{"id":5,"date":"2025-01-08T15:40:38","date_gmt":"2025-01-08T20:40:38","guid":{"rendered":"https:\/\/sites.bu.edu\/karkarelab\/bu-experimental-cosmology\/"},"modified":"2026-03-15T16:23:37","modified_gmt":"2026-03-15T20:23:37","slug":"bu-experimental-cosmology","status":"publish","type":"page","link":"https:\/\/sites.bu.edu\/karkarelab\/","title":{"rendered":"Home"},"content":{"rendered":"<h3 style=\"text-align: center;\"><strong>How did the Big Bang happen?<\/strong><\/h3>\n<h3 style=\"text-align: center;\"><strong>Why is the universe&#8217;s expansion accelerating?<\/strong><\/h3>\n<h3 style=\"text-align: center;\"><strong>What did the first stars and galaxies look like?<\/strong><\/h3>\n<p>&nbsp;<\/p>\n<p>In the <span style=\"color: #ff0000;\"><strong>BU Experimental Cosmology Lab<\/strong><\/span>, we are answering these questions by building instruments to map the sky at millimeter wavelengths. By measuring<\/p>\n<ul>\n<li>the <a href=\"https:\/\/sites.bu.edu\/karkarelab\/cmb\/\"><strong>Cosmic Microwave Background (CMB) <\/strong><\/a>&#8211; the leftover radiation from the Big Bang &#8211; and<\/li>\n<li>Distant galaxies using the <a href=\"https:\/\/sites.bu.edu\/karkarelab\/lim\/\"><strong>Line Intensity Mapping (LIM)<\/strong><\/a> technique,<\/li>\n<\/ul>\n<p>we can learn about the history of the universe and the fundamental physics driving its evolution.<\/p>\n<p>Our instruments are deployed to telescopes at high, dry sites around the world, including the Amundsen-Scott South Pole Station. We are a part of the <a href=\"https:\/\/sites.bu.edu\/cosmology\/\">BU Cosmology Group<\/a> and several CMB and LIM collaborations:<\/p>\n<table width=\"416\" height=\"208\">\n<tbody>\n<tr>\n<td><img loading=\"lazy\" src=\"\/karkarelab\/files\/2025\/01\/b3_crop-636x636.jpg\" alt=\"\" width=\"150\" height=\"150\" class=\"center aligncenter wp-image-71 \" srcset=\"https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-636x636.jpg 636w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-1024x1024.jpg 1024w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-150x150.jpg 150w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-768x768.jpg 768w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-1536x1536.jpg 1536w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-2048x2048.jpg 2048w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-550x550.jpg 550w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-710x710.jpg 710w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-300x300.jpg 300w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/b3_crop-600x600.jpg 600w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/p>\n<h4 style=\"text-align: center;\"><a href=\"http:\/\/bicepkeck.org\">BICEP<\/a><\/h4>\n<\/td>\n<td><img loading=\"lazy\" src=\"\/karkarelab\/files\/2025\/01\/spt_crop-636x636.jpg\" alt=\"\" width=\"150\" height=\"150\" class=\"center wp-image-48 aligncenter\" srcset=\"https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/spt_crop-636x636.jpg 636w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/spt_crop-1024x1024.jpg 1024w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/spt_crop-150x150.jpg 150w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/spt_crop-768x768.jpg 768w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/spt_crop-550x550.jpg 550w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/spt_crop-710x710.jpg 710w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/spt_crop-300x300.jpg 300w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/spt_crop-600x600.jpg 600w, https:\/\/sites.bu.edu\/karkarelab\/files\/2025\/01\/spt_crop.jpg 1225w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/p>\n<h4 style=\"text-align: center;\"><a href=\"https:\/\/arxiv.org\/abs\/2111.04631\">SPT-SLIM<\/a><\/h4>\n<\/td>\n<td><img loading=\"lazy\" src=\"\/karkarelab\/files\/2025\/01\/superspec_crop-636x636.jpg\" alt=\"\" width=\"150\" height=\"150\" class=\"center wp-image-48 aligncenter\" \/><\/p>\n<h4 style=\"text-align: center;\"><a href=\"https:\/\/science.jpl.nasa.gov\/projects\/superspec\/\">SuperSpec<\/a><\/h4>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>Interested in joining us? Please email Prof. Karkare with any questions.<\/h4>\n<hr \/>\n<p><span><br \/>\nPhoto credits: Steffen Richter, Sam Harrison, Erik Shirokoff, Brad Benson<br \/>\n<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>How did the Big Bang happen? Why is the universe&#8217;s expansion accelerating? What did the first stars and galaxies look like? &nbsp; In the BU Experimental Cosmology Lab, we are answering these questions by building instruments to map the sky at millimeter wavelengths. By measuring the Cosmic Microwave Background (CMB) &#8211; the leftover radiation from [&hellip;]<\/p>\n","protected":false},"author":24451,"featured_media":0,"parent":0,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/sites.bu.edu\/karkarelab\/wp-json\/wp\/v2\/pages\/5"}],"collection":[{"href":"https:\/\/sites.bu.edu\/karkarelab\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.bu.edu\/karkarelab\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.bu.edu\/karkarelab\/wp-json\/wp\/v2\/users\/24451"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.bu.edu\/karkarelab\/wp-json\/wp\/v2\/comments?post=5"}],"version-history":[{"count":26,"href":"https:\/\/sites.bu.edu\/karkarelab\/wp-json\/wp\/v2\/pages\/5\/revisions"}],"predecessor-version":[{"id":135,"href":"https:\/\/sites.bu.edu\/karkarelab\/wp-json\/wp\/v2\/pages\/5\/revisions\/135"}],"wp:attachment":[{"href":"https:\/\/sites.bu.edu\/karkarelab\/wp-json\/wp\/v2\/media?parent=5"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}