Structure Of The Milky Way

[zephyr46]

With the recent discovery of a new spiral arm in our galaxy,
and the addition of the Canis Major dwarf galaxy (http://astro.u-strasbg.fr/images_ri/canm-e.html)

http://astro.u-strasbg.fr/images_ri/anim_micro.gif

I thought people might be interested in a reveiw of online resources and discoveries related to the Milky Way

High Velocity clouds in the halo (http://hubblesite.org/newscenter/newsdesk/archive/releases/1993/04/text/)

A new arm for our Galaxy? (http://www.atnf.csiro.au/news/press/spiralarm/)

http://www.nrao.edu/pr/2003/complexh/complexhweb.jpg
Satellite galaxy of the Milky Way orbiting backward around the Galactic center.( Thursday, May 22, 2003) (http://www.nrao.edu/pr/2003/complexh/)
Star Stuff (http://www.starstuff.org/default.asp?cover=/articles/1194.asp)

http://www.space.com/images/h_ring_milkyway_02.jpg
Space.com (http://www.space.com/scienceastronomy/milkyway_ring_030106.html)
SpaceRef.com (http://www.spaceref.com/news/viewnews.html?id=678)

I recently found this newsletter, relating to the Galctic Center

GCNEWS (http://www.aoc.nrao.edu/~gcnews/index.shtml)

Looks Good :)

S2 and the black hole at the center of our galaxy
UT forum (http://www.universetoday.com/forum/index.php?showtopic=1306)
http://www.mpe.mpg.de/www_ir/GC/images/movie2003.gif
Galactic Center Research at MPE (http://www.mpe.mpg.de/www_ir/GC/gc.html)

Comics Gallery (http://subarutelescope.org/Observing/Instruments/COMICS/gallery/index.html)

http://subarutelescope.org/Observing/Instruments/COMICS/gallery/jpg/GC_RGBp_half.gif


Galactic Habitable Zone
http://www.space.com/images/040101_complex_life_01.jpg
Space.com (http://www.space.com/astronotes/astronotes.html)

An interesting new developement in galactic phenomena is the Chimney (http://antwrp.gsfc.nasa.gov/apod/ap000207.html) (APOD)
The W4 Chimney

A good description of what a chimney is (http://www.drao-ofr.hia-iha.nrc-cnrc.gc.ca/outreach/newsletter/news_eng/sep95/chimney.html) :)

Scientific American Article (http://www.sciam.com/print_version.cfm?articleID=0005CD98-18DA-1C6D-84A9809EC588EF21)
http://www.sciam.com/media/inline/0005CD98-18DA-1C6D-84A9809EC588EF21_arch2.jpg
Canadian Galactic Plane Survey (http://www.ras.ucalgary.ca/CGPS/)
W4 Loop (http://www.astro.wisc.edu/wham/papers-dir/w4loop.pdf)

http://antwrp.gsfc.nasa.gov/apod/image/0002/chimney1_cgps.jpg

Solstaion.com (http://solstation.com/x-objects/chimney.htm) have a great sit on our superchimney

http://solstation.com/x-objects/l-bubble.jpg

My Webpage on the Galactic center (http://zephyr46.tripod.com/eaglenebula/id6.html)

Comments ??

[damienpaul]

Very nice information zephyr, I am particularly intrigued about the chimneys...what on earth (pardon the pun) could have caused them?? Are you making a guide for this? That would be totally awesome

[zephyr46]

What? Like a "guide to the galaxy"? Like a lonely planet guide? or "milky way on a buget?
Don't know, hadn't realy thought about it, and this topic seemed to have aroused such little attention, I was waiting for fraiser to cut it because it may have breached copyright or something. ( I in no way claim to know or understand least of all claim responsiblity for any thing above :) ) Just plagued by curiosity.

[antoniseb]

Originally posted by damienpaul@Feb 12 2004, 02:52 AM
I am particularly intrigued about the chimneys...what on earth (pardon the pun) could have caused them?
The chimney is an interesting feature. There's a description of the possible causes on the Astronomy Picture of the Day from 7 Feb 2000. Essentially, it is hot gasses from a hot young cluster, possibly supernovae, possibly just O-type wind.

http://antwrp.gsfc.nasa.gov/apod/ap000207.html

Personally, I really liked the applet showing the stars orbiting the central super-massive black hole.

[zephyr46]

Personally, I really liked the applet showing the stars orbiting the central super-massive black hole.

I think it's an annimated gif, the link for it is immediatly below it.

[zephyr46]

http://www.atnf.csiro.au/news/press/spiralarm/images/spiral_density.gif

A new arm for our galaxy (http://www.atnf.csiro.au/news/press/spiralarm/)

This model got pushed off the first entry, but I think it is important to keep it.

http://zebu.uoregon.edu/~js/ast122/images/hi_spiral.gif

I love this neutral hydrogen map of our galaxy, but I have no idea where it is from!

The Atlas of the Universe (http://anzwers.org/free/universe/milkyway.html)

Has a great history of mapping the milky way.

http://anzwers.org/free/universe/spiralmap.gif

[zephyr46]

Just a short article I have been itching to write.

Bow Shocks

With the discovery of Sedna, orbiting at the edge of our solar system and voyager approarching the heliopause, I thought it worth looking at a couple of Bow Shocks. One towards the Galactic center, one in Orion, and Our own. As per usual, the articles are linked below the images.

http://antwrp.gsfc.nasa.gov/apod/image/0311/bubble_voyager_lab1.jpg

Ours (http://antwrp.gsfc.nasa.gov/apod/ap031120.html)

http://imgsrc.hubblesite.org/hu/db/2002/05/images/a/formats/web.jpg

LL Ori (http://hubblesite.org/newscenter/newsdesk/archive/releases/2002/05/)

http://antwrp.gsfc.nasa.gov/apod/image/0010/gcenter2_gemini.jpg
IRS2 (http://antwrp.gsfc.nasa.gov/apod/ap001017.html)

Like the waves of the bow of a boat. The fist image, our own bow shock, is due to our motion around the center of the galaxy. Somthing I read a while ago was our membership of the Ursa Major Moving Group (http://seds.lpl.arizona.edu/messier/xtra/ngc/uma-cl.html). Any good links to such information muchly arprciated :) . ( oh yeah, YAE!!! , SEDS is back up !!)
Here's an article (http://www.ottawa.rasc.ca/observers/an9803p4.html) with a bit more detail about the suns motion in relation to the Ursa Major moving group and motion in relation to the galactic plane.

PS (april 24)

I have been reading the Iron Sun Thread. And started checking out Geminga.

ESA (http://www.esa.int/export/esaCP/SEMQB4YO4HD_Expanding_1.html#subhead1), suggests that the tails behind Geminga may be a bow shock, visable in the x-ray. (I have deleted the pics as they are slowing down the loading time for the thread, but check em out on the ESA link :) )

[Powerman 5000]

Can anyone direct me to a site with info on black holes of our galaxy?

[antoniseb]

Originally posted by Powerman 5000@Mar 27 2004, 01:09 PM
Can anyone direct me to a site with info on black holes of our galaxy?
Are you looking for a list of current candidates? There is usually some debate in most cases whether the object is a black hole or not.

You'd probably get want you want by looking at the first several sites given in a google search on "List Galactic XRay Sources". This will include things that aren't black holes, but the list is short enough that you'll be easily able to sort out which ones are thought to be black-hole candidates.

Note that this won't list ALL black-holes, because we doubt we've found most of them. We can only easily detect and measure the ones that are in close binaries.

[zephyr46]

300 black hole links, just ignore the freaky ad that takes up the top of the page. (http://www.mysteries-megasite.com/main/bigsearch/blackhole.html)

UT story (http://www.universetoday.com/am/publish/milky_way_dangerous.html?642004). I just had to include this annimated gif from the ESO story.

http://www.eso.org/outreach/press-rel/pr-2004/images/phot-10c-04.gif
ESO story (http://www.eso.org/outreach/press-rel/pr-2004/pr-08-04.html#phot-10a-04),survey of 16000 nearby stars

I think it is about time to pull out the maps

http://spacsun.rice.edu/~twg/gif/widemap.gif

Mapping the LISM (http://spacsun.rice.edu/~twg/lism.html#Overall%20Picture)

and from Star Trek (http://www.stdimension.de/int/Cartography/)

http://www.stdimension.de/Cartography/Source/map_galaxy.jpg

http://www.stdimension.de/Cartography/Source/map_galcore.jpg

http://www.stdimension.de/Cartography/Source/map_real250.jpg

and Finally

http://www.stdimension.de/Cartography/Source/map_real25.jpg

and refer to Mapping the LISM (http://spacsun.rice.edu/~twg/lism.html#Overall%20Picture) for the local bubble in english :)

The maps are taken from the book Guide to the Galaxy (http://www.amazon.com/exec/obidos/ASIN/052145882X/qid%3D952114822/sr%3D1-16/102-0386794-0158543)

if you haven't found it yet, Here (http://www.projectrho.com/smap12.html) is one of the best lists of space maps on the Net !

NBC story about Sagitarius A with black hole links (http://www.msnbc.com/news/135107.asp?cp1=1)

UT Forum (http://www.universetoday.com/forum/index.php?showtopic=2745&st=0&#entry23548) Suns parth around the Sun the galaxy.

UT Forum (http://www.universetoday.com/forum/index.php?showtopic=2779) the Milky Way Disk

[zephyr46]

Worms Chimneys and Fountains (http://www.ru.ac.za/library/theses/1999/jonas/chap_5.pdf) reveiwing the radio continuum

The Large-Scale Magnetic Field Structure of Our Galaxy: (http://www.mpifr-bonn.mpg.de/div/konti/antalya/Session-I.pdf) JL Han

[zephyr46]

I just found the latest edition of the GC Newsletter (http://www.aoc.nrao.edu/~gcnews/index.shtml), and it had this !

http://www.astro.ucla.edu/~jlu/gc/images/orbits_pause.gif

Thought somone might find it interesting.

Also a university course that has a great overveiw of the unveiling of the milky way and our place in it.

Dr. Morgan's Astronomy Course website (http://www.earth.uni.edu/~morgan/astro/) at the Earth Science Department at the University of Northern Iowa (http://www.earth.uni.edu/).

Some may recognise the address, formerly -http://www.earth.uni.edu/astro/cosmos/part4.html

this is because it used to have some great velocity maps of atomic and molecular hydrogen, now sadly gone :(

Anyone looking for such I can only suggest the Harvard - Smithonian Center for Astrophysics (http://cfa-www.harvard.edu/cfa/mmw/index.html).

[zephyr46]

The Galactic Center

http://irastro.jpl.nasa.gov/GalCen/Graphics/galcen_label.jpg
JPL (http://irastro.jpl.nasa.gov/GalCen/galcen.html)

http://www.astro.ucla.edu/~jlu/gc/images/yngStars.gif

http://www.astro.ucla.edu/~jlu/gc/images/gcK_labeled.jpg

Image source (http://www.astro.ucla.edu/~jlu/gc/pictures/index.shtml)

sciencedaily news article 2002-10-03 (http://www.sciencedaily.com/releases/2002/10/021003080626.htm).

http://www.nrl.navy.mil/pao/PressReleases/2003/GC742sized.jpg

http://www.nrl.navy.mil/pao/PressReleases/2003/1-meter-sized.jpg
nrl source (http://www.nrl.navy.mil/pao/pressRelease.php?Y=2003&R=1-03r)

spaceref.com Wednesday, January 08, 2003 (http://www.spaceref.com/news/viewpr.html?pid=10337)

http://rsd-www.nrl.navy.mil/7213/lazio/GC/GC-P-BCD.med.jpg
A Wide-Field, Low-Frequency Image (http://rsd-www.nrl.navy.mil/7213/lazio/GC/) of the galactic center.

antoniseb (http://www.universetoday.com/forum/index.php?showtopic=3026) has posted an interesting article about S2 in 2018 passing Sag A*. It mentions a few different black hole types, the hard physics is lost on me, but if I uinderstand it, there should be a microlensing event?

Well, i am continuing to search for the star names and structure of the Galaxy.

Here is the warped structure Diagram I mentioned in the previous post

http://www.rssd.esa.int/SA-general/Projects/GAIA_files/LATEX2HTML/img76.gif

Extracts from The GAIA Study Report (http://www.rssd.esa.int/SA-general/Projects/GAIA_files/LATEX2HTML/node21.html)

Towards a Gamma ray map (http://www.gamma.mpe-garching.mpg.de/~aws/publications/digel_milkywayconf_BU_poster_v6.pdf) discusses possibilty of a map from the LAT array (completion 2006)

[zephyr46]

:) I think I am going to have to wrap this topic Up, as it takes so long to download as it is.

http://users.skynet.be/sky03361/fotos3/kaart2.JPG
Sagitarius Arm

http://users.skynet.be/sky03361/fotos3/kaart3.JPG
Perseus Arm

From a guide to the Universe (http://users.skynet.be/sky03361/html3/Trip3.html)

I beleive the maps are, again, from the "guide to the galaxy" however there is quite a bit of change in the colour and they have been cropped. Get the book! I wish I could!

Space Today (http://www.spacetoday.org/DeepSpace/Galaxies/MilkyWay/Antimatter.html) - Anti-matter Fountain at the center of our galaxy.

And I can't recommend highly enough (if you have Quicktime!)
The multiwavelength VR veiwers (http://users.erols.com/arendt/dirbe_qtvr/b123_qt.html) in this site.

I have been a fan of Pricilla Frisch since I first started looking for maps of our little corner of the universe, Here is the latest I have found from her.the solar Journey, latest modelling of the Local Bubble and local enviroment of the sun (http://www.cs.indiana.edu/~soljourn/reports/AASJan2002.pdf)

Got the picture ?
Meet the Neighbours (http://www.public.asu.edu/~rjansen/localgroup/localgroup.html)

http://www.astron.nl/wsrt/WSRTproj/PrettyPictures/dwlooh1.jpg
Dwingeloo 1 and 2 (http://www.astron.nl/wsrt/WSRTproj/PrettyPictures/)

See Ya