{"id":126404,"date":"2021-11-23T09:00:41","date_gmt":"2021-11-23T09:00:41","guid":{"rendered":"https:\/\/www.edristi.in\/?p=126404"},"modified":"2021-11-23T09:00:44","modified_gmt":"2021-11-23T09:00:44","slug":"astronomers-discovered-main-sequence-radio-pulse-emitters-or-mrps","status":"publish","type":"post","link":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/astronomers-discovered-main-sequence-radio-pulse-emitters-or-mrps\/","title":{"rendered":"Astronomers discovered Main-sequence Radio Pulse\u2019 emitters or MRPs"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Question: Astronomers from which of the following country recently discovered the Main-sequence Radio Pulse\u2019 emitters or MRPs?<br><\/strong>a) India<br>b) USA<br>c) Japan<br>d) China<br><strong>Answer: (a)<br>Related Facts:-<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Astronomers from India\u2019s NCRA have discovered Main-sequence Radio Pulse\u2019 emitters or MRPs.<\/li><li>It is the team of astronomers from the Pune-based National Centre for Radio Astrophysics (NCRA-TIFR).<\/li><li>Scientists are of the view that it is a vital discovery which will aid in the understanding of exotic radio stars and stellar magnetospheres.<\/li><li>(NCRA-TIFR) astronomers have used the upgraded Giant Metrewave Radio Telescope (uGMRT) to discover eight stars belonging to this kind rare category.<\/li><li>Of the total 15 MRPs known so far, 11 have been discovered by the NCRA-TIFR team alone.<\/li><li>Wide bandwidth and high sensitivity of the upgraded GMRT played a pivotal role in this kind of discovery.<\/li><li>GMRT is a radio telescope located at Khodad in Pune district and which is not operated by the National Radio Astronomy Observatory in the U.S.<\/li><li>The Main-sequence Radio Pulse\u2019 emitters (MRPs) are stars hotter than Sun with unusually strong magnetic fields.<\/li><li>MRPs eject gases much stronger than stellar wind (a continuous flow of gas from a star\u2019s upper atmosphere).<\/li><li>Due to this activity they emit bright radio pulses like a lighthouse.<\/li><li>The success of the GMRT programme has revolutionised our notion about this class of stars.<\/li><li>Though the first MRP was discovered in 2000, it was only due to the high sensitivity of the uGMRT that the discovery of more such stars as possible.<\/li><li>The success of the survey with the uGMRT suggests that the current notion of MRPs as rare objects may not be correct.<\/li><li>Barnali Das a PhD student at the NCRA-TIFR, who has been actively studying this phenomenon, says that MRPs are probably more common but are difficult to detect.<\/li><li>In fact, it was Ms. Das and her supervisor, Prof. Poonam Chandra of the NCRA who first introduced the appellation \u2018MRP\u2019 in 2020 in an effort to understand the properties of these stars.<\/li><li>The duo has performed the most extensive study of MRPs over an ultra-wide frequency range.<\/li><li>The used for this purpose two of the world\u2019s leading radio telescopes: the uGMRT and the U.S. based Karl G. Jansky Very Large Array (VLA).<\/li><li>The high sensitivity of the uGMRT and its ability to make high resolution images have been instrumental in enabling the recovery of the pulsed signal from the space.<\/li><li>This, combined with a strategic observation campaign allowed the astronomers to overcome difficulties, and reveal the true nature of these objects.<\/li><li>Ms. Das expressed that magnetic field and the temperature is two quantities that appear to play the major role in deciding how intense the radio pulse.<\/li><li>She said that these findings will prove crucial in understanding what switches off the production of radio pulses in a hot magnetic star.<\/li><li>A research paper describing these new discoveries has been recently accepted for publication in the prestigious Astrophysical Journal (ApJ).<\/li><li>The work done by Ms. Das, Prof. Chandra and other members of the NCRA team has shown for the first time that the radio pulses emitted by MRPs contain a vast amount of information regarding the stellar magnetosphere.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Links:-<\/strong><br><a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/ncra-astronomers-discover-rare-radio-stars\/article37586840.ece\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.thehindu.com\/sci-tech\/science\/ncra-astronomers-discover-rare-radio-stars\/article37586840.ece<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Question: Astronomers from which of the following country recently discovered the Main-sequence Radio Pulse\u2019 emitters or MRPs?a) Indiab) USAc) Japand) ChinaAnswer: (a)Related Facts:- Astronomers from India\u2019s NCRA have discovered Main-sequence Radio Pulse\u2019 emitters or MRPs. It is the team of astronomers from the Pune-based National Centre for Radio Astrophysics (NCRA-TIFR). Scientists are of the view [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":126405,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1123],"tags":[3067],"class_list":["post-126404","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-snes","tag-scientific"],"_links":{"self":[{"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/posts\/126404","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/comments?post=126404"}],"version-history":[{"count":1,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/posts\/126404\/revisions"}],"predecessor-version":[{"id":126406,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/posts\/126404\/revisions\/126406"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/media\/126405"}],"wp:attachment":[{"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/media?parent=126404"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/categories?post=126404"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/tags?post=126404"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}