Galaxy Zoo Talk

Classification

  • Ariaiyc_goingawayn0w by Ariaiyc_goingawayn0w

    I looked at the spectra of this on SDSS. It has high H-alpha and VERY high O-III.
    Here it just looks bright and a little blueish, the brightness and blueness are even greater there(SDSS). Does anyone have a moment to explain this 😄

    Posted

  • JeanTate by JeanTate in response to Ariaiyc's comment.

    Here's the spectrum of SDSS J162758.29+201444.1:

    enter image description here

    This is very much what an on-going 'starburst' looks like; where a large number of stars are forming in a small space ('small' by astronomers' standards!) in a short time. The (strong) emission lines - from [OII] to [ArIII] - are produced in the many nebulae associated with the brightest of the young stars, rather than the stars themselves; sorta like the Orion Nebula, a thousand times over.

    The blueishness in the images is due to a combination of the way the filters are combined to produce the RGB images and the dominance of the two bright [OIII] emission lines (plus H-beta); these fall in the part of the spectrum captured by the g-band filter and mapped to the B in RGB images.

    Hope this helps, and happy hunting! 😃

    Posted

  • Ariaiyc_goingawayn0w by Ariaiyc_goingawayn0w in response to JeanTate's comment.

    Yes and thanks!

    Posted