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+--- Thread: Discoveries using the telescopes on Mauna Kea (/showthread.php?tid=17412)
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RE: Discoveries by the telescopes on Mauna Kea - TomK - 09-08-2016
Astronomical "fossils".
Most globular clusters are ancient and contain stars that are extremely old, but this one is a bit odd and has both very old and quite a bit younger. The Keck Observatory on Mauna Kea helped take observations that might help solve the mystery and explain more about our own Galaxy's history.
http://www.keckobservatory.org/recent/entry/rare_fossil_relic_of_early_milky_way_discovered
http://www.sci-news.com/astronomy/cluster-terzan-5-living-fossil-04170.html
RE: Discoveries by the telescopes on Mauna Kea - Guest - 09-08-2016
Those are some interesting links, thank you for sharing TomK. Allow me to pass on another good reading article this evening.
http://www.bbc.com/earth/story/20150715-why-save-an-endangered-species
Mauna Kea's summit was discovered to be a very unique and fragile natural environment as well. This environment and the endangered species that live in it are both rare and worth saving for our next generations. jmo
RE: Discoveries by the telescopes on Mauna Kea - TomK - 09-08-2016
This isn't a discovery, but a few months ago we got a request from the BBC who were doing a live science broadcast in the UK. UKIRT staff were asked if we could provide an image that night, and despite poor weather and a very late request, we managed to get this for them. It's only a few seconds of exposure time in the infrared.
Whirlpool Galaxy (M51) and its companion galaxy, NGC 5195:
http://www.ukidss.org/images/ukidss-m51-large.jpg
RE: Discoveries by the telescopes on Mauna Kea - PaulW - 09-08-2016
Tom - that is an incredible picture!
Gypsy - your proposed ski resort on Mauna Kea would've done more harm to any native species, jmo
Spamtroll - I predict you'll make some inane comment
RE: Discoveries by the telescopes on Mauna Kea - geochem - 09-09-2016
Tom,
beautiful photo - and stimulates a number of thoughts - not the least of which is whether any of those planetary systems produced life forms more intelligent than those in our "immediate neighborhood". Which brings me to:
quote:
Originally posted by gypsy69
http://www.bbc.com/earth/story/20150715-why-save-an-endangered-species
Mauna Kea's summit was discovered to be a very unique and fragile natural environment as well. This environment and the endangered species that live in it are both rare and worth saving for our next generations. jmo
that article is a complete load of drivel. There really is only one environmental/extinction problem: too many humans trying to survive on a limited patch of real estate and crowding out, and destroying habitat, of too many of our companion species. And being lectured at about the importance of preserving endangered species for future generations by someone who has produced offspring at twice the sustainable rate is rich indeed.
I look forward to the day that we can discover and communicate with some other more intelligent interstellar species to find out how they managed to avoid the fate we seem to be headed for - although can't imagine why they would want to communicate with us...
RE: Discoveries by the telescopes on Mauna Kea - HereOnThePrimalEdge - 09-09-2016
gypsy posted a link on another thread, which if read to the end of the article suggests the protectors may be the greatest threat to the wekiu bugs and other insects on Mauna Kea:
Ants have become the biggest threat... because they’ve already been spotted just down-slope at Mauna Kea County Park and Puuhuluhulu. Argentine ants have already reduced silverswords on Maui’s Haleakala, and environmental managers fear the same thing could happen to Mauna Kea’s endangered silverswords.
Ants caused a brief scare early last year when some black house ants were discovered on palm fronds brought up to thatch a hale put up by TMT protesters across from the visitor center at 9,400 feet.
He notes that it is indeed a cultural practice of Hawaiians to place plants and other offerings on ahu, or rocks stacked as an altar. The material, however, is generally taken away after it is “consumed” by the deity, within 10 days, he said.
Stopping Thursday at an ahu blocking the access road to the proposed TMT site, Ishibashi checks out the dried plant materials on top.
Some pieces have blown off onto the surrounding lava field.
Ishibashi shakes his head and walks away.
“We just let it go; let the courts decide,” Ishibashi says. “No sense making trouble.”
http://hawaiitribune-herald.com/news/local-news/mountain-stands-tall-battle-over-telescope-wages-below
“We’ve got to be as clear-headed about human beings as possible, because we are still each other’s only hope,” James Baldwin to Margaret Mead in the book A Rap On Race
RE: Discoveries by the telescopes on Mauna Kea - TomK - 09-12-2016
"Explaining why the universe can be transparent"
When the universe was very young, it was completely opaque (the cosmic dark ages). As the universe expanded, things cooled down and light was finally able to escape and ionize hydrogen. That made the universe even more visible and things started to happen, including galaxies and stars starting to form.
http://phys.org/news/2016-09-universe-transparent.html
The two science papers just published are based on data taken at the Keck observatory on Mauna Kea.
RE: Discoveries by the telescopes on Mauna Kea - Guest - 09-12-2016
LOL,
Working hard on NEW findings tonight r ye' TomK ?
Yawnfest and HOW EXACTLY is this PUNA related ?
Waiting for PaulK to chime in next.
RE: Discoveries by the telescopes on Mauna Kea - TomK - 09-12-2016
AP whined:
"Yawnfest and HOW EXACTLY is this PUNA related ?"
http://www.punaweb.org/Forum/register.asp
"Punaweb's forums are provided as a community service and all topics and posts are required to be about or concerned with life in Hawaii and Puna."
What was it you were saying about being clueless?
If you're not interested in the astrophysics research being carried out on the island, you don't need to read or contribute to this thread. However, since you're reading it and feel compelled to respond, why not explain your interest here?
RE: Discoveries by the telescopes on Mauna Kea - Guest - 09-12-2016
LOL, I was wondering how and when 'till you would blog / bump your post back up.
I'm interested in things that most of us are as they relate to our very lives. "Astrophysics research" is not the title of the thread TomK. Even as you spackle in the required key words. It does not mean it's Puna related, nor do you have permission to determine if I read and or comment on it.
That said, and since you asked, I don't think http://phys.org/news/2016-09-universe-transparent.html is "concerning" with life in Hawaii and Puna.
The hungry boys and girls thread is much more apropos. JMO.
I click on it like everyone else to see some new " discovery " as per the title, only to be let down with another tenuously linked blog that does note even mention Hawaii , let alone MK.
Below is the write up ...
Two papers published by an assistant professor at the University of California, Riverside and several collaborators explain why the universe has enough energy to become transparent.
The study led by Naveen Reddy, an assistant professor in the Department of Physics and Astronomy at UC Riverside, marks the first quantitative study of how the gas content within galaxies scales with the amount of interstellar dust.
This analysis shows that the gas in galaxies is like a "picket fence," where some parts of the galaxy have little gas and are directly visible, whereas other parts have lots of gas and are effectively opaque to ionizing radiation. The findings were just published in The Astrophysical Journal.
The ionization of hydrogen is important because of its effects on how galaxies grow and evolve. A particular area of interest is assessing the contribution of different astrophysical sources, such as stars or black holes, to the budget of ionizing radiation.
Most studies suggest that faint galaxies are responsible for providing enough radiation to ionize the gas in the early history of the universe. Moreover, there is anecdotal evidence that the amount of ionizing radiation that is able to escape from galaxies depends on the amount of hydrogen within the galaxies themselves.
The research team led by Reddy developed a model that can be used to predict the amount of escaping ionizing radiation from galaxies based on straightforward measurements on how "red," or dusty, their spectra appear to be.
Alternatively, with direct measurements of the ionizing escape fraction, their model may be used to constrain the intrinsic production rate of ionizing photons at around two billion years after the Big Bang.
These practical applications of the model will be central to the interpretation of escaping radiation during the cosmic "dark ages," a topic that is bound to flourish with the coming of 30-meter telescopes, which will allow for research unfeasible today, and the James Webb Space Telescope, NASA's next orbiting observatory and the successor to the Hubble Space Telescope.
The research ties back to some 400,000 years after the Big Bang, when the universe entered the cosmic "dark ages," where galaxies and stars had yet to form amongst the dark matter, hydrogen and helium.
A few hundred million years later, the universe entered the "Epoch of Reionization," where the gravitational effects of dark matter helped hydrogen and helium coalesce into stars and galaxies. A great amount of ultraviolet radiation (photons) was released, stripping electrons from surrounding neutral environments, a process known as "cosmic reionization."
Reionization, which marks the point at which the hydrogen in the Universe became ionized, has become a major area of current research in astrophysics. Ionization made the Universe transparent to these photons, allowing the release of light from sources to travel mostly freely through the cosmos.
The data for this research was acquired through the low resolution imaging spectrograph on the W.M. Keck Observatory.
The collaborators of this research are Charles Steidel (Caltech), Max Pettini (University of Cambridge), Milan Bogosavljevic (Astronomical Observatory, Belgrade) and Alice Shapley (UCLA).
The papers are "Spectroscopic Measurements of the Far-Ultraviolet Dust Attenuation Curve at z~3" and "The Connection Between Reddening, Gas Covering Fraction, and the Escape of Ionizing Radiation at High Redshift."
Explore further: Black holes from the dawn of the universe
More information: Naveen A. Reddy et al. SPECTROSCOPIC MEASUREMENTS OF THE FAR-ULTRAVIOLET DUST ATTENUATION CURVE AT¡ 3, The Astrophysical Journal (2016). DOI: 10.3847/0004-637X/828/2/107
Naveen A. Reddy et al. THE CONNECTION BETWEEN REDDENING, GAS COVERING FRACTION, AND THE ESCAPE OF IONIZING RADIATION AT HIGH REDSHIFT, The Astrophysical Journal (2016). DOI: 10.3847/0004-637X/828/2/108
Journal reference: Astrophysical Journal search and more info website
Provided by: University of California - Riverside search and more info website
Read more at: http://phys.org/news/2016-09-universe-transparent.html#jCp
Two papers published by an assistant professor at the University of California, Riverside and several collaborators explain why the universe has enough energy to become transparent.
The study led by Naveen Reddy, an assistant professor in the Department of Physics and Astronomy at UC Riverside, marks the first quantitative study of how the gas content within galaxies scales with the amount of interstellar dust.
Read more at: http://phys.org/news/2016-09-universe-transparent.html#jCp
ETA, yep puna related