Ultrasharp Images Of A Sunspot |
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Ultrasharp Images Of A Sunspot |
 Oct 6 2005, 08:15 AM
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#1
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 Member  Group: Members Posts: 531 Joined: 24-August 05 Member No.: 471  |
New optics produce ultrasharp images of sunspot
News article: http://spaceflightnow.com/news/n0510/05sunspots/ More images: http://www.nso.edu/press/DALSA/ NOAA 0805: 
-------------------- - blue_scape / Nico -
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Oct 6 2005, 09:03 AM
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#2
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Senior Member Group: Moderator Posts: 4279 Joined: 19-April 05 From: .br at .es Member No.: 253 |
Sunspot, that's you?
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Oct 6 2005, 09:43 AM
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#3
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Member Group: Members Posts: 531 Joined: 24-August 05 Member No.: 471 |
-------------------- - blue_scape / Nico -
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| Guest_Myran_* |
Oct 6 2005, 01:17 PM
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#4
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Guests |
*Pust on the doc coat* Hmmmm, dunno what it is, but I think some penicillin could cure it!
Really amazingly sharp image though. |
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Oct 7 2005, 06:31 AM
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#5
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 Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Hey, I can see inside the Sunspot (hotspots?)
Attached thumbnail(s)
-------------------- I always think before posting! - Marco -
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Oct 7 2005, 07:02 AM
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#6
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Member Group: Members Posts: 531 Joined: 24-August 05 Member No.: 471 |
Abyss! Abyss!
-------------------- - blue_scape / Nico -
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Oct 7 2005, 09:31 AM
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#7
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 Member Group: Members Posts: 255 Joined: 4-January 05 Member No.: 135 |
QUOTE (SigurRosFan @ Oct 7 2005, 07:02 AM) Abyss! Abyss!   We won't have to worry about power either... |
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Feb 7 2006, 07:03 PM
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#8
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 Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Astrophysics, abstract
astro-ph/0602129 From: Juan Manuel Borrero [view email] Date: Mon, 6 Feb 2006 17:20:10 GMT (28kb) The uncombed penumbra Authors: J.M. Borrero, M. Rempel, S.K. Solanki Comments: 6 pages, 2 figures. to appear in the proceedings of the Solar Polarization Workshop IV The uncombed penumbral model explains the structure of the sunspot penumbra in terms of thick magnetic fibrils embedded in a magnetic surrounding atmosphere. This model has been successfully applied to explain the polarization signals emerging from the sunspot penumbra. Thick penumbral fibrils face some physical problems, however. In this contribution we will offer possible solutions to these shortcomings. http://arxiv.org/abs/astro-ph/0602129 -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Feb 9 2006, 03:33 PM
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#9
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Astrophysics, abstract
astro-ph/0602176 From: Huw Morgan [view email] Date: Wed, 8 Feb 2006 01:26:00 GMT (54kb) The Impact of Sunspots on the Interpretation of Coronal Observations of the O VI Doublet Authors: H. Morgan, Shadia Rifai Habbal Comments: 4 pages, 3 figures Journal-ref: ApJ Letters, 630, 2005, L189 Due to their high intensity of emission in the O VI 1031.9 and 1037.6A lines, even small sunspots on the solar disk can strongly influence the intensity of the radiative scattering component of O VI lines in the corona. Observations of O VI disk spectra show a 1032/1038 line intensity ratio of >2.6 in a sunspot compared to quiet disk values of 2. The enhancement of the 1032 line in comparison to the 1038 is likely due to interaction between molecular hydrogen emission from the sunspot and the chromospheric O5+. Modeling shows that a contribution from sunspots increases the coronal O VI 1032/1038 intensity ratio to values considerably higher than those achieved with a quiet disk or coronal hole spectrum. Therefore a re-examination of flow velocities derived from UVCS/SOHO streamer observations must be made. This modeling demonstrates that the inclusion of sunspots, when present, may lead to non-zero outflow velocities at lower heights in streamer cores in contrast to some existing model results. http://arxiv.org/abs/astro-ph/0602176 -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Feb 10 2006, 01:24 AM
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#10
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 The Insider Group: Members Posts: 669 Joined: 3-May 04 Member No.: 73 |
QUOTE (SigurRosFan @ Oct 7 2005, 12:02 AM) Abyss! Abyss! Haaaha! We'll have to go there at night so we won't burn up... 
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Feb 14 2006, 06:10 PM
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#11
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Astrophysics, abstract
astro-ph/0602260 From: Alexander Kosovichev [view email] Date: Sat, 11 Feb 2006 23:54:21 GMT (512kb) Surface Magnetism Effects in Time-Distance Helioseismology Authors: Junwei Zhao, Alexander G. Kosovichev Comments: 19 pages, 8 figures, Astrophys.J., in press Recent observations of helioseismic holography revealed that magnetic fields inclined to the line-of-sight direction could cause systematic variations in measured acoustic phase shifts, and that the surface magnetic field may shift the phases and impair the coherence of acoustic waves (known as "showerglass effect"). We examine how these affect time-distance helioseismology measurements. It is confirmed that the inclined magnetic field could cause variations in acoustic travel times inside sunspot penumbra, however, inversions of the measured times show that this effect only slightly shifts the location of negative sound-speed variations near the solar surface, but does not change the inverted deeper interior structures. Regarding to the showerglass effect, we find that outgoing and incoming travel time perturbations through sunspots are significantly smaller than those reported from helioseismic holography. In addition, our second-skip cross-correlation experiments demonstrate that inside sunspots, the half of the double-skip travel times are very similar to the mean single-skip travel times. We conclude that these surface magnetism effects do not cause considerable systematic errors in time-distance helioseismology of active regions. http://arxiv.org/abs/astro-ph/0602260 -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Feb 14 2006, 10:46 PM
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#12
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 Senior Member Group: Members Posts: 1619 Joined: 12-February 06 From: Bergerac - FR Member No.: 678 |
And say that this sunspot is big as the Earth. It's very amazing! Woow!!
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Feb 15 2006, 08:26 PM
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#13
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
400-YEAR OLD SUNSPOTS: Today is the 442nd birthday of Galileo Galilei,
a figure of importance in the history of space weather. Contrary to popular belief, Galileo didn't discover sunspots, but he was one of the first to observe them using a telescope and he discovered many of their basic properties. Visit http://spaceweather.com to learn more about Galileo's pioneering work and to see actual drawings of sunspots he made more than four centuries ago. -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Jun 5 2006, 04:04 PM
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#14
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
-------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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