{"id":1667332,"date":"2018-01-30T19:22:23","date_gmt":"2018-01-31T00:22:23","guid":{"rendered":"http:\/\/www.futurity.org\/?p=1667332"},"modified":"2018-01-31T10:23:11","modified_gmt":"2018-01-31T15:23:11","slug":"black-hole-wind-molecules-1667332","status":"publish","type":"post","link":"https:\/\/www.futurity.org\/black-hole-wind-molecules-1667332\/","title":{"rendered":"Theory: Mystery molecules in black hole winds were born there"},"content":{"rendered":"

Molecules found in winds powered by supermassive black holes at the centers of galaxies may be brand new, rather than older molecules somehow adapting to survive the inhospitable area, according to a new theory.<\/p>\n

The existence of large numbers of the molecules in black hole winds has puzzled astronomers since their discovery more than a decade ago. Molecules trace the coldest parts of space, and black holes are the most energetic phenomena in the universe, so finding molecules in black hole winds was like discovering ice in a furnace.<\/p>\n

Astronomers questioned how anything could survive the heat of the energetic outflows, but the new theory predicts that these molecules are born in the winds with unique properties that enable them to adapt to and thrive in the hostile environment.<\/p>\n

\"Black
Galaxy-scale outflow driven by the central black hole. (Credit: ESA)<\/figcaption><\/figure>\n

The theory is the work of Alexander Richings, a postdoctoral fellow at Northwestern University who developed the computer code that, for the first time, modeled the detailed chemical processes that occur in interstellar gas accelerated by radiation emitted during the growth of supermassive black holes.<\/p>\n

“When a black hole wind sweeps up gas from its host galaxy, the gas is heated to high temperatures, which destroy any existing molecules,” Richings says. “By modeling the molecular chemistry in computer simulations of black hole winds, we found that this swept-up gas can subsequently cool and form new molecules.<\/p>\n

This theory answers questions raised by previous observations made with several cutting-edge astronomical observatories including the Herschel Space Observatory and the Atacama Large Millimeter Array, a powerful radio telescope located in Chile.<\/p>\n

In 2015, astronomers confirmed the existence of energetic outflows from supermassive black holes found at the center of most galaxies. These outflows kill everything in their path, expelling the food\u2014or molecules\u2014that fuel star formation. These winds are also presumed to be responsible for the existence of “red and dead” elliptical galaxies, in which no new stars can form.<\/p>\n

Black holes aren’t as strong as we thought<\/a><\/h5>\n

Then, in 2017, astronomers observed rapidly moving new stars forming in the winds\u2014a phenomenon they thought would be impossible given the extreme conditions in black hole-powered outflows.<\/p>\n

New stars form from molecular gas, so the researchers’ new theory of molecule formation helps explain the formation of new stars in winds. It upholds previous predictions that black hole winds destroy molecules upon first collision but also predicts that new molecules\u2014including hydrogen, carbon monoxide, and water\u2014can form in the winds themselves.<\/p>\n

“This is the first time that the molecule formation process has been simulated in full detail, and in our view, it is a very compelling explanation for the observation that molecules are ubiquitous in supermassive black hole winds, which has been one of the major outstanding problems in the field,” says coauthor Claude-Andr\u00e9 Faucher-Gigu\u00e8re, who studies galaxy formation and evolution as an assistant professor in Northwestern’s Weinberg College of Arts and 糖心视频s.<\/p>\n

Richings and Faucher-Gigu\u00e8re predict that the new molecules formed in the winds are warmer and brighter in infrared radiation compared to pre-existing molecules. That theory will be put to the test when NASA launches the James Webb Space Telescope in spring 2019. If the theory is correct, the telescope will be able to map black hole outflows in detail using infrared radiation.<\/p>\n

Supercomputer sheds light on ‘jets’ shooting from black holes<\/a><\/h5>\n

The researchers report their findings in the Monthly Notices of the Royal Astronomical Society<\/em><\/a>.<\/p>\n

Source: <\/em>Northwestern University<\/em><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Molecules found in winds powered by supermassive black holes at the centers of galaxies may […]<\/p>\n","protected":false},"author":9052,"featured_media":1667382,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[13,3],"tags":[2458,18],"class_list":["post-1667332","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-featured","category-science-technology","tag-black-holes","tag-space","university-northwestern-university"],"acf":[],"yoast_head":"\nTheory: Mystery molecules in black hole winds were born there - 糖心视频<\/title>\n<meta name=\"description\" content=\"Finding molecules in winds coming from black holes at the center of galaxies is like discovering ice in a furnace. 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