dc.contributor.author | Wakeford, HR | |
dc.contributor.author | Sing, DK | |
dc.contributor.author | Kataria, T | |
dc.contributor.author | Deming, D | |
dc.contributor.author | Nikolov, N | |
dc.contributor.author | Lopez, E | |
dc.contributor.author | Tremblin, P | |
dc.contributor.author | Amundsen, DS | |
dc.contributor.author | Lewis, N | |
dc.contributor.author | Mandell, A | |
dc.contributor.author | Fortney, JJ | |
dc.contributor.author | Knutson, H | |
dc.contributor.author | Benneke, B | |
dc.contributor.author | Evans, T | |
dc.date.accessioned | 2017-05-18T12:42:47Z | |
dc.date.issued | 2017-05-12 | |
dc.description.abstract | A correlation between giant-planet mass and atmospheric heavy elemental abundance was first noted in the past century from observations of planets in our own Solar System and has served as a cornerstone of planet-formation theory. Using data from the Hubble and Spitzer Space Telescopes from 0.5 to 5 micrometers, we conducted a detailed atmospheric study of the transiting Neptune-mass exoplanet HAT-P-26b. We detected prominent H2O absorption bands with a maximum base-to-peak amplitude of 525 parts per million in the transmission spectrum. Using the water abundance as a proxy for metallicity, we measured HAT-P-26b’s atmospheric heavy element content (Embedded Image times solar). This likely indicates that HAT-P-26b’s atmosphere is primordial and obtained its gaseous envelope late in its disk lifetime, with little contamination from metal-rich planetesimals. | en_GB |
dc.description.sponsorship | Support for this work was provided by NASA through grants under the HST-GO-14260 program from the STSci. H.R.W. acknowledges support from the NASA Postdoctoral Program, administered by Universities Space Research Association through a contract with NASA. Several authors acknowledge funding from the European Research Council under the European Union Seventh Framework Program: D.K.S., T.K., N.N., and T.M.E. under grant 336792; E.D.L. under grant 313014; and P.T. and D.S.A. under grant 247060-PEPS. | en_GB |
dc.identifier.citation | Vol. 356, pp. 628 - 631 | en_GB |
dc.identifier.doi | 10.1126/science.aah4668 | |
dc.identifier.uri | http://hdl.handle.net/10871/27581 | |
dc.language.iso | en | en_GB |
dc.publisher | American Association for the Advancement of Science | en_GB |
dc.title | HAT-P-26b: A Neptune-mass exoplanet with a well-constrained heavy element abundance | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2017-05-18T12:42:47Z | |
dc.description | This is the author accepted manuscript. The final version is available from American Association for the Advancement of Science via the DOI in this record. | en_GB |
dc.identifier.journal | Science | en_GB |