NGC 3299 – background galaxy shining through disk?

There is a high redshift galaxy (object 2 in Figure 1) within the disk of NGC 3299. Only two other objects have measùred redshifts within 5 arcmin from NGC 3299. There is a measurement of a HII region or similar in NGC 3299 disk (object 3) and further out there’s a high redshift galaxy (object 4).

There are some interesting objects without redshifts, though. Objects A and B are exactly aligned across NGC 3299. Object B is within NGC 3299’s disk and object A is at the edge of it. Object 2 is located in the alignment line of objects A and B. Objects A and B seem to be galaxies but B is little difficult to classify. Object C also is located in the alignment line but it could be a foreground star. Photometric redshifts from SDSS would indicate that objects A – C are high redshift galaxies but photometric redshifts are not very reliable for single objects.

There are plenty of other interesting objects in the field, including several QSO candidates (I have marked closest of them as object D) and couple of apparent high redshift galaxies aligned with nucleus of NGC 3299 (objects E and F). There’s also a pair alignment with apparent high redshift galaxies (objects G and H).


Figure 1. The objects with measured redshifts near NGC 3299. Size of the image is 5 x 5 arcmin (click for a larger view). Image is from Sloan Digital Sky Survey (SDSS).

Objects and their data

NBR NAME TYPE REDSHIFT MAG SEPARATION
1 NGC 3299 SAB(s)dm 0.002138 (641 km/s) 13.30 0
2 SDSS J103623.53+124256.1 Galaxy 0.265909 15.4 (g) 0.496
3 LEDA 3537486 PofG 0.001794 (538 km/s) 15.6 (g) 0.644
4 SDSS J103613.76+124257.9 galaxy 0.220862 19.1 (g) 2.503

NED objects within 10′ from NGC 3299.

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2 Responses

  1. Thanks Ari.

    By now you must have added substantially to Arp’s data. Will you be publishing an update (in book form)?

    O/T Incidentally, I find it interesting that
    (1) Schmidt, Reiss and Pearlmutter recently received the Nobel Prize for their work with photometry of Type 1a supernovae
    (2) Their analysis was, of course, based on the then current model of Type 1a supernovae comprising a binary system with mass transfer from a companion donor star through an accretion disc onto a white dwarf with detonation occurring once the Chandrasekhar limit had been exceeded.
    (3) More recently a search for the companion donor stars assumed to be associated with known Type 1a supernovae failed to find them! (Unfortunately I don’t have the reference to hand).
    (4) Most of the ‘consensus’, textbook models of supernovae (including Type II) have now been challenged by observational data and the underlying physics remain a mystery.

    A couple of questions occur to me viz.
    Is it possible that the ‘donor stars’ are destroyed/dispersed by the blast? Or perhaps ‘ejected’ away from the scene.
    More importantly, what are the implications for the results/interpretation of the high z supernova project?

  2. Thank you for the interest. I have published here several new systems, and there’s plenty more to come, so stay tuned (I’m currently a bit more active in this than I have been recently – there’s already another post building up and I expect to post it in few days – it’s another new system with quite curious type of discordant redshift issue). I’m going to publish these things at some point, but my goal is to do so in peer-reviewed journals, at least to start with.

    Sorry, but I haven’t kept an eye to supernova issues, so I can’t comment on that.

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