Beasts of the Southern Wild
Discovery of a large number of ultra-faint satellites in the vicinity of the Magellanic Clouds

The PDF of the discovery paper is (freely) available on the arxiv.
 

Night Sky, the ATs and the Magellanic Family

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Credit: V. Belokurov, S. Koposov (IoA, Cambridge). Photo: Y. Beletsky (Carnegie Observatories)
Caption: The Magellanic Clouds and the Auxiliary Telescopes at the Paranal Observatory in the Atacama Desert in Chile. Only 6 of the 9 newly discovered satellites are present in this image. The other three are just outside the field of view. The insets show images of the three most visible objects (Eridanus 1, Horologium 1 and Pictoris 1) and are 13x13 arcminutes on the sky (or 3000x3000 DECam pixels).
 

LMC, SMC, the HI stream and the new satellites

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Credit: V. Belokurov, S. Koposov (IoA, Cambridge). HI image: M. Putman (Columbia)
Caption: The Magellanic Clouds and the stream of neutral hydrogen. The insets show the image of the largest satellite discovered (Eridanus 2) as well as the smallest one (Indus 1). The insets are 13x13 arcminutes on the sky (or 3000x3000 DECam pixels) for Eridanus 2 and 6.5x6.5 arcminutes (or 1500x1500 DECam pixels) for Indus 1.
 

Eridanus 2, Horologium 1 and Pictoris 1


Eridanus 2
Horologium 1
Pictoris 1
Credit: V. Belokurov, S. Koposov (IoA, Cambridge)
Caption: Images of the three most visible satellites. These enhanced images are 13x13 arcminutes on the sky (or 3000x3000 DECam pixels).
 

All-sky view of the Galactic satellite system

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Credit: S. Koposov, V. Belokurov (IoA, Cambridge). Background: 2MASS
Caption: Distribution of the Galactic satellites on the sky. The underlying background image is the Infrared Map produced by the 2MASS survey