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Thread: AGN in dwarf galaxy with low mass BH

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    Default AGN in dwarf galaxy with low mass BH



    Past items italicized. Scopes: Refractors: Orion ST80 (mods for white light solar), SV ED80 f7, Orion and SW 80 and 120 ED, Orion ED80T, Orion 120 f8.3, Tasco 30x30, Edmund 40; Newtonians: AT 8”f4, OC 8”f6.3, Z12 f5, self made 6” f9, Orion 10" f4.7, Orion XX14i; Catadioptrics: VMC110L, Intes MK66, Orion 102 MakCas f12.7, Celestron 9.25 SCT and 9.25 Edge. EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, TV Nagler, ES100s, Edmund Orthoscopics, Baader Hyperions. Mounts: Orion Sirius EQG, Star Seeker III, Celestron CG5, Vixen Porta II, Orion Atlas, Losmandy G11

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    Default Re: AGN in dwarf galaxy with low mass BH

    Guess that one is out of reach for me. 340 Mly and face-on orientation.
    Bryan
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    Default Re: AGN in dwarf galaxy with low mass BH

    It's always amazing what they can determine at those vast distances. Thanx for the post. johnnyb
    johnnyb - Orion XT10G, ES 62 degree 9mm, ES 82 degree 18mm, Celestron Skymaster 20x80 binocs, Celestron Skymaster 12x60 binocs, Oberwerk 10x60 Marine Binocs, Simmons 10x50 binocs, Vestil CPRO 600, Nikon D90 DSLR with an assortment of lenses and a wide plethora of questions.

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    Default Re: AGN in dwarf galaxy with low mass BH

    Quote Originally Posted by bladekeeper View Post
    Guess that one is out of reach for me. 340 Mly and face-on orientation.
    Here's another image and coordinates

    Chandra :: Photo Album :: RGG 118 :: August 11, 2015

    I can't find it on Simbad so it likely too faint to be bothered with.
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    Default Re: AGN in dwarf galaxy with low mass BH

    Well the full paper is available Hubble Space Telescope Imaging of the Active Dwarf Galaxy RGG 118 - IOPscience

    and it talks about magnitude 22.5 per arc second and this thing is only 3 arc minutes across. I think you'd need a Bortle 1 or 2 sky to have a shot.
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    Default Re: AGN in dwarf galaxy with low mass BH

    Quote Originally Posted by not_Fritz_Argelander View Post
    Well the full paper is available Hubble Space Telescope Imaging of the Active Dwarf Galaxy RGG 118 - IOPscience

    and it talks about magnitude 22.5 per arc second and this thing is only 3 arc minutes across. I think you'd need a Bortle 1 or 2 sky to have a shot.
    That translates to a surface brightness of 13.61 mag/arcmin². Not too shabby. I've had worse. Of course, if the whole disk is 3' across, the best we could hope for is the AGN, and that would be tiny indeed.

    I do indeed agree that a Bortle 1 or 2 and nice transparency would be key factors. I think I'll pass.
    Bryan
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    Binoculars: Pentax PCF WP II 10×50, Bresser Corvette 10×50, Bresser Hunter 16×50 and 8×40, Garrett Gemini 12×60 LW, Gordon 10×50, Apogee 20×100[/I]

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