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APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 4:06 am
by APOD Robot
Image IC 59 and IC 63 in Cassiopeia

Explanation: These bright rims and flowing shapes suggest to some melting ice cream on a cosmic scale. Looking toward the constellation Cassiopeia, the colorful (zoomable) skyscape features the swept back, comet-shaped clouds IC 59 (left) and IC 63. About 600 light-years distant, the clouds aren't actually melting, but they are slowly dissipating under the influence of ionizing ultraviolet radiation from hot,luminous star gamma Cass. Gamma Cass is physically located only 3 to 4 light-years from the nebulae, just off the upper right edge of the frame. In fact, slightly closer to gamma Cass, IC 63 is dominated by red H-alpha light emitted as the ionized hydrogen atoms recombine with electrons. Farther from the star, IC 59 shows proportionally less H-alpha emission but more of the characteristic blue tint of dust reflected star light. The field of view spans about 1 degree or 10 light-years at the estimated distance of gamma Cass and friends.

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Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 4:14 am
by RFW
The hydrogen alpha line is not due to recombination per se. In fact it's the lowest energy electronic transition in a hydrogen atom.

The text isn't wrong in the worst sense, but it's certainly misleading to readers not familiar with the atomic spectrum of hydrogen.

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 4:24 am
by bactame
Zounds...the image downloaded is about 42 megabytes. After trying to download it several time Irfanview seemed to be able to digest it.

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 4:27 am
by Chris Peterson
RFW wrote:The hydrogen alpha line is not due to recombination per se. In fact it's the lowest energy electronic transition in a hydrogen atom.

The text isn't wrong in the worst sense, but it's certainly misleading to readers not familiar with the atomic spectrum of hydrogen.
The hydrogen alpha emission occurs because the hydrogen is ionized, and when it recombines with a free electron, there is about a 50% chance that the electron will be in the n=3 state, which will then decay to n=2 and produce a photon of the hydrogen alpha wavelength. So as it is produced in interstellar hydrogen clouds, the hydrogen alpha line is very much the product of true recombination.

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 5:02 am
by neufer
RFW wrote:
The hydrogen alpha line is not due to recombination per se. In fact it's the lowest energy electronic transition in a hydrogen atom.

The text isn't wrong in the worst sense, but it's certainly misleading to readers not familiar with the atomic spectrum of hydrogen.
When fate hands us Lyman-a, let's try to make Lymanade.

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 5:10 am
by Chris Peterson
neufer wrote:When fate hands us Lyman-a, let's try to make Lymanade.
Or in the case of the emissions recorded here, a Balmer of Gilead?

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 12:10 pm
by neufer
Chris Peterson wrote:
neufer wrote:
When fate hands us Lyman-a, let's try to make Lymanade.
Or in the case of the emissions recorded here, a Balmer of Gilead?
  • "Prophet!" said I, "thing of evil! - prophet still, if bird or devil! -
    Whether Tempter sent, or whether tempest tossed thee here ashore,
    Desolate yet all undaunted, on this desert land enchanted -
    On this home by horror haunted- tell me truly, I implore -
    Is there - is there balm in Gilead? - tell me - tell me, I implore!"
    Quoth the Raven, "Nevermore."
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<<“Treacle Bible”: (Beck's Bible): In the 1549 edition of the Great Bible, Jeremiah 8:22 was translated “Is there no tryacle [treacle] in Gilead?” Modern translations usually have "balm" or "medicine" instead. "Treacle" could mean "a cure-all" as well as "molasses.">>
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_Finnegans Wake_ -- "Bigamy Bob and his old Shanvocht! The Blackfriars treacle plaster outrage be liddled!"
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http://www.alice-in-wonderland.net/alice5.html

1. Origins of Alice's Adventures in Wonderland

<<The Dormouse may have been modelled after Dante Gabriel Rossetti’s pet wombat, which had a habit of sleeping on the table. Carroll knew the Rosetti’s and occasionally visited them. At the tea party, the Dormouse mentiones a treacle well. The idea of the treacle well originated from of the legend of St. Frideswide, a local princess. I'll quote a part of the informative paper: "This story of the well sounds like a piece of complete nonsense on the part of Dodgson, however it is, of course, complete logical, for one must always remember that when the story of Alice was first told, Dodgson was telling the story to a 10 year old girl. In order to keep her attention he had to talk about things that she knew and understood, as in the case of the treacle well. The Frideswide Window tells the story of St. Frideswide and her flight from Prince Algar. [...] Alice Liddell witnessed both the making and the installation of the window and was also familiar with the story of St. Frideswide. [...] The right hand of the window depicts the scene of Frideswide together with old women drawing water from a well, this water was then used by Frideswide to cure illness. This well still exists today (at St. Margaret's Church, Binsey) and has always been known as a treacle well. The word treacle is an Anglo-Saxon word which means 'cure all' and this explains why the sisters at the bottom of the well were very unwell - had they been well then they would have had no need to go there in the first place. It is known that Dodgson and Alice had visited the well several times and there is little doubt that it was the inspiration for the story told by the Dormouse."

The names of the three little sisters in the Treacle Well (Elsie Lacie and Tillie) also refer to the names of the three Liddell sisters. Elsie originated from the initials of Lorina Charlotte, Lacie is a transformation of Alice, and Tillie was short for Matilda, a name given to Edith by her sisters.
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'Once upon a time there were three little sisters,' the Dormouse began in a great hurry; 'and their names were Elsie, Lacie, and Tillie; and they lived at the bottom of a well--'

'What did they live on?' said Alice, who always took a great interest in questions of eating and drinking.

'They lived on treacle,' said the Dormouse, after thinking a minute or two.

'They couldn't have done that, you know,' Alice gently remarked; 'they'd have been ill.'

'So they were,' said the Dormouse; ' very ill.'

Alice tried to fancy to herself what such an extraordinary ways of living would be like, but it puzzled her too much, so she went on: 'But why did they live at the bottom of a well?'

'Take some more tea,' the March Hare said to Alice, very earnestly.

'I've had nothing yet,' Alice replied in an offended tone, 'so I can't take more.'

'You mean you can't take less ,' said the Hatter: 'it's very easy to take more than nothing.'

'Nobody asked your opinion,' said Alice.

'Who's making personal remarks now?' the Hatter asked triumphantly.

Alice did not quite know what to say to this: so she helped herself to some tea and bread-and-butter, and then turned to the Dormouse, and repeated her question. 'Why did they live at the bottom of a well?'

The Dormouse again took a minute or two to think about it, and then said, 'It was a treacle-well.'

'There's no such thing!' Alice was beginning very angrily, but the Hatter and the March Hare went 'Sh! sh!' and the Dormouse sulkily remarked, 'If you can't be civil, you'd better finish the story for yourself.'

'No, please go on!' Alice said very humbly; 'I won't interrupt again. I dare say there may be one .'

'One, indeed!' said the Dormouse indignantly. However, he consented to go on. 'And so these three little sisters--they were learning to draw, you know--'

'What did they draw?' said Alice, quite forgetting her promise.

'Treacle,' said the Dormouse, without considering at all this time.

'I want a clean cup,' interrupted the Hatter: 'let's all move one place on.'

He moved on as he spoke, and the Dormouse followed him: the March Hare moved into the Dormouse's place, and Alice rather unwillingly took the place of the March Hare. The Hatter was the only one who got any advantage from the change: and Alice was a good deal worse off than before, as the March Hare had just upset the milk-jug into his plate.

Alice did not wish to offend the Dormouse again, so she began very cautiously: 'But I don't understand. Where did they draw the treacle from?'

'You can draw water out of a water-well,' said the Hatter; 'so I should think you could draw treacle out of a treacle-well--eh, stupid?'

'But they were in the well,' Alice said to the Dormouse, not choosing to notice this last remark.

'Of course they were', said the Dormouse; '--well in.'

This answer so confused poor Alice, that she let the Dormouse go on for some time without interrupting it.

'They were learning to draw,' the Dormouse went on, yawning and rubbing its eyes, for it was getting very sleepy; 'and they drew all manner of things--everything that begins with an M--'

'Why with an M?' said Alice.

'Why not?' said the March Hare.
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Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 1:02 pm
by orin stepanek
IC 63 could have been used for a ghost picture on Halloween! :mrgreen:

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 2:04 pm
by neufer
orin stepanek wrote:
IC 63 could have been used for a ghost picture on Halloween! :mrgreen:
  • IC dead people.

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 2:09 pm
by Beyond
neufer wrote:
orin stepanek wrote:
IC 63 could have been used for a ghost picture on Halloween! :mrgreen:
  • IC dead people.
U2 :?:

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 3:08 pm
by drollere
wow ... you mean there is actually a nebula without a cutsie name attached? you know, the wizard nebula? the heart and soul nebula? the owl nebula? the eskimo nebula? is that even possible?

someone has to glom onto this prize bit of unnamed celestial real estate and slap a stupid "looks like a camel weasel whale" moniker on it! it can't just hang out there without a cartoon identity!

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 3:36 pm
by peterbradford
neufer wrote:
orin stepanek wrote:
IC 63 could have been used for a ghost picture on Halloween! :mrgreen:
  • IC dead people.
Ouch!

I think it should be named the Dumbo Nebula...

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 4:06 pm
by rstevenson
How 'bout "IC Nuttin' But Nebula"?

Rob

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 6:55 pm
by Ann
'They were learning to draw,' the Dormouse went on, yawning and rubbing its eyes, for it was getting very sleepy; 'and they drew all manner of things--everything that begins with an M--'

'Why with an M?' said Alice.

'Why not?' said the March Hare.
Image
M theory!!! :D



So it wasn't treacle, but string. Or sticky toffee and banana pudding.


Yummy!!! :D






Ann

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 7:07 pm
by Ann
drollere wrote:wow ... you mean there is actually a nebula without a cutsie name attached? you know, the wizard nebula? the heart and soul nebula? the owl nebula? the eskimo nebula? is that even possible?
Hey, the lovely blue star responsible for these nebulae hasn't even got a name apart from "Gamma Cas"! Even though it is a second magnitude star! Even though it is prominently situated in one of the most recognizable constellations in the sky, the "W" of Cassiopeia! Even though all the other stars of that "W" have names, including Delta Cas (Ruchbah) and Epsilon Cas (Segin), even though Delta and Epsilon are fainter than Gamma Cas!

Gamma Cas is a very interesting star all in itself. It is a rare B0 star, whose temperature is around 30,000 Kelvin. It is also a very bright star, around 3,250 times the Sun in visual light (and much, much brighter than that in ultraviolet light.) Gamma Cas a whopper, and it is a minor astro-scandal that it hasn't got a proper name of its own!

But that is a great APOD! These two nebulae are the "babies" of Gamma Cas, or at least they almost certainly formed when Gamma Cas had one of its outbursts and ejected blobs of gas, which it subsequently ionized and lit up! :D

Ann

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 8:05 pm
by Donnageddon
How 'bout "Gamma Cas Elliot"?

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 8:13 pm
by Case
Ann wrote:The lovely blue star responsible for these nebulae hasn't even got a name apart from "Gamma Cas"! Even though it is a second magnitude star! Even though it is prominently situated in one of the most recognizable constellations in the sky, the "W" of Cassiopeia! Even though all the other stars of that "W" have names, including Delta Cas (Ruchbah) and Epsilon Cas (Segin), even though Delta and Epsilon are fainter than Gamma Cas!
http://en.wikipedia.org/wiki/Gamma_Cassiopeiae:
“Although it is a fairly bright star (2.15m), it has no traditional Arabic or Latin name. In Chinese, however, it has the name ‘Tsih’, derived from the word 策 (cè), meaning “the whip”. [...] American astronaut Virgil Ivan "Gus" Grissom nicknamed the star ‘Navi’ after his own middle name spelled backwards. The star was used as an easily identifiable navigational reference point during space missions.”

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 9:04 pm
by NoelC
This is very pretty, though for my tastes a hair too much star reduction has been done in the processing. Some of the small stars that are very close together almost seem to have little "webs" between them, which can happen with the use of the Minimum filter (especially several times). That said, however, this is pretty much a non-issue viewing the big image at 50% or smaller, and it's very impressively detailed even at that size.

For those wondering where these nebulae lie with regard to Gamma Cassiopeia, and who may not realize the blue glow near the top of this image is (mostly) flare from the star...
Gamma Cass
Gamma Cass
-Noel

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 9:43 pm
by orin stepanek
Beyond wrote:
neufer wrote:
orin stepanek wrote:
IC 63 could have been used for a ghost picture on Halloween! :mrgreen:
  • IC dead people.
U2 :?:
I don't see any dead people; just a ghost! I know; I know; a ghost is dead people; but isn't a ghost a live spirit? Hmmmm!

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Thu Nov 03, 2011 11:36 pm
by katy
i think its a ghost for halloween :P :ssmile:

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Fri Nov 04, 2011 12:49 am
by katy
]I think the object in the left looks like the father of the little mermaid the KING TRITON!in the movie little mermaid!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! what do you guys think?????????????????????????????????????????????????????? :D :D

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Sat Nov 05, 2011 7:43 am
by MARK P
FORGIVE ME BUT YOU HAVE GOT THE COMEDIC CREATIVE JUCIES FLOWING, IC 59 AND IC63 NOV 3 SHOULD BE CALLED......GREGG ALLMAN RIDING ON BIG BIRDS NECK WHILE BEING ATTACKED BY A GIANT MOSQUITO...GOOD NIGHT, DONT FORGET TO TIP YOUR WATRESS.

Re: APOD: IC 59 and IC 63 in Cassiopeia (2011 Nov 03)

Posted: Wed Nov 09, 2011 4:35 am
by Guest
MARK P wrote: FORGIVE ME BUT YOU HAVE GOT THE COMEDIC CREATIVE JUCIES FLOWING, IC 59 AND IC63 NOV 3 SHOULD BE CALLED......GREGG ALLMAN RIDING ON BIG BIRDS NECK WHILE BEING ATTACKED BY A GIANT MOSQUITO...GOOD NIGHT, DONT FORGET TO TIP YOUR WATRESS.
:| :| :| :| :| :| :| :| :| :| NOT TRUE! SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSOOOOOOOOOOOOOOOOOOOOOOOOOOOORRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRYYYYYYYYYYYYYYYYYYYYYYYYYYYY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!