Lee este anuncio de prensa en español aquí.Īs the Event Horizon Telescope collected data for its remarkable new image of the Milky Way’s supermassive black hole, a legion of other telescopes including three NASA X-ray observatories in space was also watching.Īstronomers are using these observations to learn more about how the black hole in the center of the Milky Way galaxy - known as Sagittarius A * (Sgr A* for short) - interacts with, and feeds off, its environment some 27,000 light years from Earth. (Credit: X-ray: NASA/CXC/SAO IR: NASA/HST/STScI. A pull-out shows the new EHT image, which is only about 1.8 x 10-5 light years across (0.000018 light years, or about 10 light minutes). These images are seven light years across at the distance of Sgr A*. Two images of infrared light at different wavelengths from NASA’s Hubble Space Telescope show stars (orange) and cool gas (purple). The main panel of this graphic contains X-ray data from Chandra (blue) depicting hot gas that was blown away from massive stars near the black hole. This combined effort gave insight into what is happening farther out than the field-of-view of the EHT. Observatory staff include Patrick Fimbres, Thomas Folkers, David Forbes, Robert Freund, Christopher Greer, Christian Holmstedt, Gene Lauria, Martin McColl, Robert Moulton, and George Reiland.Multiple telescopes, including Chandra, observed the Milky Way's giant black hole simultaneously with the Event Horizon Telescope (EHT). Current and former undergraduates include Joseph Allen, Devin Cameron, Elizabeth Champagne, Landen Conway, Ryan Gatski, Dalton Glove, Yuan Jea Hew, Kyle Massingill, Kaylah McGowan, Chi-Hanh Nguyen, Jose Perez, Will Price, Gustavo Rodriguez, Anthony Schlecht, and Alexis Tinoco. Graduate students working on the project include David Ball, Junhan Kim, Lia Medeiros (PhD April 2019), Carolyn Raithel, Mel Rose, Arash Roshanineshat, Kaushik Satapathy, and Tyler Trent. The Tucson science team consists of Assistant Astronomer Chi-Kwan Chan, SO Prize Fellow Pierre Christian, NOAO Astronomer Tod Lauer, Associate Professor Dan Marrone, Professor Feryal Ozel, Professor Dimitrios Psaltis, and Astronomy/Steward Head/Director Buell Jannuzi and Professor Lucy Ziurys. The South Pole Telescope and the Sub Millimeter Telescope on Mt Graham were essential parts of the radio interferometer observations discussed here and were managed by Dan Marrone and his team. Some alternatives to black hole physics and General Relativity have already been ruled out. In addition, given the distance to M87, a mass of 6.5 billion (plus or minus 10%) solar masses is derived, consistent with the mass based on kinematics of stars and globular clusters from HST observations from the Nuker team and from ground-based observations. The bottom line shows those simulations processed as if they were EHT observations.). Numerical modeling of Kerr black holes produces model imaging consistent with the observed data, including this central "shadow" (The figure shows three different numerical models on the top line. The main result is that the 1.3mm wavelength images (from "Paper 1") of M87 show an asymmetric ring and a central region that is fainter than the ring by a factor of about 10. The released data and papers were of the massive black hole in the relatively nearby galaxy M87. Cordova, EHT Director Sheperd Doeleman (Center for Astrophyiscs | Harvard & Smithsonian), Associate Professor Dan Marrone (The University of Arizona), Associate Professor Avery Broderick (University of Waterloo), and Professor Sera Markoff (University of Amsterdam). Speakers at the press conference were NSF Director France A. They announced the first results of the supermassive black hole imaging done by using radio telescopes joined as an almost-Earth-sized telescope. At 9am EDT on April 10, 2019, the Event Horizon Telescope (EHT) team and the National Science Foundation held a press conference.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |