cool red star U Antliae

This ALMA image reveals much finer structure in the U Antliae shell than has previously been possible. Around 2700 years ago, U Antliae went through a short period of rapid mass loss. During this period of only a few hundred years, the material making up the shell seen in the new ALMA data was ejected at high speed. Examination of this shell in further detail also shows some evidence of thin, wispy clouds known as filamentary substructures.

Credit:

ALMA (ESO/NAOJ/NRAO)/F. Kerschbaum

About the Image

Id:eso1730a
Type:Observation
Release date:20 September 2017, 12:00
Related releases:eso1730
Size:2000 x 2000 px

About the Object

Name:U Antliae
Type:Milky Way : Star : Type : Variable
Constellation:Antlia
Category:Stars

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Coordinates

Position (RA):10 35 12.87
Position (Dec):-39° 33' 44.99"
Field of view:2.18 x 2.18 arcminutes
Orientation:North is 0.5° right of vertical

Colours & filters

BandWavelengthTelescope
Millimeter
230 GHz
1.3 mmAtacama Large Millimeter/submillimeter Array
Band 6

 

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