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Title: Dating COINS: Kinematic Ages for Compact Symmetric Objects

Abstract

Here, we present multiepoch VLBA observations of compact symmetric objects (CSOs) from the COINS sample (CSOs Observed In the Northern Sky). These observations allow us to make estimates of, or place limits on, the kinematic ages for those sources with well-identified hot spots. This study significantly increases the number of CSOs with well-determined ages or limits. The age distribution is found to be sharply peaked under 500 yr, suggesting that many CSOs die young, or are episodic in nature, and very few survive to evolve into FR II sources such as Cygnus A. Jet components are found to have higher velocities than hot spots, which is consistent with their movement down cleared channels. We also report on the first detections of significant polarization in two CSOs, J0000+4054 (2.1%) and J1826+1831 (8.8%). In both cases the polarized emission is found in jet components on the stronger side of the center of activity.

Authors:
 [1];  [2];  [3];  [4]
  1. Lycoming College, Williamsport, PA (United States); National Radio Astronomy Observatory, Socorro, NM (United States)
  2. National Radio Astronomy Observatory, Socorro, NM (United States); Kavli Institute of Particle Astrophysics and Cosmology, Menlo Park, CA (United States)
  3. Harvard-Smithsonian Center for Astrophysics, Hilo, HI (United States)
  4. Istituto di Radiastronomia del CNR, Bologna (Italy)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1442479
Report Number(s):
SLAC-PUB-10931
Journal ID: ISSN 0004-637X; TRN: US1900926
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 622; Journal Issue: 1; Journal ID: ISSN 0004-637X
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Gugliucci, N. E., Taylor, G. B., Peck, A. B., and Giroletti, M. Dating COINS: Kinematic Ages for Compact Symmetric Objects. United States: N. p., 2005. Web. doi:10.1086/427934.
Gugliucci, N. E., Taylor, G. B., Peck, A. B., & Giroletti, M. Dating COINS: Kinematic Ages for Compact Symmetric Objects. United States. doi:10.1086/427934.
Gugliucci, N. E., Taylor, G. B., Peck, A. B., and Giroletti, M. Sun . "Dating COINS: Kinematic Ages for Compact Symmetric Objects". United States. doi:10.1086/427934. https://www.osti.gov/servlets/purl/1442479.
@article{osti_1442479,
title = {Dating COINS: Kinematic Ages for Compact Symmetric Objects},
author = {Gugliucci, N. E. and Taylor, G. B. and Peck, A. B. and Giroletti, M.},
abstractNote = {Here, we present multiepoch VLBA observations of compact symmetric objects (CSOs) from the COINS sample (CSOs Observed In the Northern Sky). These observations allow us to make estimates of, or place limits on, the kinematic ages for those sources with well-identified hot spots. This study significantly increases the number of CSOs with well-determined ages or limits. The age distribution is found to be sharply peaked under 500 yr, suggesting that many CSOs die young, or are episodic in nature, and very few survive to evolve into FR II sources such as Cygnus A. Jet components are found to have higher velocities than hot spots, which is consistent with their movement down cleared channels. We also report on the first detections of significant polarization in two CSOs, J0000+4054 (2.1%) and J1826+1831 (8.8%). In both cases the polarized emission is found in jet components on the stronger side of the center of activity.},
doi = {10.1086/427934},
journal = {Astrophysical Journal},
number = 1,
volume = 622,
place = {United States},
year = {2005},
month = {3}
}

Journal Article:
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