Variable stars close to the galactic centre

This image, captured with the VISTA infrared survey telescope, as part of the Variables in the Via Lactea (VVV) ESO public survey, shows the central part of the Milky Way. While normally hidden behind obscuring dust, the infrared capabilities of VISTA allow to study the stars close to the galactic centre.

Within this field of view astronomers detected several ancient stars, of a type known as RR Lyrae. As RR Lyrae stars typically reside in ancient stellar populations over 10 billion years old, this discovery suggests that the bulging centre of the Milky Way likely grew through the merging of primordial star clusters.

Oikeudet:

ESO/VVV Survey/D. Minniti

Kuvasta

Tunnistus:eso1636a
Tyyppi:Havainto
Julkaisupäivä:12. lokakuuta 2016 12:00
Vastaavat julkaisut:eso1636
Koko:15591 x 12672 px

Kohteesta

Nimi:RR Lyr
Tyyppi:Milky Way : Star : Type : Variable
Constellation:Ophiuchus
Kategoria:Stars

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Koordinaatit

Position (RA):17 43 51.55
Position (Dec):-29° 17' 47.78"
Field of view:88.55 x 71.97 arcminutes
Suuntaus:Pohjoinen on 58.6° vasen pystysuuntaan nähden

 

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