Galaxy Zoo Talk

Blue / purple [magenta]object

  • Ghost_Sheep_SWR by Ghost_Sheep_SWR

    What is is the purple object? SDSS says star?

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    Posted

  • Budgieye by Budgieye moderator

    Purple (magenta) in SDSS could be a pea from z= 0.06 to 0.08

    Also possible a binary star, one blue and one red.

    http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?id=1237657774460764704

    Posted

  • Ghost_Sheep_SWR by Ghost_Sheep_SWR

    Ah, but also another magenta smudge / object 'behind' and below it, maybe associated or one and the same object?

    Question should be magenta objects

    Posted

  • Budgieye by Budgieye moderator

    changed title 😃 but not many people know what colour magenta is. Tedious explanation follows: It is not an artsy colour, it is a scienfific description of the mix of red and blue.

    RGB colour code RED=255, GREEN=0, BLUE=255

    Colour printers have a magenta cartridge.

    So a galaxy with a blue emission line of OIII and a red emission line of HI will be magenta.

    3.9 Spectra Guide : Physics and biology of colour

    http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000ulp?page=3&comment_id=53fef74525c64253c80003ac

    Posted

  • Ghost_Sheep_SWR by Ghost_Sheep_SWR in response to Budgieye's comment.

    😃 im used to the RAL system for colouring, not really applicable here 😦

    Thanks for the link, still have to really dive in there.

    Object(s) still look non-starlike to me. If there's 1 blue and 1 red star they will both look magenta, even when theres visible distance between them?

    Posted