Using the powerful Atacama Large Millimeter/submillimeter Array (ALMA), their team observed— for the first time ever— a narrow, spiral-shaped streamer of gas guided by magnetic fields, channeling matter from the surrounding cloud of a star-forming region in Perseus, directly onto a newborn binary star system.
Recent News
Astronomers Discover Fastest-Evolving Radio Signals Ever Observed from Black Hole Tearing Apart Star
An international team of astronomers has discovered the first radio-bright tidal disruption event (TDE) occurring outside a galaxy’s center using the U.S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO) Very Large Array (NSF VLA) and Atacama Large Millimeter/submillimeter Array (ALMA), along with several partner telescopes.
First-ever Detection of “Heavy Water” in a Planet-forming Disk
The discovery of ancient water in a planet-forming disk reveals that some of the water found in comets—and maybe even Earth—is older than the disk’s star itself, offering breakthrough insights into the history of water in our Solar System.
Observatory Receives Funds to Repair St. Croix Radio Telescope
Damage caused by Hurricane Maria in 2017
The National Science Foundation (NSF) has provided $2 million to repair damage to the Very Long Baseline Array
(VLBA) station on St. Croix in the U.S. Virgin Islands caused by Hurricane Maria in September of 2017. The funding is part of a bill passed by Congress and signed by the President on Feb. 9. The appropriations bill included disaster relief for hurricanes and wildfires during 2017.
The VLBA is a continent-wide radio telescope system providing the highest resolution, or ability to see fine detail, of any astronomical facility. It consists of ten stations, each with a dish antenna 25 meters in diameter, stretching from Hawaii to St. Croix. Eight of the stations are on the U.S. mainland.
The great distance between the VLBA’s antennas, up to 5,000 miles, is what makes possible the system’s great resolving power. Radio waves from cosmic objects are collected individually by each of the antennas, then combined electronically to make the system work as a single, giant radio telescope.
“The St. Croix telescope is a robust and reliable component of the Very Long Baseline Array,” said Richard Green, director of NSF’s Division of Astronomical Sciences. “The repairs afforded by the hurricane relief funds will ensure that the facility continues to serve as the key easternmost element of this continent-sized array.”
Hurricane Maria formed in the western Atlantic ocean, then entered the Caribbean Sea, devastating the island of Dominica before striking Puerto Rico and skirting the U.S. East Coast, in addition to its destruction on St. Croix. The storm is blamed for at least 146 deaths and more than $90 billion in damage.
Maria struck St. Croix as a Category 5 storm, with recorded wind gusts up to 137 mph. Officials estimated that 90 percent of the buildings on St. Croix were damaged or destroyed. The St. Croix VLBA station sustained damage to both its 240-ton antenna and the building housing its electronic equipment.
“This funding will allow us to bring the important St. Croix station back to a state of full health so it can continue to support the forefront scientific work of the VLBA,” said Walter Brisken, Director of the Long Baseline Observatory.
Dedicated in 1993, the VLBA has made major contributions to many areas of astronomical research, ranging from studying galaxies as they were when the Universe was a fraction of its current age to observing asteroids in our Solar System. The VLBA’s sharp radio “vision” has allowed it to precisely measure distances in our Milky Way and refine our home Galaxy’s map, and to make the most accurate distance measurements ever for objects beyond the Milky Way.
The VLBA also can be used to precisely determine the locations of its stations, allowing geophysicists to measure the effects of continental drift and climate change.
The Long Baseline Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc.
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Recent News
Astronomers Spot Magnetically-Guided Streamer Funneling Star-Building Material into Newborn System in Perseus
Using the powerful Atacama Large Millimeter/submillimeter Array (ALMA), their team observed— for the first time ever— a narrow, spiral-shaped streamer of gas guided by magnetic fields, channeling matter from the surrounding cloud of a star-forming region in Perseus, directly onto a newborn binary star system.
Astronomers Discover Fastest-Evolving Radio Signals Ever Observed from Black Hole Tearing Apart Star
An international team of astronomers has discovered the first radio-bright tidal disruption event (TDE) occurring outside a galaxy’s center using the U.S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO) Very Large Array (NSF VLA) and Atacama Large Millimeter/submillimeter Array (ALMA), along with several partner telescopes.
First-ever Detection of “Heavy Water” in a Planet-forming Disk
The discovery of ancient water in a planet-forming disk reveals that some of the water found in comets—and maybe even Earth—is older than the disk’s star itself, offering breakthrough insights into the history of water in our Solar System.