True shape of the Boomerang

This Picture of Week shows the Boomerang Nebula, a protoplanetary nebula,  as seen by the Atacama Large Millimeter/submillimeter Array (ALMA). The background purple structure, as seen in visible light with the NASA/ESA Hubble Space Telescope, shows a classic double-lobe shape with a very narrow central region. ALMA’s ability to see the cold molecular gas reveals the nebula’s more elongated shape, in orange.

Since 2003 the nebula, located about 5000 light-years from Earth, has held the record for the coldest known object in the Universe. The nebula is thought to have formed from the envelope of a star in its later stages of life which engulfed a smaller, binary companion. It is possible that this is the cause of the ultra-cold outflows, which are illuminated by the light of the central, dying star.

ALMA looked at the nebula’s central dusty disc and the outflows further out, which span a distance of almost four light-years across the sky. These outflows are even colder than the cosmic microwave background, reaching temperatures below –270 °C. The outflows are also expanding at a speed of 590 000 kilometres per hour.

Link

Припис:

ALMA (ESO/NAOJ/NRAO)/R. Sahai

Про зображення

ID:potw1724a
Тип:Спостереження
Дата релізу [date]:12 червня 2017 р. 06:00
Розмір:1762 x 1762 px

Про об’єкт

Назва:Boomerang Nebula
Тип:Milky Way : Nebula : Type : Planetary
Відстань:5000 світлових років
Constellation:Centaurus
Категорія:Nebulae

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Великий JPEG
689,2 Кб

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Координати

Position (RA):12 44 46.10
Position (Dec):-54° 31' 12.87"
Field of view:0.37 x 0.37 arcminutes
Орієнтація:Північ на 0.1° ліва від вертикалі

Кольори та фільтри

ДіапазонДовжина хвиліТелескоп
Оптичний
V
606 nmHubble Space Telescope
ACS
Радіо
12CO
880 μmAtacama Large Millimeter/submillimeter Array
Band 7
Оптичний
V
606 nmHubble Space Telescope
ACS

 

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