Imaging the water snow-line during a protostellar outburst
Professor Advisor
dc.contributor.advisor
Cáceres, Claudio
Author
dc.contributor.author
Cieza González, Lucas
Author
dc.contributor.author
Casassus Montero, Simón
Author
dc.contributor.author
Tobin, John
Author
dc.contributor.author
Bos, Steven
Author
dc.contributor.author
Williams, Jonathan
Author
dc.contributor.author
Pérez, Sebastián
Author
dc.contributor.author
Zhu, Zhaohuan
Author
dc.contributor.author
Canovas, Héctor
Author
dc.contributor.author
Dunham, Michael
Author
dc.contributor.author
Hales, Antonio
Author
dc.contributor.author
Prieto, José
Author
dc.contributor.author
Principe, David
Author
dc.contributor.author
Schreiber, Matthias
Author
dc.contributor.author
Ruiz Rodríguez, Dary
Author
dc.contributor.author
Zurlo, Alice
Admission date
dc.date.accessioned
2016-12-06T13:59:31Z
Available date
dc.date.available
2016-12-06T13:59:31Z
Publication date
dc.date.issued
2016
Cita de ítem
dc.identifier.citation
Nature | Vol 5 3 5 | 1 4 J ul y 2 0 1 6
es_ES
Identifier
dc.identifier.other
10.1038/nature18612
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/141682
Abstract
dc.description.abstract
A snow-line is the region of a protoplanetary disk at which a major volatile, such as water or carbon monoxide, reaches its condensation temperature. Snow-lines play a crucial role in disk evolution by promoting the rapid growth of ice-covered grains(1-6). Signatures of the carbon monoxide snow-line (at temperatures of around 20 kelvin) have recently been imaged in the disks surrounding the pre-main-sequence stars TW Hydra(7-9) and HD163296 (refs 3, 10), at distances of about 30 astronomical units (AU) from the star. But the water snow-line of a protoplanetary disk (at temperatures of more than 100 kelvin) has not hitherto been seen, as it generally lies very close to the star (less than 5 au away for solar-type stars(11)). Water-ice is important because it regulates the efficiency of dust and planetesimal coagulation(5), and the formation of comets, ice giants and the cores of gas giants(12). Here we report images at 0.03-arcsec resolution (12 au) of the protoplanetary disk around V883 Ori, a protostar of 1.3 solar masses that is undergoing an outburst in luminosity arising from a temporary increase in the accretion rate(13). We find an intensity break corresponding to an abrupt change in the optical depth at about 42 au, where the elevated disk temperature approaches the condensation point of water, from which we conclude that the outburst has moved the water snow-line. The spectral behaviour across the snow-line confirms recent model predictions(14): dust fragmentation and the inhibition of grain growth at higher temperatures results in soaring grain number densities and optical depths. As most planetary systems are expected to experience outbursts caused by accretion during their formation(15,16), our results imply that highly dynamical water snow-lines must be considered when developing models of disk evolution and planet formation
es_ES
Patrocinador
dc.description.sponsorship
Millennium Science Initiative (Chilean Ministry of Economy) RC130007 IC120009
CONICYT FONDECYT grants 1140109 3150550 1151445 3140592
Spanish Ministerio de Economia y Competitividad AYA2014-55840P