Solar splashdown provide new insights into how young stars grow by sucking up nearby gas
The eruption and subsequent splashdown were observed in spectacular detail by NASA's Solar Dynamics Observatory. This spacecraft watches the Sun 24 hours a day, providing images with better-than-HD resolution. Its Atmospheric Imaging Assembly instrument was designed and developed by researchers at the Harvard-Smithsonian Center for Astrophysics (CfA).
"We're getting beautiful observations of the Sun. And we get such high spatial resolution and high cadence that we can see things that weren't obvious before," says CfA astronomer Paola Testa.
Movies of the June 7th eruption show dark filaments of gas blasting outward from the Sun's lower right. Although the solar plasma appears dark against the Sun's bright surface, it actually glows at a temperature of about 18,000 degrees Fahrenheit. When the blobs of plasma hit the Sun's surface again, they heat up by a factor of 100 to a temperature of almost 2 million degrees F. As a result, those spots brighten in the ultraviolet by a factor of 2 -- 5 over just a few minutes.
The tremendous energy release occurs because the in falling blobs are traveling at high speeds, up to 900,000 miles per hour (400 km/sec). Those speeds are similar to the speeds reached by material falling onto young stars as they grow via accretion. Therefore, observations of this solar eruption provide an "up close" view of what happens on distant stars.
"We often study young stars to learn about our Sun when it was an 'infant.' Now we're doing the reverse and studying our Sun to better understand distant stars," notes Testa.
These new observations, combined with computer modeling, have helped resolve a decade-long argument over how to measure the accretion rates of growing stars. Astronomers calculate how fast a young star is gathering material by observing its brightness at various wavelengths of light, and how that brightness changes over time. However, they got higher estimates from optical and ultraviolet light than from X-rays.
The team discovered that the ultraviolet flashes they observed came from the in falling material itself, not the surrounding solar atmosphere. If the same is true for distant, young stars, then by analyzing the ultraviolet light they emit, we can learn about the material they are accreting.
"By seeing the dark spots on the Sun, we can learn about how young stars accrete material and grow." explains Testa.
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.
C-002RX 32.7680K-E C-002RX 32.7680K-A:PBFREE C-002RX 32.7680K-A C-001R 32.7680K-E C-001R 32.7680K-A:PBFREE C-001R 32.7680K-A BZY97C91 BZY97C82 BZY97C75 BZY97C68 BZY97C62 BZY97C56 BZY97C51 BZY97C47 BZY97C43 BZY97C39 BZY97C36 BZY97C33 BZY97C30 BZY97C27 BZY97C24 C016 20H003 200 10 C016 20H003 110 12 C016 20H003 110 10 C016 20H003 100 12 C016 20H003 100 10 C016 20G003 200 12 C016 20G003 100 12 C016 20F003 100 12 C016 20F003 100 10 C016 20D003 210 12 C016 20D003 210 10 C016 20D003 200 12 C016 20D003 200 10 C016 20D003 110 12 C016 20D003 110 10 C016 20D003 100 12 C016 20D003 100 10 C016 20C003 200 12 C016 20C003 100 12
http://www.suvsystem.com/a/3086.aspx
