APOD: Supernova Remnant Puppis A (2014 Sep 12)

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APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by APOD Robot » Fri Sep 12, 2014 4:05 am

Image Supernova Remnant Puppis A

Explanation: Driven by the explosion of a massive star, supernova remnant Puppis A is blasting into the surrounding interstellar medium about 7,000 light-years away. At that distance, this remarkable false-color exploration of its complex expansion is about 180 light-years wide. It is based on the most complete X-ray data set so far from the Chandra and XMM/Newton observations, and infrared data from the Spitzer Space Telescope. In blue hues, the filamentary X-ray glow is from gas heated by the supernova's shock wave, while the infrared emission shown in red and green is from warm dust. The bright pastel tones trace the regions where shocked gas and warmed dust mingle. Light from the initial supernova itself, triggered by the collapse of the massive star's core, would have reached Earth about 3,700 years ago, though the Puppis A supernova remnant remains a strong source in the X-ray sky.

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Beyond » Fri Sep 12, 2014 4:25 am

I do like the nice green stars scattered about. Judging by the colors, Puppis A would seem to be a rather complicated thing.
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by User loser » Fri Sep 12, 2014 4:49 am

Like the fist of an angry god!

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Nitpicker » Fri Sep 12, 2014 5:08 am

At 7000 light years distant, I think the "180 light years wide" comes from the ROSAT image, 88 arcmin across, in the Wikipedia article (http://en.wikipedia.org/wiki/Puppis_A), viz:
180 = 7000 * tan(88/60)

So, that would make the longest axis of SR Puppis A about 110 light years, which more or less matches the width of the APOD, as well.

And 3700 years ago, due to precession, it would have had a declination of about -36&deg; (roughly 7&deg; more northward than it is now) which may have made it more visible to more of the historic (post written records) civilisations around at the time.

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by bystander » Fri Sep 12, 2014 5:26 am

Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by starsurfer » Fri Sep 12, 2014 8:31 am

I don't understand how there are almost no optical images of this! It has lots of Ha emission and it also belongs to the category of oxygen rich supernova remnants, so it also has lots of OIII.

Don Goldman needs to get on the case! :D

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by yasgur » Fri Sep 12, 2014 9:58 am

User loser wrote:Like the fist of an angry god!
It does look a bit like a clenched fist, doesn't it. Although, it seems to have it's thumb tucked inside it's fingers against the palm which is the road to dislocation. :)

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Boomer12k » Fri Sep 12, 2014 11:18 am

Must have been a Sight to see when it happened....

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by NCTOM » Fri Sep 12, 2014 11:57 am

What would be the impact of these massive shock waves on nearby star systems, say within twenty light years?

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Anna Phylaxis » Fri Sep 12, 2014 12:56 pm

I don't understand how that angry fist can be 7,000 light years away and yet became visible to us 3,700 years ago. Surely the light from the supernova didn't break its own speed limit, did it? :?

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Nitpicker » Fri Sep 12, 2014 1:15 pm

Anna Phylaxis wrote:I don't understand how that angry fist can be 7,000 light years away and yet became visible to us 3,700 years ago. Surely the light from the supernova didn't break its own speed limit, did it? :?
The supernova popped 10,700 years ago, but its light only arrived at Earth 3,700 years ago, as a bright flash in the sky, before expanding in size and dwindling in brightness to the remnant we detect today, mainly outside the visible spectrum.

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by lmpr8r » Fri Sep 12, 2014 1:47 pm

I like how some of the objects are named with a "common name". Does supernova remnant Puppis A have a common name? If not, I recommend "The Fist". At least from the vantage point shown and until the gasses and dust filaments drift into another configuration, it does look like a defiantly/angrily clenched hand.

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by jsmunroe » Fri Sep 12, 2014 1:58 pm

User loser wrote:Like the fist of an angry god!
Or a fist bump. Why do we always make gods angry? Maybe they just want props. :p

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Chris Peterson » Fri Sep 12, 2014 2:03 pm

Anna Phylaxis wrote:I don't understand how that angry fist can be 7,000 light years away and yet became visible to us 3,700 years ago. Surely the light from the supernova didn't break its own speed limit, did it? :?
It doesn't matter when it "really" happened. There's always an error in our knowledge of distance, and it would be silly to always be changing our time as our understanding of distance changed.

In physics we almost always time events by when they are observed. This is particularly true with astronomical observations.
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by geckzilla » Fri Sep 12, 2014 4:46 pm

jsmunroe wrote:
User loser wrote:Like the fist of an angry god!
Or a fist bump. Why do we always make gods angry? Maybe they just want props. :p
What makes gods have hands at all? A lack of imagination. :wink:
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by FloridaMike » Fri Sep 12, 2014 10:14 pm

I dub thee the "Fist Bump Nebula" ... HA!
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Nitpicker » Fri Sep 12, 2014 10:24 pm

Given its place in Puppis (the poop deck of Argo Navis), what about Jason's Fist or Argonaut's Fist?

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by ta152h0 » Sat Sep 13, 2014 4:10 am

this looks like a grape pod. Did this thing explode all at once, or was this a summation of a bunch of explosions ?
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Guest » Sun Sep 14, 2014 12:45 pm

NCTOM wrote:What would be the impact of these massive shock waves on nearby star systems, say within twenty light years?
The spread of the gas at that velocity, 180LY in 3700y, is fast and although tenuous it must cause disruption to the solar wind of nearby stars (out to 20 - 50 - 100LY ???) with the consequences for any life on planets around those stars. Are there any stars within a 100LY from us likely to go supernova?

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Chris Peterson » Sun Sep 14, 2014 1:22 pm

Guest wrote:The spread of the gas at that velocity, 180LY in 3700y, is fast and although tenuous it must cause disruption to the solar wind of nearby stars (out to 20 - 50 - 100LY ???) with the consequences for any life on planets around those stars. Are there any stars within a 100LY from us likely to go supernova?
Why would you expect some interaction with a star's solar wind to have any consequences for life around a planet?

The radiation created by a nearby supernova could certainly represent a problem. The actual material, however, probably not.
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by ta152h0 » Sun Sep 14, 2014 3:31 pm

how far does " nearby " have to be to not be " nearby " anymore ?
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Ann » Sun Sep 14, 2014 4:14 pm

ta152h0 wrote:how far does " nearby " have to be to not be " nearby " anymore ?
Well, that depends.

Since the approximate radius of the Milky Way is about 50,000 light-years, a supernova 7,000 light-years away is pretty nearby.

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by Chris Peterson » Sun Sep 14, 2014 4:21 pm

ta152h0 wrote:how far does " nearby " have to be to not be " nearby " anymore ?
If you're talking about the Earth, a supernova within about 100 ly is near enough that its gamma emissions will have some impact on life (mostly through indirect mechanisms like modification of the ozone layer). Such events have occurred several times since complex life developed on Earth, and probably influenced life's evolutionary path.

On planets without thick atmospheres, or with smaller magnetic fields, the critical distance could be somewhat farther. Also, a farther event which had a jet axis aligned with the Earth (or other planet) could affect life.

There are currently no supernova candidates closer than 100 ly.
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by NCTOM » Mon Sep 15, 2014 11:41 am

Thanks for the responses. Always educational.

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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)

Post by starsurfer » Mon Sep 15, 2014 12:09 pm

Ann wrote:
ta152h0 wrote:how far does " nearby " have to be to not be " nearby " anymore ?
Well, that depends.

Since the approximate radius of the Milky Way is about 50,000 light-years, a supernova 7,000 light-years away is pretty nearby.

Ann
I thought the radius of the Milky Way was approximately 100,000 light years?