IFN bath (M81 / M82) (Julien Dufour)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: 24 UMa) · 24 d UMa · Bode's Galaxy · Cigar Galaxy · HD81936 · HD82992 · HD83489 · HD83838 · HD85161 · HD85458 · HD85533 · M 81 · M 82 · NGC 3031 · NGC 3034 · The star Althiba VII (d UMa

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IFN bath (M81 / M82)

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IFN bath (M81 / M82)

Location

Located in the constellation Ursa Major, the galaxies M81 and M82 are about 12 million light-years away from us. The galaxies are on the same plane, only about 120,000 light-years apart (M81 has a diameter of 87,000 light-years).They are part of the Virgo Supercluster.

Galaxy type

M81 and M82 are spiral galaxies. It's difficult to realize with M82 because we observe it almost edge-on (at 80 degrees) and the galaxy is very bright.

Activity

M81 and M82 are gravitationally interacting. The resulting tidal forces deform M82 and cause violent stellar activity. The star formation rate is 10 times higher than normal. The powerful bipolar jets of matter (1000 km/sec) are thought to be maintained by supernova explosions (4 have already been observed). M82 is a starburst galaxy.

The Ha image reveals numerous areas of star formation :

IFN

The IFN (Integrated Flux Nebula) present in the image are not part of the same local group, but rather belong to our Milky Way.

Acquisitions & processing :

The acquisitions were made over several sessions and several sites.
The Ha & Oiii were captured from my Bortle 7 backyard with a strong presence of the moon.
The color and luminance layers were made under a darker sky, in Bortle zone 3 & 4.

Only 3h30 of luminance (out of 12h) were made in good seeing conditions.
I used this data for the galaxies and stars.
However, I kept the 12h of luminance to bring out the IFNs.

All the processing with Pixinsight.

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	7333717
PixInsight job	DTHSEY5YTJ9UZ5T6EA3VYRIYSYSZJO7M
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h46m37s.56
RA (top/left)	09h59m59s.20
RA (top/right)	10h02m00s.31
RA (bottom/right)	09h32m07s.00
RA (bottom/left)	09h32m18s.63

Dec (center)	+69°36′57″.8
Dec (top/left)	+68°41′13″.9
Dec (top/right)	+70°21′05″.6
Dec (bottom/right)	+70°28′36″.4
Dec (bottom/left)	+68°48′06″.5

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IFN bath (M81 / M82)

IFN bath (M81 / M82)

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Image Index:

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IFN bath (M81 / M82)

IFN bath (M81 / M82)

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