first_imgThe public reaction from the resignation of Donegal manager Jim McGuinness has been huge.DonegalTV caught up with fans, pundits and reporters to get their reaction from the resignation. Simply click to play.DDTV: DONEGAL GIVES ITS REACTION TO JIM McGUINNESS RESIGNATION was last modified: October 6th, 2014 by StephenShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window) Tags:donegalDonegalTVGAAJim McGuinnesslast_img read more

More Stellar Nursery Eggs Discovered in Carina Nebula

first_imgAddThis ShareCONTACT:Lia Unrau, News Office (713) 831-4793 MORE STELLAR NURSERY “EGGS” DISCOVERED IN CARINA NEBULANew evidence of cosmic EGGs-small cocoons of gas and dust surrounding newly forming stars, and known more formally as evaporating gaseous globules-has been discovered in the Great Carina Nebula, a Rice University astronomer announcedtoday. Analysis of photos taken by the Hubble Space Telescope with the Wide-Field & Planetary Camera-2 (WFPC2) reveal the third and oldest, largest and most distant grouping of EGGs known, Reginald Dufour, Professor of Space Physics and Astronomy at Rice University, reported today at the American Astronomical Society meeting in SanAntonio, Texas. The unexpected finding indicates that star formation is taking place in a star cluster region older than other areas where astronomers have found EGGs. The discovery promises to shed new light on the evolution of star-forming clusters and how long theseclusters remain active birthing sites. Dufour’s team retrieved the new images with the Hubble Space Telescope (HST) while observing a larger field in the Great Carina Nebula as a secondary effort to its study of the spectrum of the famous eruptive star, Eta Carinae. The “surprise” resultdemonstrates the power of HST to make new discoveries by taking”snapshots” while performing other scientific studies, Dufour said. Other team members include Douglas J. Van Orsow of the Space Telescope Science Institute in Baltimore, Md.; J. Jeff Hester of Arizona State University in Tempe, Ariz.; Douglas G. Currie of the University of Maryland in College Park, Md.; and Donald K.Walter of South Carolina State University in Orangeburg, S.C. Cosmic EGGs are believed to be small, dark globules of gas and dust enshrouding newly forming stars in starbirthing regions in the Milky Way and almost certainly other galaxies. Hester (Ph.D. ’85, Rice) and Paul Scowen (Ph.D. ’92, Rice) also of Arizona State University, coined the term EGGs in a November 1995 study of HSTimages of the H II region the Eagle Nebula (M16). An H II region is an area where luminous volumes of gaseous plasma surrounds very hot stars. Hester, C. Robert O’Dell of Rice University and their collaborators previously discovered similar dark protostellar objects in the Orion Nebula (M42), the nearestknown H II region to Earth.“Our chance discovery indicates that some of these globules hang around for a long time in the outer parts of a star-forming region, several tens of millions of years at least, and this makes for a spread in what can be called the ‘age’ of a star cluster,” Dufour said. He suggested that ultimately, the cocoon of gas and dust around these young stars will evaporate and they will emerge as what astronomers call “T-Tauri Stars” and “Herbig-Haro” objects,which are seen in many H II regions. The Great Carina Nebula is among the largest H II regions known in our galaxy, and only visible to observers in the Southern Hemisphere, where it appears as a prominent blur in the constellation Carina. It is a giant (some 500 light years in diameter) complex of young stars and hot excited gas, located about 8,000 light years away from the Earth. Included in this star-forming region are several of the hottest and most massive stars known in the Galaxy. Dark lanes of dusty cool gas protrude into the regions of the hot emitting gas excited by several young clusters of hotstars, giving another name for the nebula as the “Keyhole Nebula.” Just north of the Keyhole lies the region observed by HST, near the center of the relatively inconspicuous star cluster called Collinder 232 (Cr 232), some 8 arc minutes north of Eta Carinae itself. Compared to several of the other star clusters in the Carina Nebula, relatively little is known about Cr 232 because it appears only as a loose aggregation of stars. This fact attracted Dufour and his colleagues to take advantage of this ppportunity to image thecluster and surrounding gas with HST while studying Eta Carinae.“Originally, our aim was to measure the properties of faint stars in Cr 232 because it was relatively little studied and we hoped to be able to last_img read more