OPTICAL PROPER MOTION MEASUREMENTS OF THE M87 JET: NEW RESULTS FROM THE HUBBLE SPACE TELESCOPE
| dc.contributor.author | Meyer, Eileen T. | |
| dc.contributor.author | Sparks, W. B. | |
| dc.contributor.author | Biretta, J. A. | |
| dc.contributor.author | Anderson, Jay | |
| dc.contributor.author | Sohn, Sangmo Tony | |
| dc.contributor.author | Marel, Roeland P. van der | |
| dc.contributor.author | Norman, Colin | |
| dc.contributor.author | Nakamura, Masanori | |
| dc.date.accessioned | 2020-08-24T16:42:05Z | |
| dc.date.available | 2020-08-24T16:42:05Z | |
| dc.date.issued | 2013-08-22 | |
| dc.description.abstract | We report new results from a Hubble Space Telescope archival program to study proper motions in the optical jet of the nearby radio galaxy M87. Using over 13 yr of archival imaging, we reach accuracies below 0.1c in measuring the apparent velocities of individual knots in the jet. We confirm previous findings of speeds up to 4.5c in the inner 6'' of the jet, and report new speeds for optical components in the outer part of the jet. We find evidence of significant motion transverse to the jet axis on the order of 0.6c in the inner jet features, and superluminal velocities parallel and transverse to the jet in the outer knot components, with an apparent ordering of velocity vectors possibly consistent with a helical jet pattern. Previous results suggested a global deceleration over the length of the jet in the form of decreasing maximum speeds of knot components from HST-1 outward, but our results suggest that superluminal speeds persist out to knot C, with large differentials in very nearby features all along the jet. We find significant apparent accelerations in directions parallel and transverse to the jet axis, along with evidence for stationary features in knots D, E, and I. These results are expected to place important constraints on detailed models of kiloparsec-scale relativistic jets. | en_US |
| dc.description.sponsorship | Support for this work was provided by NASA through a grant for archival program 12635 from the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy (AURA), Inc., under NASA contract NAS5-26555. | en_US |
| dc.description.uri | https://iopscience.iop.org/article/10.1088/2041-8205/774/2/L21 | en_US |
| dc.format.extent | 8 pages | en_US |
| dc.genre | journal articles preprints | en_US |
| dc.identifier | doi:10.13016/m2a1fg-javj | |
| dc.identifier.citation | Eileen T. Meyer et al., OPTICAL PROPER MOTION MEASUREMENTS OF THE M87 JET: NEW RESULTS FROM THE HUBBLE SPACE TELESCOPE, The Astrophysical Journal Letters, Volume 774, Number 2, doi: 10.1088/2041-8205/774/2/l21 | en_US |
| dc.identifier.uri | 10.1088/2041-8205/774/2/l21 | |
| dc.identifier.uri | http://hdl.handle.net/11603/19496 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | IOP | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Physics Department Collection | |
| dc.relation.ispartof | UMBC Joint Center for Earth Systems Technology (JCET) | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | © 2013. The American Astronomical Society. All rights reserved. | |
| dc.title | OPTICAL PROPER MOTION MEASUREMENTS OF THE M87 JET: NEW RESULTS FROM THE HUBBLE SPACE TELESCOPE | en_US |
| dc.type | Text | en_US |