Press Releases: NOAO

30 Abril 2013: Astronomers at the Southern Astrophysical Research (SOAR) Telescope and the Cerro Tololo Inter-American Observatory (CTIO) have demonstrated the significant difference that sharp stellar images can make in our understanding of the properties of stars. They have observed the globular cluster NGC 6496 using a new instrument dubbed SAM, for SOAR Adaptive Module, which creates an artificial laser guide star. SAM, built by CTIO/NOAO-S, is mounted on the SOAR 4.1 meter telescope.

1 Abril 2013: Watching starbirth isn’t easy: tens of millions of years are needed to form a star like our Sun. Much like archeologists who reconstruct ancient cities from shards of debris strewn over time, astronomers must reconstruct the birth process of stars indirectly, by observing stars in different stages of the process and inferring the changes that take place. Studies show that half of the common stars, including our Sun, formed in massive clusters, rich with young stars, from which they eventually escape. As part of his PhD thesis work, Thomas Allen, University of Toledo, has been observing such a region where stars are forming.

18 Febrero 2013: On February 15, asteroid 2012 DA14 passed extraordinarily close to the earth. Unlike the unexpected asteroid collision over Russia that day, this encounter never presented any danger but astronomers were eager to observe the event. An international team led by Nicholas Moskovitz (MIT) observed the asteroid with a number of telescopes, including the 2.1m telescope at Kitt Peak National Observatory: the accompanying video shows the asteroid as it was leaving the vicinity of the earth. As Dr. Moskovitz said, “Flybys like this, particularly for objects smaller than 2012 DA14, are not uncommon. This one was special because we knew about it well in advance so that observations could be planned to look at how asteroids are effected by the Earth’s gravity when they come so close.” In this movie, the asteroid is seen moving across a field about one third the size of the full moon in about 45 minutes. The field is located in the constellation of the Little Dipper: north is to the left and east is down.

12 Febrero 2013: This image of a planetary nebula, which may suggest a rose to some, was obtained with the wide-field view of the National Optical Astronomy Observatory (NOAO) Mosaic 1 camera on the Mayall 4-meter telescope at Kitt Peak National Observatory.

18 Diciembre 2012: As an end of the year finale, the National Optical Astronomy Observatory (NOAO) and WIYN partners offer this new wide-field image of the Cygnus loop. Three degrees on a side, this image covers an area of the sky about 45 times that of the full moon. But it does so without sacrificing high resolution. The image is over 600 million pixels in size, making it one of the largest astronomical images ever made.

4 Diciembre 2012: Just in time for the holidays, a spectacular image of the Bubble Nebula (NGC 7635) demonstrates the potential of the new camera known as the One Degree Imager, or ODI, that is being commissioned at the WIYN 3.5-meter telescope on Kitt Peak. The Bubble Nebula is a shell of gas and dust carved out by the stellar wind of the massive central star (BD+60 2522), and ionized by the same star’s high-energy light. Located in the constellation Cassiopeia, this nebula is about 10 light-years across.

19 Noviembre 2012: One of the major puzzles in astronomy today is the nature of the mysterious force that astronomers have dubbed Dark Energy. And one tool in understanding this force is encoded in the distribution of clusters of galaxies in the Universe. Thus, new work by a team of astronomers that has yielded exquisitely precise distances of a large sample of clusters may lead to breakthroughs in understanding the expansion history of our Universe.

1 Noviembre 2012: On November 9, 2012, ceremonies on the summit of Cerro Tololo, Chile will mark the dedication of the Dark Energy Camera and the beginning of the 50th anniversary celebration of Cerro Tololo Inter-American Observatory (CTIO). Speakers will include Drs. David Silva (NOAO Director), R. Christopher Smith (Director of AURA Observatories in Chile), Nicole van der Bliek (CTIO Director), Joshua Frieman (Director of the Dark Energy Survey), Timothy Abbott and Alistair Walker (CTIO), and Brenna Flaugher (Fermilab).

17 Septiembre 2012: Eight billion years ago, rays of light from distant galaxies began their long journey to Earth. That ancient starlight has now found its way to a mountaintop in Chile, where the newly constructed Dark Energy Camera, the most powerful sky-mapping machine ever created, has captured and recorded it for the first time.

10 Septiembre 2012: The days when professional astronomers peered through telescopes are long gone. Today, the camera or other instrument that is attached to the telescope is as important as the telescope itself. Over the life of a telescope, new instruments are added that greatly enhance its capabilities. So the new camera known as the One Degree Imager, or ODI, that is being commissioned at the WIYN 3.5-meter telescope on Kitt Peak is of great excitement to astronomers. When fully operational, the ODI camera will be able to image an area of the sky five times that of the full moon – far larger than any previous camera at the WIYN telescope. Sensitive to visible light, the camera will be able to resolve objects as small as 0.3 arc seconds – about the equivalent of seeing a baseball at a distance of 30 miles away.

3 Septiembre 2012: On August 29th, the lights went off and the stars turned on during a special event at Beijing Planetarium. As part of the meeting of the International Astronomical Union (IAU), Dr. Malcolm Smith, National Optical Astronomy Observatory (NOAO) was honored for his long and substantial contributions to light pollution abatement on behalf of astronomical observatories and the community at large. Dr. David Silva (NOAO Director) and Bob Parks (International Dark-Sky Association Executive Director) presented Dr. Smith with the IDA David Crawford Lifetime Achievement Award. This award, in honor of the International Dark-Sky Association’s (IDA) co-founder and first executive director, recognizes those who have made substantial effort and change in light pollution abatement education.

16 Abril 2012: Stars live for a long time, with even the most massive stars having lifetimes measured in millions of years. But, for a mere few thousand years towards the end of their lives, some massive stars go through what astronomers call the yellow supergiant phase. This is remarkably short in astronomical terms, and, as a result, stars in this phase are incredibly rare. In a recent study, astronomers from Lowell Observatory have acted as “stellar paparazzi”, managing to identify hundreds of these rare yellow supergiants, and their more long-lived descendants, the red supergiants in two neighboring galaxies. The Lowell astronomers use these newly identified populations to provide a stringent observational test for the theoretical models which describe how these stars change from blue, to yellow and then to red. These constraints are vital because the behavior of the models in this phase can influence many theoretical predictions, including something as “basic” as what types of stars explode as supernova.

19 Diciembre 2011: It sounds like the start of a bad joke: do you know about the bar in the center of the Milky Way Galaxy? Astronomers first recognized almost 80 years ago that the Milky Way Galaxy, around which the sun and its planets orbit, is a huge spiral galaxy. This isn’t obvious when you look at the band of starlight across the sky, because we are inside the galaxy: it’s as if the sun and solar system is a bug on the spoke of a bicycle wheel. But in recent decades astronomers have suspected that the center of our galaxy has an elongated stellar structure, or bar, that is hidden by dust and gas from easy view. Many spiral galaxies in the universe are known to exhibit such a bar through the center bulge, while other spiral galaxies are simple spirals. And astronomers ask, why? In a recent paper Dr. Andrea Kunder, of Cerro Tololo Inter-American Observatory (CTIO) in northern Chile, and a team of colleagues have presented data that demonstrates how this bar is rotating.

30 Noviembre 2011: The NASA Kepler Mission is designed to survey a portion of our region of the Milky Way Galaxy to discover Earth-size planets in or near the “habitable zone,” the region in a planetary system where liquid water can exist, and determine how many of the billions of stars in our galaxy have such planets. It now has another planet to add to its growing list. A research team led by Steve Howell, NASA Ames Research Center, has shown that one of the brightest stars in the Kepler star field has a planet with a radius only 1.6 that of the earth’s radius and a mass no greater that 10 earth masses, circling its parent star with a 2.8 day period. With such a short period, and such a bright star, the team of over 65 astronomers (that included David Silva, Ken Mighell and Mark Everett of NOAO) needed multiple telescopes on the ground to support and confirm their Kepler observations. These included the 4 meter Mayall telescope and the WIYN telescope at Kitt Peak National Observatory. The accompanying figure shows the size of the Kepler field, seen over Kitt Peak.

20 Noviembre 2011: An asteroid impact with the earth can really ruin your day: just consider the dinosaurs. Most asteroids, also known as minor planets, orbit the sun beyond the planet Mars and present no danger, but there is a class of asteroids whose orbits cross the orbit of the earth. If one of these asteroids and the earth are at the same point in their orbits at the same time, a collision could occur. Called Near Earth Objects (NEOs), astronomers are interested in discovering as many of these as possible, and then tracking them in order to compute more accurate orbits. In this way, if a potential future collision were to be identified many years in advance, space probes could carry out steps to tweak the path of the NEO and deflect the collision. A program to track NEOs is being carried out at NOAO by Mark Trueblood with Robert Crawford (Rincon Ranch Observatory) and Larry Lebofsky (Planetary Science Institute). And last summer, a Beloit College student, Morgan Rehnberg, has developed a computer program (PhAst), available via the web, to help with this effort.

19 Octubre 2011: In a paper just published in Nature, Aaron Geller (Northwestern U) and Robert Mathieu (U of Wisconsin) have shown that blue stragglers are most probably formed from mass transfer or mergers in binary systems, rather than originating from stellar collisions as has also been proposed. Observations made at the WIYN 3.5m of the old open cluster NGC 188 show that blue stragglers in long period binaries have companions with masses ~ 0.5 solar mass, with very little scatter.

5 Octubre 2011: Astronomy and optical science lost a great pioneer and innovator when Dr. Aden Meinel passed away on 2 October 2011. Meinel led the development, and became the first Director, of the Kitt Peak National Observatory, located near Tucson, AZ. He then went on to become Director of the Steward Observatory at the University of Arizona, where he also founded the Optical Sciences program.

5 Octubre 2011: The 2011 Nobel Prize in Physics was awarded to Saul Perlmutter, Brian Schmidt, and Adam Riess for their discovery of the acceleration of the Universe, one of the more surprising cosmological results in modern astronomy. The discovery was enabled in large part through use of National Science Foundation (NSF) facilities operated by the National Optical Astronomy Observatory (NOAO) with headquarters in Tucson, Arizona and telescopes in Arizona and Chile.

31 Agosto 2011: This wide-field panorama of star formation was captured with the National Science Foundation’s Mayall 4-meter telescope on Kitt Peak. Located in the constellation of Orion (the Hunter), the image show a portion of one of Orion’s giant molecular clouds (known as “Orion A”) where new stars are forming.

10 Agosto 2011: A team of astronomers, using the Spitzer Space Telescope, have reported the first extragalactic detection of the C70 fullerene molecule, and the possible detection of planar C24 (“a piece of graphene”) in space. Letizia Stanghellini and Richard Shaw, members of the team at the National Optical Astronomy Observatory in Tucson, Arizona describe how collisional shocks powered by the winds from old stars in planetary nebulae could be responsible for the formation of fullerenes (C60 and C70) and graphene (planar C24). The team is led by Domingo Aníbal García-Hernández of the Instituto de Astrofísica de Canarias in Spain and includes international astronomers and biochemists.