471 citations · 4.4k across the 64 of their papers we have counts for
9 papers · 2 filters
A movie of a star: multi-epoch VLBA imaging of the SiO masers towards the Mira variable TX Cam
P. J. Diamond, A. J. Kemball
We describe an observing campaign using the Very Long Baseline Array (VLBA) to monitor the time-evolution of the v=1, J=1-0 SiO maser emission towards the Mira variable TX Cam. The…
The Most Detailed Picture Yet of an Embedded High-mass YSO
L. J. Greenhill, M. J. Reid, C. J. Chandler +2
High-mass star formation is not well understood chiefly because examples are deeply embedded, relatively distant, and crowded with sources of emission. Using VLA and VLBA observati…
A search for extragalactic H2O maser emission towards IRAS galaxies II - Discovery of an H2O maser in the Seyfert 1 galaxy NGC 4051
Yoshiaki Hagiwara, Philip J Diamond, Makoto Miyoshi +2
Water vapor maser emission in the 6_{16}-5_{23} transition towards the narrow-line Seyfert 1 (NLS1) galaxy NGC 4051 has been discovered during an ongoing single-dish extragalactic…
Astrometry of the OH masers of 4 Mira stars
Wouter Vlemmings, Huib Jan van Langevelde, Phil Diamond
The OH main line masers in circumstellar shells were observed with astrometric VLBI in order to accurately determine the position of the star, as well as its motion, including the…
VLBI astrometry of circumstellar OH masers; proper motions and parallaxes of four AGB stars
W. H. T. Vlemmings, H. J. van Langevelde, P. J. Diamond +2
The main-line OH masers around 4 AGB stars have been observed with the NRAO Very Long Baseline Array (VLBA) at 8 epochs over a period of 2.5 years. Using a phase referencing techni…
VLBI Imaging of Luminous Infrared Galaxies: AGN Cores in Mrk231, UGC 5101 & NGC 7469
Carol J. Lonsdale, Colin J. Lonsdale, Harding E. Smith +1
We report 18cm VLBI continuum imaging observations at 5 mas resolution for UGC 5101, NGC 7469, and Mrk 231, all part of a sample of Luminous Infrared Galaxies which have been shown…
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…
Continuum and spectral line observations of the OH Megamaser galaxy Arp 220
Emmanouel Rovilos, Philip J. Diamond, Colin J. Lonsdale +2
We present MERLIN observations of the continuum (both 1.6 and 5 GHz) and OH maser emission towards Arp220. the correct spatial configuration of the various componnents of the galax…
The 3-D kinematics of water masers around the semiregular variable RT Virginis
Hiroshi Imai, Katsunori M. Shibata, Kevin B. Marvel +6
We report observations of water masers around the semiregular variable RT Virginis (RT Vir), which have been made with the Very Long Baseline Array (VLBA) of the National Radio Ast…