Pill-popping galaxy hooked on gas
Nov. 25, 2013 — "Food pills" were a staple of science fiction for decades. For our Galaxy, they may be real.
Share This:
The Galaxy has been making stars for the last 8 billion years. What's kept it going all that time?
When old stars die, some of their gas goes back into the galactic "soup" for star making. But in the long run a lot of it gets locked up in long-lived dwarf stars.
So the Galaxy needs fresh supplies of gas.
Astronomer think that gas rains in from intergalactic space, probably in the form of "clouds," and that this fuels the star-making.
But there's a problem.
If a regular gas cloud were to hit the warm outer parts of the Galaxy -- the halo -- the gas would dissipate, and not reach the Galaxy's starry disk where the party is going on.
Something must hold the gas clouds together on their way to the Galaxy's digestive system.
CSIRO astronomer Alex Hill and his colleagues think they have the answer.
These researchers have been studying a gas cloud falling into the Galaxy -- a big one, called the Smith Cloud, after the woman who discovered it -- and have found it has a magnetic field.
The field is weak, about 0.002% of the strength of Earth's.
But the astronomers think it's strong enough to hold the cloud together, so that it can deliver its payload of gas into the Galaxy's disk.
The Cloud's like a coated aspirin tablet that goes through your stomach undigested, then releases its contents when it hits your intestine.
Also known as Smith's Cloud, it's one of thousands of high-velocity clouds of hydrogen gas flying around the outskirts of our Galaxy.
Astronomers think their origins are mixed, some stemming from burst "bubbles" in the gas of our Galaxy, some being primordial gas, and some associated with small galaxies our Galaxy's gravity is shredding from a distance. The Smith Cloud is probably either semi-primordial gas condensing from the halo of our Galaxy or gas stripped from another galaxy.
Welcome to SUV System Ltd!
SUV System Ltd is ISO 90012008 Certified electronics distributor with 10 years of experiences.
We have built up long term business relationship with about many companies which are stockers and authorized agents. we have a steady and reliable supply to meet customer's demands to the greatest extent .Confidently, we are able to lower your cost and support your business with our years of professional service.
SUV System Ltd is Electronic Components Distributor Supplies,Find Quality Electronic Components Supplies Products IC(Integrated Circuits),Connectors,Capacitor,Resistors,Diodes,Transistors,LED at Suvsystem.com. Sourcing Other Energy, Environment, Excess Inventory Products from Manufacturers and Suppliers at Suvsystem.com
Electronic Components distributor:http://www.suvsystem.com
Connectors Distributor:http://www.suvsystem.com/l/Connectors-1.html
IC Distributor:http://www.suvsystem.com/l/IC(Integrated-Circuits)-1.html
LED Distributor:http://www.suvsystem.com/l/LED-1.html
Capacitor Distributor:http://www.suvsystem.com/l/Capacitor-1.html
Transistor Distributor:http://www.suvsystem.com/l/Transistors-1.html
Resistor Distributor:http://www.suvsystem.com/l/Resistors-1.html
Diode Distributor:http://www.suvsystem.com/l/Diodes-1.html
SUV System Ltd insists on the managing faith ofsincereness,speciality,foresight, win-win,so we build up stable-relationship customers located all over the world, including the States, Europe, Argentina, UAE, Malaysia, Australia,and India etc
we are focus on the following fields,and hope we can help you.
Chip Ferrite Beads Industrial IC ST Diodes Atmel IC INFLNEON Diodes ON Transistors Ligitek LED HARRIS IC Multi-units Transistors YAGEO Resistors NEC Transistors Resistors Low Ohmic Resistors INTERSIL IC chip Filter saws PANASONIC Zener Diodes AD IC BB IC Switches Military IC PANASONIC Resistors Schottky Diodes Chip Inductors Fleld Effect Transistors About US Metal Can Packages Transistors Freescale Semiconductor Current Sensors Resistors Resistor Arrays Vishay resistors DIODES Transistors Diodes Inc Other Parts LINEAR IC LITTELFUSE Diodes Fairchild Semiconductor Transistors Resistor Networks NXP Diodes Capacitor
http://www.suvsystem.com/a/7344.aspx
