Comments on: Screaming to the Stars: Quasar Echo’s http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/ Blogging one sidereal day at a time Sat, 13 Mar 2010 18:19:32 -0400 http://wordpress.org/?v=2.8.6 hourly 1 By: phil http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/comment-page-1/#comment-23821 phil Mon, 24 Mar 2008 17:32:07 +0000 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/#comment-23821 what is the temperature of Quauar? what is the temperature of Quauar?

]]> By: Burzycki.org » Astrosphere for September 21st, 2007 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/comment-page-1/#comment-9543 Burzycki.org » Astrosphere for September 21st, 2007 Fri, 28 Sep 2007 06:02:16 +0000 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/#comment-9543 [...] and here's what she thought. New Scientists has a review too. Dr. Pamela Gay covers research about echoes of radiation from quasars being used to study the centres of distant galaxies. Space Law Probe discusses the latest in [...] [...] and here’s what she thought. New Scientists has a review too. Dr. Pamela Gay covers research about echoes of radiation from quasars being used to study the centres of distant galaxies. Space Law Probe discusses the latest in [...]

]]> By: Astrolink [International Edition] » Blog Archive » Astrosphere for September 21st, 2007 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/comment-page-1/#comment-9240 Astrolink [International Edition] » Blog Archive » Astrosphere for September 21st, 2007 Sun, 23 Sep 2007 13:01:36 +0000 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/#comment-9240 [...] Pamela Gay covers research about echoes of radiation from quasars being used to study the centres of distant [...] [...] Pamela Gay covers research about echoes of radiation from quasars being used to study the centres of distant [...]

]]> By: Richard B. Drumm http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/comment-page-1/#comment-9110 Richard B. Drumm Sat, 22 Sep 2007 04:45:35 +0000 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/#comment-9110 I was only parroting what I've read so many times, see the link: http://apod.nasa.gov/apod/ap030402.html A cool animation titled "Light Echo: The Movie" Richard want a cracker, brawwwk! ;-D Misued apostrophe's (LOL) bug me too! Rich I was only parroting what I’ve read so many times, see the link:
http://apod.nasa.gov/apod/ap030402.html
A cool animation titled “Light Echo: The Movie”
Richard want a cracker, brawwwk!
;-D
Misued apostrophe’s (LOL) bug me too!
Rich

]]> By: mcenhillk http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/comment-page-1/#comment-9080 mcenhillk Fri, 21 Sep 2007 20:01:30 +0000 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/#comment-9080 AH! Got it! So the more gas swirling around in different directions, the wider the spectral lines. That makes sense. Thanks AH! Got it!

So the more gas swirling around in different directions, the wider the spectral lines. That makes sense.

Thanks

]]> By: John M. http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/comment-page-1/#comment-9067 John M. Fri, 21 Sep 2007 19:13:43 +0000 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/#comment-9067 That really is fascinating. Thanks for posting this. Not to be a grammar Nazi, but I think that might be "Echos" with no apostrophe. That really is fascinating. Thanks for posting this.

Not to be a grammar Nazi, but I think that might be “Echos” with no apostrophe.

]]> By: Richard B. Drumm http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/comment-page-1/#comment-9046 Richard B. Drumm Fri, 21 Sep 2007 13:55:18 +0000 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/#comment-9046 mcenhillk: We would see a narrow but shifted line if the motion was uniform, but it's chaotic, some moving toward us, some sideways and lastly some moving away. Thus there's a smearing effect on the lines and they broaden. Correct me (as always) if I'm wrong, Pammie... This basically is a lot like the light echo in Monoceros (V838 Mon.) but on a vastly larger scale. Rich mcenhillk:
We would see a narrow but shifted line if the motion was uniform, but it’s chaotic, some moving toward us, some sideways and lastly some moving away. Thus there’s a smearing effect on the lines and they broaden.
Correct me (as always) if I’m wrong, Pammie…
This basically is a lot like the light echo in Monoceros (V838 Mon.) but on a vastly larger scale.
Rich

]]> By: mcenhillk http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/comment-page-1/#comment-9042 mcenhillk Fri, 21 Sep 2007 13:10:12 +0000 http://www.starstryder.com/2007/09/21/screaming-to-the-stars-quasar-echos/#comment-9042 "Areas where the gas is cool and calm will emit narrow lines. Clouds that have high velocities emit broader lines." Ok, this one has my brain hurting. I understand the calm gas cloud's spectral behavior but I don't see the connection between cloud speed and spectral line width. If the cloud was moving at speed toward or away from us, we would see a dopler shift but wouldn't the line width still be the same? “Areas where the gas is cool and calm will emit narrow lines. Clouds that have high velocities emit broader lines.”

Ok, this one has my brain hurting. I understand the calm gas cloud’s spectral behavior but I don’t see the connection between cloud speed and spectral line width. If the cloud was moving at speed toward or away from us, we would see a dopler shift but wouldn’t the line width still be the same?

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