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9.11. Global VLBI observations of the central region in NGC 3079

Published online by Cambridge University Press:  25 May 2016

Satoko Satoh ,
M. Inoue ,
K.M. Shibata ,
S. Kameno ,
V. Migenes ,
N. Nakai  and
P.J. Diamond
Satoko Satoh
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, 181 JAPAN
M. Inoue
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, 181 JAPAN
K.M. Shibata
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, 181 JAPAN
S. Kameno
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, 181 JAPAN
V. Migenes
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo, 181 JAPAN
N. Nakai
Affiliation:
Nobeyama Radio Observatory, Minamimaki, Minamisaku, Nagano 384-13 JAPAN
P.J. Diamond
Affiliation:
National Radio Astronomical Observatory, NM, PO Box O Socorro, NM 87801, USA

Extract

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NGC 3079 has very luminous water megamaser from the nucleus, the peak of the spectrum being blueshifted by 180 km s−1 from the systemic velocity of the galaxy (Vsys = 1131 km s−1) (Henkel et al. 1984, Haschick & Baan 1985). Core-jet like continuum structure is also found in the nuclear region (Irwin & Seaquist 1988). No velocity drift for main features of water maser (VLSR = 941–975 km s−1) has been shown (Nakai et al. 1995). However, the drift was recently detected for the maser of 1190 km s−1 (Nakai 1997). HI and OH absorptions are detected in the nucleus (Haschick & Baan 1985, Irwin & Seaquist 1991). Thus this galaxy is very unique object to investigate water masers, continuum structure and absorption features all together with VLBI.

Type
Part III. Black Holes and Central Activity
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 403 - 404
Copyright
Copyright © Kluwer 1998 

References

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