094208
收藏DataCite Commons2026-03-09 更新2026-05-03 收录
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http://esdcdoi.esac.esa.int/doi/html/data/astronomy/xmm-newton/094208.html
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Our observations have detected for the first time escaping atmospheres aroundmultiple young mini-Neptunes. Mass loss from mini-Neptunes shapes exoplanetdemographics but the X-ray and extreme UV spectrum of the star is necessary foroutflow models. EUV cannot be measured due to ISM absorption and must beinferred from the X-ray spectrum. We propose a continuation of our survey fromAO-20/21 measuring the X-ray spectra of four new young mini-Neptune hosts thathave or will have escaping helium measurements. This would double the sample ofyoung mini Neptunes with both helium and X-ray observations. The data will beimportant to modelling the outflow rate and temperature which reveal the natureof the outflow (photoevaporative vs. core-powered) and the fate of these planets. [truncated! Please see actual data for full text]
提供机构:
European Space Agency
创建时间:
2026-03-09



