APOD: Spiral Galaxy NGC 2841 (2023 Mar 23)

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APOD Robot
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APOD: Spiral Galaxy NGC 2841 (2023 Mar 23)

Post by APOD Robot » Thu Mar 23, 2023 4:05 am

Image Spiral Galaxy NGC 2841

Explanation: A mere 46 million light-years distant, spiral galaxy NGC 2841 can be found in planet Earth's night sky toward the northern constellation of Ursa Major. This sharp image centered on the gorgeous island universe also captures spiky foreground Milky Way stars and more distant background galaxies within the same telescopic field of view. It shows off the bright nucleus of NGC 2841, along with its inclined galactic disk, and faint outer regions. Dust lanes, small star-forming regions, and young star clusters are embedded in the galaxy's patchy, tightly wound spiral arms. In contrast, many other spirals exhibit broader, sweeping arms with large star-forming regions. NGC 2841 has a diameter of over 150,000 light-years, making it even larger than our own Milky Way. X-ray images suggest that extreme outflows from giant stars and stellar explosions create plumes of hot gas extending into a halo around NGC 2841.

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VictorBorun
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Re: APOD: Spiral Galaxy NGC 2841 (2023 Mar 23)

Post by VictorBorun » Thu Mar 23, 2023 5:12 am

this big and halo-rich, is it in fact half-elliptical galaxy?

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Ann
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Re: APOD: Spiral Galaxy NGC 2841 (2023 Mar 23)

Post by Ann » Thu Mar 23, 2023 6:03 am

VictorBorun wrote: Thu Mar 23, 2023 5:12 am this big and halo-rich, is it in fact half-elliptical galaxy?
NGC 2841 is the prototype flocculent galaxy:

Wikipedia wrote about NGC 2841:

This is the prototype for the flocculent spiral galaxy, a type of spiral galaxy whose arms are patchy and discontinuous. The morphological class is SAa, indicating a spiral galaxy with no central bar and very tightly-wound arms. There is no grand design structure visible in the optical band, although some inner spiral arms can be seen in the near infrared. It is inclined by an angle of 68° to the line of sight from the Earth, with the major axis aligned along a position angle of 148°.

The properties of NGC 2841 are similar to those of the Andromeda Galaxy.
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orin stepanek
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Re: APOD: Spiral Galaxy NGC 2841 (2023 Mar 23)

Post by orin stepanek » Thu Mar 23, 2023 5:38 pm

NGC2841_1024.jpg
Hi; i really don't have any time for coments so i just posted toays APOD!
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Orin

Smile today; tomorrow's another day!

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Re: APOD: Spiral Galaxy NGC 2841 (2023 Mar 23)

Post by johnnydeep » Thu Mar 23, 2023 7:49 pm

Ann wrote: Thu Mar 23, 2023 6:03 am
VictorBorun wrote: Thu Mar 23, 2023 5:12 am this big and halo-rich, is it in fact half-elliptical galaxy?
NGC 2841 is the prototype flocculent galaxy:

Wikipedia wrote about NGC 2841:

This is the prototype for the flocculent spiral galaxy, a type of spiral galaxy whose arms are patchy and discontinuous. The morphological class is SAa, indicating a spiral galaxy with no central bar and very tightly-wound arms. There is no grand design structure visible in the optical band, although some inner spiral arms can be seen in the near infrared. It is inclined by an angle of 68° to the line of sight from the Earth, with the major axis aligned along a position angle of 148°.

The properties of NGC 2841 are similar to those of the Andromeda Galaxy.
Ann
How similar I have to ask? Is Andromeda a flocculent galaxy as well? Andromeda has a central bar, but NGC 2841 does not.
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Ann
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Re: APOD: Spiral Galaxy NGC 2841 (2023 Mar 23)

Post by Ann » Thu Mar 23, 2023 8:23 pm

johnnydeep wrote: Thu Mar 23, 2023 7:49 pm
Ann wrote: Thu Mar 23, 2023 6:03 am
VictorBorun wrote: Thu Mar 23, 2023 5:12 am this big and halo-rich, is it in fact half-elliptical galaxy?
NGC 2841 is the prototype flocculent galaxy:

Wikipedia wrote about NGC 2841:

This is the prototype for the flocculent spiral galaxy, a type of spiral galaxy whose arms are patchy and discontinuous. The morphological class is SAa, indicating a spiral galaxy with no central bar and very tightly-wound arms. There is no grand design structure visible in the optical band, although some inner spiral arms can be seen in the near infrared. It is inclined by an angle of 68° to the line of sight from the Earth, with the major axis aligned along a position angle of 148°.

The properties of NGC 2841 are similar to those of the Andromeda Galaxy.
Ann
How similar I have to ask? Is Andromeda a flocculent galaxy as well? Andromeda has a central bar, but NGC 2841 does not.
I don't think they are very similar.

Their similarity may be that they are big galaxies with large bright centers and tightly wound arms. But the way I understand it, Andromeda is actually a lot more massive and luminous than NGC 2841.

And as you said, Andromeda isn't a flocculent galaxy. Interestingly, Andromeda hardly has any arms at all, but rather a set of large rings. Of course, NGC 2841 has poorly developed arms.

Andromeda and NGC 2841 are underachievers in the arm business!


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Re: APOD: Spiral Galaxy NGC 2841 (2023 Mar 23)

Post by Avalon » Fri Mar 24, 2023 2:34 am

So, I found different sites that listed NGC 2841 as both barred and unbarred. I suppose more research needs to be done as Andromeda was recently found to be a barred galaxy.

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Re: APOD: Spiral Galaxy NGC 2841 (2023 Mar 23)

Post by johnnydeep » Fri Mar 24, 2023 1:52 pm

Avalon wrote: Fri Mar 24, 2023 2:34 am So, I found different sites that listed NGC 2841 as both barred and unbarred. I suppose more research needs to be done as Andromeda was recently found to be a barred galaxy.
Yeah, I noticed that too after doing some more googling.
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