{"id":27800,"date":"2021-05-19T22:12:42","date_gmt":"2021-05-19T20:12:42","guid":{"rendered":"https:\/\/karmaka.de\/?p=27800"},"modified":"2021-05-20T15:18:49","modified_gmt":"2021-05-20T13:18:49","slug":"gaseous-atomic-nickel-in-the-coma-of-interstellar-comet-2i-borisov","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=27800","title":{"rendered":"Gaseous atomic nickel in the coma of interstellar comet 2I\/Borisov<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Piotr Guzik &amp; Micha\u0142 Drahus<\/p>\n\n\n\n<p>Nature volume 593, pages 375\u2013378 (2021)<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41586-021-03485-4\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/arxiv.org\/pdf\/2105.09305\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a> Accepted manuscript with minor post-acceptance corrections<\/p>\n\n\n\n<p class=\"justify-text\">&#8220;On 31 August 2019, an interstellar comet was discovered as it passed through the Solar System (2I\/Borisov). On the basis of initial imaging observations, 2I\/Borisov seemed to be similar to ordinary Solar System comets1,2\u2014an unexpected characteristic given the multiple peculiarities of the only known previous interstellar visitor, 1I\/\u2018Oumuamua3,4,5,6. Spectroscopic investigations of 2I\/Borisov identified the familiar cometary emissions from CN (refs. 7,8,9), C2 (ref. 10), O i (ref. 11), NH2 (ref. 12), OH (ref. 13), HCN (ref. 14) and CO (refs. 14,15), revealing a composition similar to that of carbon monoxide-rich Solar System comets. At temperatures greater than 700 kelvin, comets also show metallic vapours that are produced by the sublimation of metal-rich dust grains16. Observation of gaseous metals had until very recently17 been limited to bright sunskirting and sungrazing comets18,19,20 and giant star-plunging exocomets21. Here we report spectroscopic observations of atomic nickel vapour in the cold coma of 2I\/Borisov at a heliocentric distance of 2.322 astronomical units\u2014equivalent to an equilibrium temperature of 180 kelvin. Nickel in 2I\/Borisov seems to originate from a short-lived nickel-containing molecule with a lifetime of 340+260\u2212200 seconds at 1 astronomical unit and is produced at a rate of 0.9 \u00b1 0.3 \u00d7 1022 atoms per second, or 0.002 per cent relative to OH and 0.3 per cent relative to CN. The detection of gas-phase nickel in the coma of 2I\/Borisov is in line with the recent identification of this atom\u2014as well as iron\u2014in the cold comae of Solar System comets17.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Piotr Guzik &amp; Micha\u0142 Drahus Nature volume 593, pages 375\u2013378 (2021) LINK PDF (OPEN ACCESS) Accepted manuscript with minor post-acceptance corrections &#8220;On 31 August 2019, an interstellar comet was discovered as it passed through the&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[179],"tags":[5942,1870,2413],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27800"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=27800"}],"version-history":[{"count":3,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27800\/revisions"}],"predecessor-version":[{"id":27814,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27800\/revisions\/27814"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}