Compact Symmetric Objects. III. Evolution of the High-luminosity Branch and a Possible Connection with Tidal Disruption Events

Autor: A. C. S Readhead, V. Ravi, R. D. Blandford, A. G. Sullivan, J. Somalwar, M. C. Begelman, M. Birkinshaw, I. Liodakis, M. L. Lister, T. J. Pearson, G. B. Taylor, P. N. Wilkinson, N. Globus, S. Kiehlmann, C. R. Lawrence, D. Murphy, S. O’Neill, V. Pavlidou, E. Sheldahl, A. Siemiginowska, K. Tassis

Publikováno v: The Astrophysical Journal, Vol 961, Iss 2, p 242 (2024)

We use a sample of 54 compact symmetric objects (CSOs) to confirm that there are two unrelated CSO classes: an edge-dimmed, low-luminosity class (CSO 1), and an edge-brightened, high-luminosity class (CSO 2). Using blind tests, we show that CSO 2s co

Externí odkaz: https://doaj.org/article/02064a117a3345868f790e61f53e83cf

Compact Symmetric Objects. II. Confirmation of a Distinct Population of High-luminosity Jetted Active Galaxies

Autor: S. Kiehlmann, A. C. S. Readhead, S. O’Neill, P. N. Wilkinson, M. L. Lister, I. Liodakis, S. Bruzewski, V. Pavlidou, T. J. Pearson, E. Sheldahl, A. Siemiginowska, K. Tassis, G. B. Taylor

Publikováno v: The Astrophysical Journal, Vol 961, Iss 2, p 241 (2024)

Compact symmetric objects (CSOs) are compact (99%) of CSO 2s do not evolve into larger-scale radio sources. These CSO 2s belong to a distinct population of jetted AGN, which should be characterized as “short-lived,” as opposed to “young,” com

Externí odkaz: https://doaj.org/article/9ec3739c56de4661abd0569f7e47dcff

A Combined Radio Multi-Survey Catalog of Fermi Unassociated Sources

Autor: S. Bruzewski, F. K. Schinzel, G. B. Taylor

Publikováno v: The Astrophysical Journal, Vol 943, Iss 1, p 51 (2023)

Approximately one-third of existing γ -ray sources identified by the Fermi Gamma-Ray Space Telescope are considered to be unassociated, with no known counterpart at other frequencies/wavelengths. These sources have been the subject of intense scruti

Externí odkaz: https://doaj.org/article/62d9ff41636e42cda98631ab1d7690d8

All‐Sky Tracking of Sporadic E Field‐Aligned Irregularities as a Novel Probe of Thermospheric Winds

Autor: J. F. Helmboldt, G. B. Taylor

Publikováno v: Earth and Space Science, Vol 7, Iss 4, Pp n/a-n/a (2020)

Abstract This paper presents the results of an analysis of a unique observing campaign that tracks groups of irregularities associated with sporadic E ( Es) via their coherent backscattering of a very high frequency transmitter of opportunity (an ana

Externí odkaz: https://doaj.org/article/5968799546aa44d58386d2a0f342154a

New Tests of Milli-lensing in the Blazar PKS 1413 + 135

Autor: A. L. Peirson, I. Liodakis, A. C. S Readhead, M. L. Lister, E. S. Perlman, M. F. Aller, R. D. Blandford, K. J. B. Grainge, D. A. Green, M. A. Gurwell, M. W. Hodges, T. Hovatta, S. Kiehlmann, A. Lähteenmäki, W. Max-Moerbeck, T. Mcaloone, S. O’Neill, V. Pavlidou, T. J. Pearson, V. Ravi, R. A. Reeves, P. F. Scott, G. B. Taylor, D. J. Titterington, M. Tornikoski, H. K. Vedantham, P. N. Wilkinson, D. T. Williams, J. A. Zensus

Publikováno v: Peirson, A L, Liodakis, I, Readhead, A C S, Lister, M L, Perlman, E S, Aller, M F, Blandford, R D, Grainge, K J B, Green, D A, Gurwell, M A, Hodges, M W, Hovatta, T, Kiehlmann, S, Lähteenmäki, A, Max-Moerbeck, W, Mcaloone, T, O’Neill, S, Pavlidou, V, Pearson, T J, Ravi, V, Reeves, R A, Scott, P F, Taylor, G B, Titterington, D J, Tornikoski, M, Vedantham, H K, Wilkinson, P N, Williams, D T & Zensus, J A 2022, ' New Tests of Milli-lensing in the Blazar PKS 1413 + 135 ', The Astrophysical Journal, vol. 927, no. 1, 24 . https://doi.org/10.3847/1538-4357/ac469e

Symmetric Achromatic Variability (SAV) is a rare form of radio variability in blazars that has been attributed to gravitational millilensing by a ~$10^2 - 10^5$ $M_\odot$ mass condensate. Four SAVs have been identified between 1980 and 2020 in the lo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e95f1762a34d184bed1ec77fea6a45bb
https://resolver.caltech.edu/CaltechAUTHORS:20220302-596599132