33 citations · 38 across the 3 of their papers we have counts for
6 papers · 1 filter
Low-luminosity Extragalactic Water Masers toward M82, M51, and NGC4051
Yoshiaki Hagiwara
Sub-arcsecond observations using the Very Large Array (VLA) are presented for low-luminosity water maser in M82, M51, and NGC4051. New maser features have been detected within the…
Distance of W3(OH) by VLBI annual parallax measurement
K. Hachisuka, A. Brunthaler, Y. Hagiwara +4
The most powerful tool for measuring distances within our Galaxy is the annual parallax. We carried out phase-referencing VLBI observations of HO masers in the star forming r…
H2O megamasers: Accretion disks, jet interaction, outflows or massive star formation?
C. Henkel, J. A. Braatz, A. Tarchi +5
The 25 years following the serendipitous discovery of megamasers have seen tremendous progress in the study of luminous extragalactic HO emission. Single-dish monitoring and hi…
VLBI imaging of OH absorption: The puzzle of the nuclear region of NGC 3079
Y. Hagiwara, H. -R. Kloeckner, W. Baan
Broad hydroxyl (OH) absorption-lines in the 1667 MHz and 1665 MHz transition towards the central region of NGC 3079 have been observed at high resolution with the European VLBI Net…
Location of H2O maser in the double-nuclei system of NGC6240
Yoshiaki Hagiwara, Philip J. Diamond, Makoto Miyoshi
We performed VLA observations of the 22 GHz H2O maser emission in the merging galaxy NGC6240, which hosts the well-known double active nuclei. In a previous paper, we reported on t…
A Flaring Megamaser in Mrk 348
A. B. Peck, H. Falcke, C. Henkel +4
We report new observations of the H2O megamaser in the Seyfert 2 galaxy Mrk 348. Following our initial detection in 2000 March using the Effelsberg 100 m telescope, re-analysis of…