KALYPSO Data

Radio source I in the Orion KL region, our target, is the closest known massive YSO. Compact regions of high brightness, non-thermal (maser) emission pepper the bulk flows around source I, which enables resolution of gas structure and 3-D dynamics with high accuracy by the Very Long Baseline Array (VLBA), Very Large Array (VLA), and MERLIN facility (up to ~0.3 AU and ~1 km s^-1). A preliminary four month time-series of VLBA images (e.g., see "Recent Results" page) graphically showns dense molecular material at radii of 10-100 AU being driven at speeds of ~25 km s^-1 from the surface of an accretion disk or the edge of an accretion flow to form a rotating funnel-like bipolar flow. This is a first for a high-mass young star, but it is only a start. The Kalypso program will create a multi-year time-series of images for material 10-1000 AU from sourceI, using data from the VLBA, VLA, and MERLIN. Velocity and acceleration fields will be mapped in 3-D and compared to the magnetic field configuration inferred from linear polarization observations of maser emission. All necessary VLBA data (40 epochs) are in hand. About half of the VLA and MERLIN data are in hand. The broader impact of the time-series of radio images will be achieved by their assembly into a movie of "a star in formation."

KALYPSO Data to Education

The movie will be the cornerstone of a CD-ROM and web-based education program, developed with the SAO Science Education Department and directed to both students and the general public, via schools, planetariums and museums. These materials will also be available for inclusion in education programs on star formation, the recycling of "star stuff", and the nature of scientific investigation.

Summary of Observations

Observation Date	Telescope	Resolution (milliarcseconds)	Polarization capable?	Status
		SiO v=0
28 Aug 1999	VLA	30	yes	preliminary reduction
1 Apr 2002	VLA	30	yes	reduction pending
Winter 2006	VLA	30	yes	proposed
		SiO v=1 and v=2
9 July 1995 to 15 Sep 1995	VLBA	0.1	no	3 epochs: preliminary reduction
30 Jun 2000	VLBA	0.1	no	4 epochs: reduced 33 epochs: reduction pending
		H2O
24 Jan 2001	VLA	50	no	fully reduced
Fall 2004	MERLIN	10	no	scheduled
Fall 2006	MERLIN	10	no	to be proposed
Fall 2007	MERLIN	10	no	to be proposed

KALYPSO Data Archive

We will make public all calibrated data, spectral-line image cubes, and moment maps (e.g., mean velocity as a function of position) for each epoch, via the web.