{"id":124293,"date":"2021-06-26T09:22:28","date_gmt":"2021-06-26T16:22:28","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2021\/06\/strange-ghostly-galaxies-lacking-dark-matter-confirmed"},"modified":"2021-06-26T09:22:28","modified_gmt":"2021-06-26T16:22:28","slug":"strange-ghostly-galaxies-lacking-dark-matter-confirmed","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2021\/06\/strange-ghostly-galaxies-lacking-dark-matter-confirmed","title":{"rendered":"Strange Ghostly Galaxies Lacking Dark Matter Confirmed"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/strange-ghostly-galaxies-lacking-dark-matter-confirmed3.jpg\"><\/a><\/p>\n<p>The most accurate distance measurement yet of ultra-diffuse galaxy (UDG) NGC1052-DF2 (DF2) confirms beyond any shadow of a doubt that it is lacking in dark matter. The newly measured distance of 22.1 +\/-1.2 megaparsecs was obtained by an international team of researchers led by Zili Shen and Pieter van Dokkum of Yale University and Shany Danieli, a NASA Hubble Fellow at the Institute for Advanced Study.<\/p>\n<p>\u201cDetermining an accurate distance to DF2 has been key in supporting our earlier results,\u201d stated Danieli. \u201cThe new measurement reported in this study has crucial implications for estimating the physical properties of the galaxy, thus confirming its lack of dark matter.\u201d<\/p>\n<p>The results, published in <em>Astrophysical Journal Letters<\/em> on June 9, 2021, are based on 40 orbits of NASA\u2019s Hubble Space Telescope, with imaging by the Advanced Camera for Surveys and a \u201ctip of the red giant branch\u201d (TRGB) analysis, the gold standard for such refined measurements. In 2019, the team published <a href=\"https:\/\/arxiv.org\/abs\/1910.07529\">results<\/a> measuring the distance to neighboring UDG NGC1052-DF4 (DF4) based on 12 Hubble orbits and TRGB analysis, which provided compelling evidence of missing dark matter. This preferred method expands on the <a href=\"https:\/\/scitechdaily.com\/hubble-telescope-discovers-galaxy-with-no-dark-matter\/\">team\u2019s<\/a> 2018 studies that relied on \u201csurface brightness fluctuations\u201d to gauge distance. Both galaxies were discovered with the Dragonfly Telephoto Array at the New Mexico Skies observatory.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The most accurate distance measurement yet of ultra-diffuse galaxy (UDG) NGC1052-DF2 (DF2) confirms beyond any shadow of a doubt that it is lacking in dark matter. The newly measured distance of 22.1 +\/-1.2 megaparsecs was obtained by an international team of researchers led by Zili Shen and Pieter van Dokkum of Yale University and Shany [\u2026]<\/p>\n","protected":false},"author":396,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[],"class_list":["post-124293","post","type-post","status-publish","format-standard","hentry","category-cosmology"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/124293","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/396"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=124293"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/124293\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=124293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=124293"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=124293"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}