THIRD-EPOCH MAGELLANIC CLOUD PROPER MOTIONS. I. HUBBLE SPACE TELESCOPE /WFC3 DATA AND ORBIT IMPLICATIONS

• Published in: The Astrophysical journal Vol. 764; no. 2; pp. 161 - 24
• Main Authors: Kallivayalil, Nitya, van der Marel, Roeland P., Besla, Gurtina, Anderson, Jay, Alcock, Charles
• Format: Journal Article
• Language: English
• Published: United States 20.02.2013
• Subjects: ASTRONOMY; ASTROPHYSICS; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; Control systems; GALACTIC EVOLUTION; Hubble Space Telescope; MAGELLANIC CLOUDS; MILKY WAY; ORBITS; Permissible error; PROPER MOTION; Random errors; RANDOMNESS; SPACE; Streams; Uncertainty; VELOCITY

We present proper motions for the Large and Small Magellanic Clouds (LMC and SMC) based on three epochs of Hubble Space Telescope data, spanning a ~7 yr baseline, and centered on fields with background QSOs. The first two epochs, the subject of past analyses, were obtained with ACS/HRC, and have bee...