The microarcsecond quasar J1819+3845

Autor: Dennett-Thorpe, J, de Bruyn, AG, Schilizzi, RT, Vogel, SN, Paresce, F, Elvis, MS

Publikováno v: GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONS, 88-89
STARTPAGE=88;ENDPAGE=89;TITLE=GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONS

We present new WSRT observations of the micro-arcsecond quasar J1819+3845. All short term variations are attributed to interstellar scintillation of a source which is at most 30 micro-arcseconds in diameter. The timescale of the modulations changes o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::382be5cbf4fb635d19dc2419575cd4fe
https://research.rug.nl/en/publications/f429b248-1617-4c2b-bb1f-9f054027faaf

A morphological and spectral study of GPS galaxies and quasars

Autor: Schilizzi, RT, Tschager, W, Snellen, IAG, de Bruyn, AG, Miley, GK, Rottgering, HJA, van Langevelde, HJ, Fanti, C, Fanti, R, Hirabayashi, H, Preston, RA, Gurvits, LI

Publikováno v: VSOP RESULTS AND THE FUTURE OF SPACE VLBI, 709-714
STARTPAGE=709;ENDPAGE=714;TITLE=VSOP RESULTS AND THE FUTURE OF SPACE VLBI

We have analysed HALCA and global VLBI data for 2021+614, the first of eleven GPS quasars and galaxies to be observed by HALCA. We show that 2021+614 is a compact symmetric object of overall size similar to 40 pc, and confirm that the speed of separa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::a50428b476e47a09453122106519e87d
https://research.rug.nl/en/publications/5cd0aa5f-7862-4fe9-aca1-8179edb244bf

B2045+265: A new four-image gravitational lens from CLASS

Autor: Fassnacht, CD, Blandford, RD, Cohen, JG, Matthews, K, Pearson, TJ, Readhead, ACS, Womble, DS, Myers, ST, Browne, IWA, Jackson, NJ, Marlow, DR, Wilkinson, PN, Koopmans, LVE, de Bruyn, AG, Schilizzi, RT

Publikováno v: The Astronomical Journal, 117(2), 658-670. IOP PUBLISHING LTD

We have discovered a new gravitational lens in the Cosmic Lens All-Sky Survey (CLASS). The lens B2045+265 is a four-image system with a maximum separation of 1".9. A fifth radio component is detected, but its radio spectrum and its positional coincid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::38450165779c8f3c4de186aa66f125ec
https://research.rug.nl/en/publications/7bdd955f-e38d-4533-bc5c-f11ae1799b78

FAINT RADIO-SOURCES WITH PEAKED SPECTRA .1. VLA OBSERVATIONS OF A NEW SAMPLE WITH INTERMEDIATE FLUX-DENSITIES

Autor: SNELLEN, IAG, ZHANG, M, SCHILIZZI, RT, ROTTGERING, HJA, DEBRUYN, AG, MILEY, GK

Publikováno v: Astronomy & astrophysics, 300(2), 359-365. EDP Sciences

We present 2 and 20 cm observations with the VLA of 25 candidate peaked spectrum radio sources. These data combined with those from earlier surveys have allowed us to construct radio spectra spanning a range of frequency from 0.3 to 15 GHz. Ten of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::ab622b5607ec06f27deb34db63f7ab81
https://research.rug.nl/en/publications/b25b59ec-8212-4a15-ba20-4dddede7f063

THE COMPACT RADIO STRUCTURE OF THE HIGH REDSHIFT QUASARS 0642+449, 1402+044, 1614+051

Autor: GURVITS, LI, KARDASHEV, NS, POPOV, MV, SCHILIZZI, RT, BARTHEL, PD, PAULINYTOTH, IIK, KELLERMANN, KI

Publikováno v: Astronomy & astrophysics, 260(1-2), 82-88. EDP Sciences

In the first stage of an investigation of possible cosmological evolution effects in the compact radio structure of quasars, we have used a combined European and US VLBI network to image the milliarcsec scale morphology of three quasars with redshift

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::167a0f0592afa1999c41fad5c2eefa77
https://research.rug.nl/en/publications/f6a6132a-59f6-406c-9d37-fad109a975f4