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APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 4:11 am
by APOD Robot
The Large Cloud of Magellan
Explanation: The 16th century Portuguese navigator
Ferdinand Magellan and his crew had plenty of time to study the southern sky during the
first circumnavigation of planet Earth. As a result, two fuzzy cloud-like objects easily visible to southern hemisphere
skygazers are known as the
Clouds of Magellan, now understood to be satellite galaxies of our much larger, spiral Milky Way galaxy. About 160,000 light-years distant in the constellation
Dorado, the
Large Magellanic Cloud (LMC) is seen here in a remarkably deep, colorful, and annotated
composite image. Spanning about 15,000 light-years or so, it is the most massive of the Milky Way's
satellite galaxies and is the home of the
closest supernova in modern times,
SN 1987A. The prominent patch just left of center is 30 Doradus, also known as the magnificent
Tarantula Nebula, is a giant
star-forming region about 1,000
light-years across.
[/b]
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 4:23 am
by Beyond
Whatta BIG APOD picture!! I suppose it has to be to fit everything in. There's a lotta stuff there. Even a very big Tarantula. EEK
But I'm wondering if the Mu Men are friendly or not?
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 4:38 am
by Ann
Yes! I was hoping that Ferdinand was Magellan and that the "Ferdinand's Fuzzy" that yesterday's teaser spoke of would turn out to be one of the Magellanic Clouds.
This is a superior image. And the LMC is a treasure trove of galactic goodies indeed, and this image does them wonderful justice.
Ann
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 5:43 am
by StarTrailer@3ap.org
can anyone tell me how large the field of view in this image is, please?
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 8:59 am
by MargaritaMc
This is a beautiful image - but the annotations don't have my favourite Hodges!
http://asterisk.apod.com/viewtopic.php? ... 00#p199733
To be fair - the image would have to be far too large to be an Apod to include all the amazing detail of the image found by Ann that is linked from the Quiz thread topic above...
Margarita
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 10:09 am
by starsurfer
When I saw yesterday's clue, I knew it was this amazing image by Lorenzo and co., simply stunning!! The LMC is one of my favourite southern objects and I would love to be able to see it in the night sky in Chile or some other remote place!
There's still a lot of mystery about the clouds, they might not actually be satellites of the Milky Way and might be interlopers that were captured a long time ago. I think there are a few papers about this theory but I don't have time to find them now.
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 10:11 am
by starsurfer
MargaritaMc wrote:This is a beautiful image - but the annotations don't have my favourite Hodges!
http://asterisk.apod.com/viewtopic.php? ... 00#p199733
To be fair - the image would have to be far too large to be an Apod to include all the amazing detail of the image found by Ann that is linked from the Quiz thread topic above...
Margarita
The Hodge globulars are highlighted in this labeled version of a mosaic by Rob Gendler:
http://www.robgendlerastropics.com/LMCmosaic.html
Observing with a telescope, you could get lost for hours in the maze of clusters and nebulae!! There's hundreds of things that have never been imaged in a closeup long focal length image.
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 10:59 am
by MargaritaMc
starsurfer wrote:MargaritaMc wrote:This is a beautiful image - but the annotations don't have my favourite Hodges!
http://asterisk.apod.com/viewtopic.php? ... 00#p199733
To be fair - the image would have to be far too large to be an Apod to include all the amazing detail of the image found by Ann that is linked from the Quiz thread topic above...
Margarita
The Hodge globulars are highlighted in this labeled version of a mosaic by Rob Gendler:
http://www.robgendlerastropics.com/LMCmosaic.html
Observing with a telescope, you could get lost for hours in the maze of clusters and nebulae!! There's hundreds of things that have never been imaged in a closeup long focal length image.
Yes! That's the labeled image that Ann gave in what I (above) called the Quiz thread! It
is a splendid piece of work, isn't it? I got lost in it for ages.
I didn't know what the Hodge catalogue was, so
set a puzzle about it rather than simply ask a direct question on the forum!
Another catalogue that I've been unable to discover is the one that gives several objects in the LMC the 'name' DEM L followed by a number.
I've web searched and found
this article that studies them,but it gives no clue about
who or what gave rise to the DEM acronym.
The nearest possibility that I came across was
Differential Emission Measures.
Has
anyone any information about this category in the LMC?
Margarita
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 12:40 pm
by Boomer12k
Awesome....thanks for the Annotation as well.
:---[===] *
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 1:08 pm
by Beyond
MargaritaMc wrote:
Another catalogue that I've been unable to discover is the one that gives several objects in the LMC the 'name' DEM L followed by a number.
I've web searched and found
this article that studies them,but it gives no clue about
who or what gave rise to the DEM acronym.
The nearest possibility that I came across was
Differential Emission Measures.
Has
anyone any information about this category in the LMC?
Margarita
I found this acronym website
http://www.acronymfinder.com but it doesn't have DEM L. I surmise that the "L" stands for log.
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 1:11 pm
by NGC3314
MargaritaMc wrote:Another catalogue that I've been unable to discover is the one that gives several objects in the LMC the 'name'
DEM L followed by a number.
I've web searched and found
this article that studies them,but it gives no clue about
who or what gave rise to the DEM acronym.
Got it: the source for the DEM numbers is
this paper by Davies, Elliott, and Meaburn.
The nebular complexes of the large and small Magellanic Clouds
Long exposures of the complexes of ionized hydrogen in both the LMC and SMC have been taken with the 48-in. SRC Schmidt camera through a H-alpha + forbidden NII interference filter of 100-A bandwidth. These plates and identifying charts are presented in a form in which little information is lost. A catalog of many individual emission regions in both these galaxies is also compiled. The relationships between the nebulosities and OB associations as well as between 21-cm neutral hydrogen emission and continuum radio emission are discussed, and a number of supernova-remnant candidates are listed for further study.
The scanned PDF of the full article isn't too bad in retaining visibility of the objects - they have a bunch of map-like sketches as well to distinguish which one is which.
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 3:46 pm
by ta152h0
Very nice and you can always projected on a big screen at sports stadiums, during night games. Now that would be cool. Like Mr Stafford's song, Wildwood weed , " take a trip and never leave the ground "
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 5:06 pm
by MargaritaMc
Beyond wrote:MargaritaMc wrote:
Another catalogue that I've been unable to discover is the one that gives several objects in the LMC the 'name' DEM L followed by a number.
I've web searched and found
this article that studies them,but it gives no clue about
who or what gave rise to the DEM acronym.
The nearest possibility that I came across was
Differential Emission Measures.
Has
anyone any information about this category in the LMC?
Margarita
I found this acronym website
http://www.acronymfinder.com but it doesn't have DEM L. I surmise that the "L" stands for log.
Beyond - ¡That's the acronym website that I looked up and found "Differential Emission Measures"
The thought that the L stands for log is a possibility - but WHO or WHERE created this list of astronomical objects? What is the rational for the list?
The use of unexplained acronyms in astronomy drives me totally batty !
Ooh, I feel better having got that off my chest!
Back to studying the spectra of stars...
....
PS. Later edit: THANK YOU "NGC 3324"!
I've just properly read your post - and I finally see! The DEM =
Davies,
Elliot and
Meaburn.
Margarita
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 6:48 pm
by Beyond
So then... DEM l, would be the Davies, Elliot and Meaburn. List. Now
that wasn't so hard... was it
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Tue May 28, 2013 7:35 pm
by MargaritaMc
Beyond wrote:So then... DEM l, would be the Davies, Elliot and Meaburn. List. Now
that wasn't so hard... was it
You know what I'm like, Beyond - dashing around so fast that I don't stop to look properly...
Margarita
PS. Later edit - the 'L' stands for
Large and 'S' stands for
Small,
So DEM L73 is a nebular complex in the LARGE Magellanic Cloud studied by D, E and M.
And DEM S4 will be ditto in the SMALL Magellanic Cloud.
Isn't it simple, once you know?
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Wed May 29, 2013 9:05 pm
by starsurfer
MargaritaMc wrote:starsurfer wrote:MargaritaMc wrote:This is a beautiful image - but the annotations don't have my favourite Hodges!
http://asterisk.apod.com/viewtopic.php? ... 00#p199733
To be fair - the image would have to be far too large to be an Apod to include all the amazing detail of the image found by Ann that is linked from the Quiz thread topic above...
Margarita
The Hodge globulars are highlighted in this labeled version of a mosaic by Rob Gendler:
http://www.robgendlerastropics.com/LMCmosaic.html
Observing with a telescope, you could get lost for hours in the maze of clusters and nebulae!! There's hundreds of things that have never been imaged in a closeup long focal length image.
Yes! That's the labeled image that Ann gave in what I (above) called the Quiz thread! It
is a splendid piece of work, isn't it? I got lost in it for ages.
I didn't know what the Hodge catalogue was, so
set a puzzle about it rather than simply ask a direct question on the forum!
Another catalogue that I've been unable to discover is the one that gives several objects in the LMC the 'name' DEM L followed by a number.
I've web searched and found
this article that studies them,but it gives no clue about
who or what gave rise to the DEM acronym.
The nearest possibility that I came across was
Differential Emission Measures.
Has
anyone any information about this category in the LMC?
Margarita
Hey Margarita which Quiz thread are you taking about?
The DEM catalogue was publised in 1976 and the three letters are for the three astronomers who compiled it, I suppose you know them now. As well as emission nebuae, some of the DEM nebulae are Wolf Rayet nebulae such as DEM L174 and DEM L315 and some are supernova remnants, most notably DEM 316.
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Wed May 29, 2013 9:53 pm
by MargaritaMc
Hi and thanks for the info, starsurfer! Yes, we had got it sorted - but more detailed information is always gratefully received!
The "Quiz Thread" is actually entitled "Where Am I?"
This is where Moonlady began it and sets out what it is about
http://asterisk.apod.com/viewtopic.php?f=23&t=30813
And this is where I made a puzzle about Paul W. Hodge's catalogue
http://asterisk.apod.com/viewtopic.php? ... 00#p199732
It's still ongoing and I've posted a puzzle today! Do join in - it is good fun, and a jokey way of learning about astronomical objects.
Margarita
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Sat Jun 01, 2013 9:53 pm
by Lorenzo Comolli
Hei, thank you very much for all the comments! I, and my co-authors, are very grateful.
can anyone tell me how large the field of view in this image is, please?
According to Astrometry.net it is 7.67 x 7.55 deg
http://nova.astrometry.net/user_images/53443#annotated
Lorenzo
Re: APOD: The Large Cloud of Magellan (2013 May 28)
Posted: Sun Jun 02, 2013 7:47 am
by MargaritaMc
Lorenzo Comolli wrote:Hei, thank you very much for all the comments! I, and my co-authors, are very grateful.
can anyone tell me how large the field of view in this image is, please?
According to Astrometry.net it is 7.67 x 7.55 deg
http://nova.astrometry.net/user_images/53443#annotated
Lorenzo
And thank YOU, Lorenzo, for the splendid image
and for the Astrometry.net link. Others here probably already know of it, but I am still relatively new to astronomy and am highly grateful for every extra source of information
Best wishes
Margarita