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Thread: M77 / Arp 37

  1. #1
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    Default M77 / Arp 37



    M77 (Arp 37, NGC 1068, UGC 2188 and many others) is a barred spiral galaxy located approximately 47 million light-years away in Cetus. Arp classified this one as Spiral Galaxies – Companions on Arms – Low Surface Brightness Companions. Your guess is as good as mine.

    Luminance – 24x600s – 240 minutes – binned 1x1
    RGB – 8x300s – 40 minutes each – binned 2x2

    360 minutes total exposure – 6 hours

    Imaged September 4th, 8th and 30th, 2016 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

    LRGB - https://www.flickr.com/photos/dcrows...735744/sizes/l

    M77 - LRGB.jpg

    Dan
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    Default Re: M77 / Arp 37

    Great image Dan.

    Thanks for posting.
    Clear skies.
    Brodavid1953 likes this.
    Peter.

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    Default Re: M77 / Arp 37

    Very nice image, Dan.
    Thank you.
    ES 80 Apo

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    Default Re: M77 / Arp 37

    Nice job. I don't think I was aware of the outer dust ring before seeing this image. Very neat!

    Bob
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    Default Re: M77 / Arp 37

    Great capture Dan!
    My guess is Arp was correct and that the "companions" are the small remote galaxies seen behind the arms.
    It doesn't look spiral to me.
    It has to be noted that H C Arp had some disagreements regarding the nature of the red shift.
    I attended one of his lectures many years ago.
    His stance was that redshifts were not all due to expansion of the universe.
    He showed images and data that showed some galaxies close to larger ones (and apparently related) did not have the same red shifts as the larger.
    It was implied that the smaller ones had been ejected from the larger and occurred in pairs on either side with equal but much greater red shifts.
    Thence proving that not all red shifts could be due to expansion and that the effect was intrinsic to the objects themselves.
    I understand that now these anomalies are considered caused by gravity lensing of more distant galaxies with true greater red shifts hence the doubling or even quadrupling seen of just one luckily placed but much more distant galaxy.
    On the face of it seemed a fair idea but now we know of the effects of lensing in the light of better images from the ground and space.
    The truth is out there......
    BABOafrica likes this.
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    Default Re: M77 / Arp 37

    Very nice job
    He has passed on his legacy to his daughter as of 09/26/2017.
    Now he views the stars closeup.
    "If people would look up into the night sky as intently and as passionately as they do their phones, they would be amazed"
    >)))))*>

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    Default Re: M77 / Arp 37

    Wow, you really pulled out the faintness of those outer regions perfectly.

    Beautiful capture, Dan. Beautiful.

    Clears,
    Joe
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    Default Re: M77 / Arp 37

    Impressive! Great work!
    Marius
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    Default Re: M77 / Arp 37

    A great capture, Dan - fantastic detail! Thanks for sharing.
    Lea
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