The Geometric Distance and Proper Motion of the Triangulum Galaxy (M33)
Top Cited Papers
- 4 March 2005
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 307 (5714) , 1440-1443
- https://doi.org/10.1126/science.1108342
Abstract
We measured the angular rotation and proper motion of the Triangulum Galaxy (M33) with the Very Long Baseline Array by observing two H 2 O masers on opposite sides of the galaxy. By comparing the angular rotation rate with the inclination and rotation speed, we obtained a distance of 730 ± 168 kiloparsecs. This distance is consistent with the most recent Cepheid distance measurement. M33 is moving with a velocity of 190 ± 59 kilometers per second relative to the Milky Way. These measurements promise a method to determine dynamical models for the Local Group and the mass and dark-matter halos of M31, M33, and the Milky Way.Keywords
All Related Versions
This publication has 22 references indexed in Scilit:
- The IC 133 Water Vapor Maser in the Galaxy M33: A Geometric DistanceThe Astrophysical Journal, 2004
- Determination of the Distance to M33 Based on Single‐EpochI‐BandHubble Space TelescopeObservations of CepheidsThe Astrophysical Journal, 2002
- The Optical Gravitational Lensing Experiment: Short Distance Scaleto the Large Magellanic CloudThe Astrophysical Journal, 1998
- Proper motion of the Large Magellanic Cloud and the mass of the galaxy. 1: Observational resultsThe Astronomical Journal, 1994
- The angular structure and intraday variability of a water vapor maser in IC 10The Astrophysical Journal, 1994
- Microarcsecond proper motions of extragalactic water vapor masers in M33The Astrophysical Journal, 1993
- First images of water vapor masers in the galaxy M33The Astrophysical Journal, 1990
- Radial velocities for outlying satellites and their implications for the mass of the GalaxyThe Astrophysical Journal, 1978
- A spiral nebula as a stellar system: Messier 33.The Astrophysical Journal, 1926
- Investigations on proper motion. X. Internal motion in the spiral nebula Messier 33, NGC 598.The Astrophysical Journal, 1923