Galaxy Zoo Talk

symmetrical green object, a nebula?

  • Budgieye by Budgieye moderator

    At first I thought it must be a artifact of a cosmic ray hit. But with use of Ctrl+, I see what looks like a bipolar nebula, or relativistic jets of some sort.

    enter image description here

    enter image description here

    RA: 189.3777083, DEC: 62.1615786


  • Clinton_Eveleigh by Clinton_Eveleigh

    Could anyone furnish me with information on how to further investigate this galaxy and this "object" within it.
    I cannot seem to find any info online.
    It may be hidden in science journals that I am not aware of?



  • Budgieye by Budgieye moderator

    How to find more info on your Hubble galaxy? The short answer is that you can't. You are at the frontiers of knowledge. These Hubble galaxies are extremely distant, and dim blobs in other telescopes, so they won't be included in other surveys, such as SDSS.

    You can go into the references cited in NED, and find a distance. A redshift z is determined by a spectra chart.. Redhsifts are usually correct when looking at emission galaxies, which have a big spike that the software can lock onto. Maybe not so good for galaxies with a flatter spectrum such as red ellipticals.

    PHOT is a photoz which is a guess of the redshift by a software algorithm. It can be correct or wildly wrong.

    I look at the lists of references, and if it says "emission galaxies" or "Lyman break galaxies" it gives me a clue about what the galaxy might be. The best you can do is learn about other galaxies and use your experience to guess the characteristics of this one, using shape and colour as clues. It doesn't help much to look at the article, they only have graphs, no images, and rarely talk about individual galaxies, and often have 20,000 objects that they have looked at. Some of the references you would need to pay for, some seem to give it out free in .pdf and some let you see and copy from computer-readable scientific papers.

    You can go though the references, maybe come out with a fuzzy spectrum. It will be a lot of work for little information. Some of us are good at searching databases or making their own FITS images, I'm not one of them. Eventually I hope that the link to spectrum in NED will be connected to the databases.

    You can try the search engine Google scholar but it will probably take you back to the same references as NED.

    The database SIMBAD is mostly for stars, and it has only the brighter galaxies, and it has the annoying habit of showing you the next closest object, so you think you have found your galaxy.

    Have you looked through the featured discussions?

    Astrophysics for Galaxy Zoo Talk - redshift z PhotoZ spectra emissions AGN

    Galaxy Zoo Index which is half finished, but has a link to all topics that Galaxy Zooites need to know.

    #1 How do I : Find out more information about the galaxy I have classified? (for the SDSS images) The co-ordinates for the galaxy above are RA: 189.3777083, DEC: 62.1615786 which tells me that it in the north and will be on SDSS footprint. . Put them in and see what you get.

    Explore data, do science, and share findings with Zoo Tools Basically just click on "Open in Tools" on the Image page, or play with the filters in the Examine page. This can be used for looking for UV light, which indicates a high energy event. This is good for the CANDELS images, but not the GOODS image like this, the filter information is not fed into it.

    The green object is likely to be a cosmic ray hit, that co-incidentally looks like a supernova nebula, so it would be just an artifact. But I put it in just in case it turned out to be something interesting. A cosmic ray will appear in only one filter image, eg green, like this one. But I can't do that at the moment, because it is a GOODS image, and not linked to Examine.

    There are Hubble images in Hubble Zoo from 2010 to 2014, but most are the 2-colour images, so not very helpful.

    Anyone got more useful hints?