{"id":30942,"date":"2020-07-20T21:34:00","date_gmt":"2020-07-20T18:34:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/could-mini-neptunes-be-irradiated-ocean-planets\/"},"modified":"2020-07-20T21:34:00","modified_gmt":"2020-07-20T18:34:00","slug":"could-mini-neptunes-be-irradiated-ocean-planets","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/could-mini-neptunes-be-irradiated-ocean-planets\/","title":{"rendered":"#Could mini-Neptunes be irradiated ocean planets?"},"content":{"rendered":"

“#Could mini-Neptunes be irradiated ocean planets?<\/strong>”<\/p>\n

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Many exoplanets known today are ‘super-Earths,’ with a radius 1.3 times that of Earth, and ‘mini-Neptunes,’ with 2.4 Earth radii. Mini-Neptunes, which are less dense, were long thought to be gas planets, made up of hydrogen and helium. Now, scientists at the Laboratoire d’Astrophysique de Marseille (CNRS\/Aix-Marseille Universit\u00e9\/Cnes) have examined a new possibility, namely that the low density of mini-Neptunes could be explained simply by the presence of a thick layer of water that experiences an intense greenhouse effect caused by the irradiation from their host star.<\/p>\n

These findings, recently published in Astrophysical Journal Letters<\/i>, show that mini-Neptunes could be super-Earths with a rocky core surrounded by water in a supercritical state, suggesting that these two types of exoplanet may form in the same way. Another paper recently published in Astronomy & Astrophysics<\/i>, involving scientists mainly from the CNRS and the University of Bordeaux, focused on the effect of stellar irradiation on the radius of Earth-sized planets containing water. Their work shows that the size of the atmospheres of such planets increases considerably when subject to a strong greenhouse effect, in line with the study on mini-Neptunes. Future observations should make it possible to test these novel hypotheses put forward by French scientists, who are making major contributions to our knowledge of exoplanets.<\/p>\n

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\n More information:<\/strong>
\n Olivier Mousis et al, Irradiated Ocean Planets Bridge Super-Earth and Sub-Neptune Populations, The Astrophysical Journal<\/i> (2020). DOI: 10.3847\/2041-8213\/ab9530\n <\/div>\n
\n Citation<\/strong>:
\n Could mini-Neptunes be irradiated ocean planets? (2020, July 20)
\n retrieved 20 July 2020
\n from https:\/\/phys.org\/news<\/a>\/2020-07-mini-neptunes-irradiated-ocean-planets.html<\/p>\n

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“#Could mini-Neptunes be irradiated ocean planets?” Credit: CC0 Public Domain Many exoplanets known today are ‘super-Earths,’ with a radius 1.3 times that of Earth, and ‘mini-Neptunes,’ with 2.4 Earth radii. Mini-Neptunes, which are less dense, were long thought to be gas planets, made up of hydrogen and helium. Now, scientists at the Laboratoire d’Astrophysique de…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[5017,41545],"class_list":["post-30942","post","type-post","status-publish","format-standard","hentry","category-sciencee","tag-astronomy","tag-could-mini-neptunes-be-irradiated-ocean-planets"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/30942","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=30942"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/30942\/revisions"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=30942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=30942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=30942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}