|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
ASTRO: M3 Have I lost my mind imaging something big and bright?
In organizing my hard drive a few months ago I noticed that somehow I'd
not managed to image M3 with the 14" scope. That had to be corrected. This is the result. M3 is a globular star cluster in Canes Venatici. It is considered one of the showpiece globular star clusters. At about 34 thousand light years it is a rather distant one to be so famous. It contains a large number of variable (mostly RR Lyrae) stars. The cluster is quite blue due to the large number of "Blue Stragglers" that it contains. It is thought that most globular clusters formed at about the same time as our galaxy, 10 billion years ago, and that its stars all formed at that time. Yet these "Blue Straglers" appear to be young stars as stars of their color would live very short lives compared to the 10 billion year age of the cluster. There are several explanations of how these come to be. One is the merger of two or more stars, another is one star stripping gas from another raising its mass enough to turn it blue, still another says the outer shell of a helium burning star has been stripped away exposing the super hot blue core. Maybe all are involved. With such closely packed stars it is very difficult to get a good spectrum of these stars which would help to understand this issue. 14" LX200R @ f/10, L=11x5' (to prevent saturation) RGB=2x10', STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#2
|
|||
|
|||
ASTRO: M3 Have I lost my mind imaging something big and bright?
looking good!
I am not at all confident that the blue straggler theory is what accounts for them As it turns out once hydrogen burning has transitioned to helium burning, you get a lot of blue stars the APOD that mentioned the blue stragglers has apparently fostered this tale.... check Joseph Silk's "The Big Bang" to read about the high populations of blue stars in Globs. see this outtake from Silk's book: http://tinyurl.com/m9sbul or this for the direct link http://books.google.com/books?id=TQH...bular+clusters "Rick Johnson" wrote in message ster.com... In organizing my hard drive a few months ago I noticed that somehow I'd not managed to image M3 with the 14" scope. That had to be corrected. This is the result. M3 is a globular star cluster in Canes Venatici. It is considered one of the showpiece globular star clusters. At about 34 thousand light years it is a rather distant one to be so famous. It contains a large number of variable (mostly RR Lyrae) stars. The cluster is quite blue due to the large number of "Blue Stragglers" that it contains. It is thought that most globular clusters formed at about the same time as our galaxy, 10 billion years ago, and that its stars all formed at that time. Yet these "Blue Straglers" appear to be young stars as stars of their color would live very short lives compared to the 10 billion year age of the cluster. There are several explanations of how these come to be. One is the merger of two or more stars, another is one star stripping gas from another raising its mass enough to turn it blue, still another says the outer shell of a helium burning star has been stripped away exposing the super hot blue core. Maybe all are involved. With such closely packed stars it is very difficult to get a good spectrum of these stars which would help to understand this issue. 14" LX200R @ f/10, L=11x5' (to prevent saturation) RGB=2x10', STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#3
|
|||
|
|||
ASTRO: M3 Have I lost my mind imaging something big and bright?
I had that in the back of my mind but when I found the APOD story I went
with it. Mythbusters time but how do they test that. Though a SN would be their biggest bang ever! I have my first clear night in weeks and the sky is 70% covered in Northern Lights. I thought solar activity was dead. I started an image. Back ground was normal 240 on first one. By the 5th it was 30,000! They are mostly featureless. See a faint hint of a few rays but they quickly fade. No color to my eye but the filters say it is strong in green and pretty strong in blue with significant red. Since it ebbs anf flows that is really meaningless. I don't have a digital camera with night sensitivity. Gotta get one! Rick Richard Crisp wrote: looking good! I am not at all confident that the blue straggler theory is what accounts for them As it turns out once hydrogen burning has transitioned to helium burning, you get a lot of blue stars the APOD that mentioned the blue stragglers has apparently fostered this tale.... check Joseph Silk's "The Big Bang" to read about the high populations of blue stars in Globs. see this outtake from Silk's book: http://tinyurl.com/m9sbul or this for the direct link http://books.google.com/books?id=TQH...bular+clusters "Rick Johnson" wrote in message ster.com... In organizing my hard drive a few months ago I noticed that somehow I'd not managed to image M3 with the 14" scope. That had to be corrected. This is the result. M3 is a globular star cluster in Canes Venatici. It is considered one of the showpiece globular star clusters. At about 34 thousand light years it is a rather distant one to be so famous. It contains a large number of variable (mostly RR Lyrae) stars. The cluster is quite blue due to the large number of "Blue Stragglers" that it contains. It is thought that most globular clusters formed at about the same time as our galaxy, 10 billion years ago, and that its stars all formed at that time. Yet these "Blue Straglers" appear to be young stars as stars of their color would live very short lives compared to the 10 billion year age of the cluster. There are several explanations of how these come to be. One is the merger of two or more stars, another is one star stripping gas from another raising its mass enough to turn it blue, still another says the outer shell of a helium burning star has been stripped away exposing the super hot blue core. Maybe all are involved. With such closely packed stars it is very difficult to get a good spectrum of these stars which would help to understand this issue. 14" LX200R @ f/10, L=11x5' (to prevent saturation) RGB=2x10', STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#4
|
|||
|
|||
ASTRO: M3 Have I lost my mind imaging something big and bright?
shouldn't be hard to do stellar spectra to see if they burn helium or
not.... I've not see a good aurora from here in years but we did get some back in 2001... "Rick Johnson" wrote in message ster.com... I had that in the back of my mind but when I found the APOD story I went with it. Mythbusters time but how do they test that. Though a SN would be their biggest bang ever! I have my first clear night in weeks and the sky is 70% covered in Northern Lights. I thought solar activity was dead. I started an image. Back ground was normal 240 on first one. By the 5th it was 30,000! They are mostly featureless. See a faint hint of a few rays but they quickly fade. No color to my eye but the filters say it is strong in green and pretty strong in blue with significant red. Since it ebbs anf flows that is really meaningless. I don't have a digital camera with night sensitivity. Gotta get one! Rick Richard Crisp wrote: looking good! I am not at all confident that the blue straggler theory is what accounts for them As it turns out once hydrogen burning has transitioned to helium burning, you get a lot of blue stars the APOD that mentioned the blue stragglers has apparently fostered this tale.... check Joseph Silk's "The Big Bang" to read about the high populations of blue stars in Globs. see this outtake from Silk's book: http://tinyurl.com/m9sbul or this for the direct link http://books.google.com/books?id=TQH...bular+clusters "Rick Johnson" wrote in message ster.com... In organizing my hard drive a few months ago I noticed that somehow I'd not managed to image M3 with the 14" scope. That had to be corrected. This is the result. M3 is a globular star cluster in Canes Venatici. It is considered one of the showpiece globular star clusters. At about 34 thousand light years it is a rather distant one to be so famous. It contains a large number of variable (mostly RR Lyrae) stars. The cluster is quite blue due to the large number of "Blue Stragglers" that it contains. It is thought that most globular clusters formed at about the same time as our galaxy, 10 billion years ago, and that its stars all formed at that time. Yet these "Blue Straglers" appear to be young stars as stars of their color would live very short lives compared to the 10 billion year age of the cluster. There are several explanations of how these come to be. One is the merger of two or more stars, another is one star stripping gas from another raising its mass enough to turn it blue, still another says the outer shell of a helium burning star has been stripped away exposing the super hot blue core. Maybe all are involved. With such closely packed stars it is very difficult to get a good spectrum of these stars which would help to understand this issue. 14" LX200R @ f/10, L=11x5' (to prevent saturation) RGB=2x10', STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#5
|
|||
|
|||
ASTRO: M3 Have I lost my mind imaging something big and bright?
Very good image Rick. Actually it is a nice change to image something bright
after going for the faint stuff for a while. Stefan "Rick Johnson" schrieb im Newsbeitrag ster.com... In organizing my hard drive a few months ago I noticed that somehow I'd not managed to image M3 with the 14" scope. That had to be corrected. This is the result. M3 is a globular star cluster in Canes Venatici. It is considered one of the showpiece globular star clusters. At about 34 thousand light years it is a rather distant one to be so famous. It contains a large number of variable (mostly RR Lyrae) stars. The cluster is quite blue due to the large number of "Blue Stragglers" that it contains. It is thought that most globular clusters formed at about the same time as our galaxy, 10 billion years ago, and that its stars all formed at that time. Yet these "Blue Straglers" appear to be young stars as stars of their color would live very short lives compared to the 10 billion year age of the cluster. There are several explanations of how these come to be. One is the merger of two or more stars, another is one star stripping gas from another raising its mass enough to turn it blue, still another says the outer shell of a helium burning star has been stripped away exposing the super hot blue core. Maybe all are involved. With such closely packed stars it is very difficult to get a good spectrum of these stars which would help to understand this issue. 14" LX200R @ f/10, L=11x5' (to prevent saturation) RGB=2x10', STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Why Americans Need To Be Dumbed Down Lost: Human Mind Corrupted | http://www.whereisthemoney.org/ | Misc | 0 | November 6th 05 05:35 PM |
Huygens Probe - lost data chain A - what's the situation for imaging? | Billius | Astronomy Misc | 0 | January 15th 05 02:03 AM |
Huygens Probe - lost data chain A - what's the situation for imaging? | Billius | Amateur Astronomy | 0 | January 15th 05 02:03 AM |
Hermes Found 66 Years Later - Long-Lost Object Is A Bright Binary | Ron Baalke | Astronomy Misc | 15 | November 12th 03 04:14 AM |
Hermes Found 66 Years Later - Long-Lost Object Is A Bright Binary | Ron Baalke | Misc | 27 | November 9th 03 11:53 PM |