2008年11月26日 · Here we present a VLBI map of the water masers toward UGC 3789, a galaxy well into the Hubble Flow. We have observed masers moving at rotational speeds up to 800 km/s at radii as small as 0.08 pc. Our map reveals masers in a nearly edge-on disk in Keplerian rotation about a 10^7 Msun supermassive black hole.

2012年7月31日 · In Papers I and II from the Megamaser Cosmology Project (MCP), we reported initial observations of water masers in an accretion disk of a supermassive black hole at the center of the galaxy UGC 3789, which gave an angular-diameter distance to the galaxy and an estimate of Ho with 16% uncertainty.

2010年5月11日 · In Paper I we presented a VLBI map of the maser emission from the Seyfert 2 galaxy UGC 3789. The map reveals an edge-on, sub-parsec disk in Keplerian rotation, analogous to the megamaser disk in NGC 4258. Here we present 3.2 years of monthly GBT observations of the megamaser disk in UGC 3789.

2020年2月26日 · ugc 3789 The disk megamaser in the galaxy UGC 3789 was discovered by Braatz & Gugliucci ( 2008 ), and the first VLBI map of the system was presented in Reid et al. ( 2009 ). This map was combined with acceleration measurements by Braatz et al. ( 2010 ) to produce an angular-size distance estimate of 49.9 ± 7.0 Mpc to the system.

2009年3月30日 · Here we present a VLBI map of the H 2 O masers toward UGC 3789, a galaxy well into the Hubble Flow. We have observed masers moving at rotational speeds up to 800 km s −1 at radii as small as 0.08 pc.

In Papers I and II from the Megamaser Cosmology Project, we reported initial observations of H2O masers in an accretion disk of a supermassive black hole at the center of the galaxy UGC 3789, which gave an angular-diameter distance to the …

Download scientific diagram | The UGC 3789 maser system, showing the warped disk, velocities and acceleration of maser spots. The top left and top right figures show the LOS velocities in km s −1...

In Papers I and II from the Megamaser Cosmology Project, we reported initial observations of H 2 O masers in an accretion disk of a supermassive black hole at the center of the galaxy UGC 3789, which gave an angular-diameter distance to the galaxy and an …

Here we present a VLBI map of the H 2 O masers toward UGC 3789, a galaxy well into the Hubble Flow. We have observed masers moving at rotational speeds up to 800 km s -1 at radii as small as 0.08 pc. Our map reveals masers in a nearly edge-on disk in Keplerian rotation about a 10 7 M sun supermassive black hole.

UGC 3789. The map reveals an edge-on, sub-parsec disk in Keplerian rotation, analogous to the megamaser disk in NGC 4258. Here we present 3.2 years of monthly GBT observations of the megamaser disk in UGC 3789. We use these observations to measure the centripetal accelerations of both the systemic and high-velocity maser components.