Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree

Image of the day 12/08/2014

Getting plate-solving status, please wait...
    Barnard 3  : Chaos in the sky, 





    
        

            Antonio F. Sánchez
    Barnard 3  : Chaos in the sky

    Technical card

    Resolution: 2309x1700

    Dates:Oct. 25, 2014Oct. 28, 2014Oct. 30, 2014Nov. 19, 2014

    Frames:
    Optec 50mm B: 37x600" -25C bin 1x1
    Optec 50mm G: 36x600" -25C bin 1x1
    Optec 50mm L: 80x600" -25C bin 1x1
    Optec 50mm R: 37x600" -25C bin 1x1

    Integration: 31.7 hours

    Avg. Moon age: 9.86 days

    Avg. Moon phase: 19.41%

    Bortle Dark-Sky Scale: 2.00

    Astrometry.net job: 427528

    RA center: 55.068 degrees

    DEC center: 32.037 degrees

    Pixel scale: 1.430 arcsec/pixel

    Orientation: -179.587 degrees

    Field radius: 0.569 degrees

    Description

    This is Barnard 3, a dusty, gassy region of the galaxy about a thousand light years away where young stars are lighting up their neighborhood.Complex molecules similar to soot, called polycyclic aromatic hydrocarbons or PAHs. .

    So what’s going on here? Near the center is a F2 white-yellow star ( HD 278942) which is brighter and hotter than our Sun, and is flooding the surrounding material with ultraviolet light and a fast wind of subatomic particles (like the Sun’s solar wind, but a whole lot stronger and with a much, much farther reach). This has carved out a gigantic cavity in that stuff, creating a bubble about 25 light years in diameter — that’s huge: 250,000,000,000,000 kilometers across, more than 10,000 times the size of our solar system!

    The UV from the star is making the gas glow.In optical light (this object is a mess , with gas emitting light, reflecting light, and dust absorbing it. When gas is lit up this way around a star, it’s called a Strömgren sphere, after the astronomer Bengt Strömgren who did the first theoretical work on them.
    An infrared image of the area can be seen here:http://wise.ssl.berkeley.edu/gallery_Barnard3.html

    Credit: (Phil Plait, Discover Magazine, December 2011)

    Comments

    Author

    afesan
    Antonio F. Sánchez
    Like

    Sky plot

    Sky plot

    Histogram

    Barnard 3  : Chaos in the sky, 





    
        

            Antonio F. Sánchez