Price-Whelan 1

Price-Whelan 1
Observation data (J2000 epoch)
Right ascension11h 55m 12s[1]
Declination−29° 23′ 00″[1]
Distance94200[1] (28.9±0.1 kpc[1])
Physical characteristics
Mass1200[1] M☉
Estimated age130±6 Myr[1]
Associations
ConstellationHydra
See also: Open cluster, List of open clusters

Price-Whelan 1 (PW 1) is a young stellar association or disrupting star cluster with low metallicity and extragalactic origin, more specifically the leading arm of the Magellanic gas stream originating in the Magellanic Clouds. Price-Whelan 1 was discovered by Adrian Price-Whelan using Gaia data and additional cluster members were identified using DECam data. The star cluster contains less than a thousand stars. The existence of Price-Whelan 1 suggests that the stream of gas extending from the Magellanic Clouds to our Milky Way is about half as far from the Milky Way as previously thought.[2][1]

  1. ^ a b c d e f g Price-Whelan, Adrian M.; Nidever, David L.; Choi, Yumi; Schlafly, Edward F.; Morton, Timothy; Koposov, Sergey E.; Belokurov, Vasily (2019). "Discovery of a Disrupting Open Cluster Far into the Milky Way Halo: A Recent Star Formation Event in the Leading Arm of the Magellanic Stream?". The Astrophysical Journal. 887 (1): 19. arXiv:1811.05991. Bibcode:2019ApJ...887...19P. doi:10.3847/1538-4357/ab4bdd.
  2. ^ "Discovery of a new star cluster: Price-Whelan 1". Retrieved 9 January 2020.