VLBI observations of 21 extragalactic radio sources - Search for superluminal sources in the mid-southern hemisphere

被引：10
|
作者：
Hong, XY
Venturi, T
Wan, TS
Jiang, DR
Shen, ZQ
Liu, X
Nicolson, G
Umana, G
机构：
[1] CNR, Ist Radioastron, I-40129 Bologna, Italy
[2] Chinese Acad Sci, Shanghai Astron Observ, Beijing, Peoples R China
[3] Chinese Acad Sci, Urumqi Astron Stn, Beijing, Peoples R China
[4] Hartebeesthoek Radio Astron Observ, Krugersdorp, South Africa
[5] CNR, Ist Radioastron, Noto, Italy
来源：
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES | 1999年 / 134卷 / 02期
关键词：
radio continuum : galaxies; galaxies : active; quasars : general;
D O I：
10.1051/aas:1999436
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the results of VLBI observations of 21 extragalactic radio sources carried out with an ad-hoc VLBI array including Shanghai, Urumqi: Noto, and Hartebeesthoek radio telescopes. Eleven sources are imaged, three of them for the first time with VLBI. Correlated flux densities of the remaining ten sources are given. From comparison with data taken at earlier epochs, the apparent superluminal motion is confirmed in four sources (0420-014. 0552+398, 1334-127 and 2345-167) and two more superluminal candidates (1504-166 and 2243-123) are found. The physical parameters of the four superluminal sources are derived.
引用
收藏
页码：201 / 210
页数：10
相关论文
共 50 条
  • [41] VLBI OBSERVATIONS OF COMPACT RADIO-SOURCES AT 609 MEGAHERTZ
    WILKINSON, PN
    READHEAD, ACS
    ANDERSON, B
    PURCELL, GH
    ASTROPHYSICAL JOURNAL, 1979, 232 (02): : 365 - 381
  • [42] Accurate astrometry of 22 southern hemisphere radio sources
    Fey, AL
    Ojha, R
    Jauncey, DL
    Johnston, KJ
    Reynolds, JE
    Lovell, JEJ
    Tzioumis, AK
    Quick, JFH
    Nicolson, GD
    Ellingsen, SP
    McCulloch, PM
    Koyama, Y
    ASTRONOMICAL JOURNAL, 2004, 127 (03): : 1791 - 1795
  • [43] SEARCH FOR EXTRAGALACTIC RADIO-SOURCES WITH LARGE ROTATION MEASURE
    AIZU, K
    INOUE, M
    TABARA, H
    KATO, T
    IAU SYMPOSIA, 1990, (140): : 472 - 472
  • [44] SURVEY OF A COMPLETE SAMPLE OF SOUTHERN EXTRAGALACTIC RADIO-SOURCES
    TORNIKOSKI, M
    VALTAOJA, E
    TERASRANTA, H
    LAINELA, M
    BRAMWELL, D
    BOTTI, LCL
    ASTRONOMICAL JOURNAL, 1993, 105 (05): : 1680 - 1689
  • [45] Determination of optical positions for 22 southern extragalactic radio sources
    Tang, ZH
    Wang, SH
    Jin, WJ
    ASTRONOMICAL JOURNAL, 2002, 123 (01): : 125 - 131
  • [46] GMRT observations of extragalactic radio sources with steeply inverted spectra
    Mhaskey, Mukul
    Gopal-Krishna
    Dabhade, Pratik
    Paul, Surajit
    Salunkhe, Sameer
    Sirothia, S. K.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2019, 485 (02) : 2447 - 2456
  • [47] Forecasting the Contribution of Polarized Extragalactic Radio Sources in CMB Observations
    Puglisi, G.
    Galluzzi, V.
    Bonavera, L.
    Gonzalez-Nuevo, J.
    Lapi, A.
    Massardi, M.
    Perrotta, F.
    Baccigalupi, C.
    Celotti, A.
    Danese, L.
    ASTROPHYSICAL JOURNAL, 2018, 858 (02):
  • [48] FLICKER OF SOUTHERN EXTRAGALACTIC RADIO-SOURCES AT 1.42 GHZ
    ROMERO, GE
    BENAGLIA, P
    COMBI, JA
    ASTRONOMY & ASTROPHYSICS, 1995, 301 (01) : 33 - 40
  • [49] A NORTHERN 2-JY SAMPLE OF COMPACT EXTRAGALACTIC RADIO-SOURCES SUITABLE FOR MILLIMETER AND SPACE VLBI OBSERVATIONS
    VALTAOJA, E
    LAHTEENMAKI, A
    TERASRANTA, H
    ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1992, 95 (01): : 73 - 85
  • [50] VLBI observations of southern hemisphere ICRF sources. II. Astrometric suitability based on intrinsic structure
    Ojha, R
    Fey, AL
    Charlot, P
    Jauncey, DL
    Johnston, KJ
    Reynolds, JE
    Tzioumis, AK
    Quick, JFH
    Nicolson, GD
    Ellingsen, SP
    McCulloch, PM
    Koyama, Y
    ASTRONOMICAL JOURNAL, 2005, 130 (06): : 2529 - 2540
12345