M82 look-alike? with superwind
by Budgieye moderator
There is red in the halo of this galaxy.
Red colour is due to hot hydrogen. See peak at 6700,
hot hydrogen is green at z=0.03
M82 in SDSS
M82 in Hubble
This is the spectrum taken from the green emission.
any close neighbours? I don't think so.
M82 and M82 in SDSS
Neighbour below M81 caused the massive starburst and hydrogen outflow in M82
Explanation: Also known as the Cigar Galaxy for its elongated visual
appearance, M82 is a starburst galaxy with a superwind. In fact,
through ensuing supernova explosions and powerful winds from massive
stars, the burst of star formation in M82 is driving a prodigious
outflow. Evidence for the superwind from the galaxy's central regions
is clear in this sharp telescopic snapshot. The composite image
highlights emission from long outflow filaments of atomic hydrogen gas
in reddish hues. Some of the gas in the superwind, enriched in heavy
elements forged in the massive stars, will eventually escape into
intergalactic space. Including narrow band image data in the deep
exposure has revealed a faint feature dubbed the cap. Perched about
35,000 light-years above the galaxy at the upper left, the cap appears
to be galactic halo material. The material has been ionized by the
superwind shock or intense ultraviolet radiation from the young,
massive stars in the galaxy's core. Triggered by a close encounter
with nearby large galaxy M81, the furious burst of star formation in
M82 should last about 100 million years or so. M82 is 12 million
light-years distant, near the northern boundary of Ursa Major.
no close neighbours....so if the hot H peak is signified @ 6700 and should be green @ Z = 0.03 and its red. then it's an overlap.? because the light is red shifted..? question @ what Z should hot H be red..?
by Budgieye moderator
Hot hydrogen is
green at z=0.0002 the M82 galaxy "nearby" 😃
red at z=0.03 AGZ000au55 (at this redshift, the green colour has been redshifted to red)
see Galaxy Redshift Guide http://talk.galaxyzoo.org/#/boards/BGZ0000007/discussions/DGZ0000ulp?page=2
So an overlap would be exciting, but I can't see it. But I should put this in objects that need more research.
single band I2 CFHT image and images from Subaru telescope available
Can post them a bit later if any of interest
so the hot H @ Z=0.03 should be red.. the Z of this galaxy is Z= 0.031.. so it must be a halo..? i've taken a good long look at this galaxy in DR2.. just to see the physics of the merger. ie . how the 2 galaxies have come together to form a 2 arm loose Bs (if that is the correct classification).? the bulge seem to be inclined by about 10-15 degrees to the plain of our view..edge on.? the 2 galaxies seam to have turned to align themselves. to come straight at each other.? ( is there enough mass to do this).? and to retain a undisturbed halo.???.well i'm just going to jump in with both feet.. i think it is what it is? a 3 way merger.? a large elliptical drawing in at a high velocity 2 smaller ellipticals from opposite directions giving a combined mass in either direction of 1 large + 1 small elliptical. hence straight in from either side stretching the 2 smaller galaxies so less disturbance of the halo. it looks like 3 bulges merging right at the centre very close almost touching 3 distortions, ultimately destroying what looks like a 2 arm loose Bs. just leaving a smoking gun but in 2 directions..(long shot) look @ RA: 158.68117 DEC:3.60984 @ 7 o'clock, only a (vapour) trail left of the smaller merging galaxy..
theres still something nagging me about this.. maybe it is just a merger of 2.?
il have to learn more about halo's and dark matter and brush up on gravity and how the 3 combine in a merger. to see how it effects the halo.?