Comments on: Ghost of Summer – M20 by Toni Heidemann

By: SEEMA RANI CHAUHAN

SEEMA RANI CHAUHAN — Sat, 23 Aug 2008 04:52:36 +0000

is there is a ghost?plz tell me im so afraid

By: LLDIAZ

LLDIAZ — Tue, 12 Aug 2008 19:01:05 +0000

looks like God farted!

By: Aodhhan

Aodhhan — Tue, 12 Aug 2008 18:49:59 +0000

Not sure if this is F. Yusef-Zadeh's most recent work on this subject, but it did answer quite a few questions which were spinning in my head from this. Most notably the determination of the neutral material being photoionized by the type O star; and how this would react with "cold" areas in its vicinity.

Go to: http://handle.dtic.mil/100.2/ADA464407
It's in .pdf format

Happy reading.

By: Tammy Plotner

Tammy Plotner — Tue, 12 Aug 2008 18:39:01 +0000

thanks, guys!

there's lots of weird things going on in there. from what i can gather, the particles in the northern lobe aren't more dense – that's not why it's brighter – they have a higher albedo! isn't that strange? even more strange, the high albedo is caused by the chemical composition coming off very specific stars in the region.

needless to say, this article could have been 10 pages long and not even scratched the surface of all that's going on in there. maybe mr. herschel was sharper than we thought…

By: Chris

Chris — Tue, 12 Aug 2008 18:37:39 +0000

Nice picture and great info. The nebula looks like the front end of a worm from Dune.

By: Tom

Tom — Tue, 12 Aug 2008 17:32:09 +0000

I gotta try that one with my H-alpha filter. I'm kind of limited this week with the full moon. Nice job!

Tom

By: Jon Hanford

Jon Hanford — Tue, 12 Aug 2008 16:46:36 +0000

Tammy, thanks for a very informative article on a well known object to amateur astronomers. I really enjoyed the emphasis on little known research on this object outside of the professional astronomy world. I hope to see more articles like this in the future. The link to Toni Heidemann's astrogallery is also welcome, as I collect websites of amateurs doing pro-grade imaging of celestial objects (incl. his shot of recently featured NGC 4625 & NGC 4618!). Keep up the good work.

By: Tammy Plotner

Tammy Plotner — Tue, 12 Aug 2008 16:01:44 +0000

pulsar PSR 1801–2306 and W28 OH (1720 MHz) maser! … wavelength = 3.6 and 6 cm

By: Aodhhan

Aodhhan — Tue, 12 Aug 2008 15:10:53 +0000

(("Radio continuum VLA observations of this nebula show free-free emission from three stellar sources lying close to the O7 V star at the center of the nebula.))

Any idea what they may be? Quasars? Pre-requisite stages of something like an active galactic nuclei… a future galaxy; Just waiting for that type O star to finish life?

What is the spectrum of wavelengths coming from it?