{"id":38724,"date":"2025-07-11T09:22:30","date_gmt":"2025-07-11T07:22:30","guid":{"rendered":"https:\/\/karmaka.de\/?p=38724"},"modified":"2025-07-11T09:22:39","modified_gmt":"2025-07-11T07:22:39","slug":"x-shooter-spectrum-of-comet-c-2025-n1-insights-into-a-distant-interstellar-visitor","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=38724","title":{"rendered":"X-SHOOTER Spectrum of Comet C\/2025 N1: Insights into a Distant Interstellar Visitor<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>A. Alvarez-Candal, J. L. Rizos, L. M. Lara, P. Santos-Sanz, P. J. Gutierrez, J. L. Ortiz, N. Morales, J. de Le\u00f3n<\/p>\n\n\n\n<p>Astronomy &amp; Astrophysics manuscript, submitted as Letter to the Editor<\/p>\n\n\n\n<p><a href=\"https:\/\/arxiv.org\/pdf\/2507.07312\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Comets are primitive remnants of the early Solar System whose composition offers fundamental clues to their formation and evolution. High-resolution, broad-wavelength spectroscopy is crucial for identifying volatile species and constraining the physical conditions within the coma. We aim to characterize the gas composition and physical environment of the newly discovered comet C\/2025 N1 through optical and near-infrared spectroscopy. We used a medium-resolution spectrum of comet C\/2025 N1 with X-shooter at the ESO Very Large Telescope (VLT), covering the 300-2500 nm wavelength range. Standard data reduction and flux calibration were applied. It corresponds to a spectral slope at least a factor of \u223c 1.86 higher than that of 2I\/Borisov. Although the object clearly shows activity, only upper limits to the production rates of OH and CN can be estimated: 8.0 \u00d7 1024 s\u22121 and 4.9 \u00d7 1023 s\u22121, respectively. We obtained red spectral slopes consistent with those of typical D-type asteroids and outer Solar System objects.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A. Alvarez-Candal, J. L. Rizos, L. M. Lara, P. Santos-Sanz, P. J. Gutierrez, J. L. Ortiz, N. Morales, J. de Le\u00f3n Astronomy &amp; Astrophysics manuscript, submitted as Letter to the Editor PDF (OPEN ACCESS) &#8220;Comets&#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":[6913,6919,6033],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38724"}],"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=38724"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38724\/revisions"}],"predecessor-version":[{"id":38726,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38724\/revisions\/38726"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=38724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=38724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=38724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}