Iglesias, D. P.
Mustill, A. J.
AffiliationUniv Arizona, Dept Astron, Steward Observ
MetadataShow full item record
PublisherEDP SCIENCES S A
CitationExocomet signatures around the A-shell star φ Leonis? 2016, 594:L1 Astronomy & Astrophysics
JournalAstronomy & Astrophysics
Rights© ESO, 2016.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractWe present an intensive monitoring of high-resolution spectra of the Ca II K line in the A7IV shell star phi Leo at very short (minutes, hours), short (night to night), and medium (weeks, months) timescales. The spectra show remarkable variable absorptions on timescales of hours, days, and months. The characteristics of these sporadic events are very similar to most that are observed toward the debris disk host star beta Pic, which are commonly interpreted as signs of the evaporation of solid, comet-like bodies grazing or falling onto the star. Therefore, our results suggest the presence of solid bodies around phi Leo. To our knowledge, with the exception of beta Pic, our monitoring has the best time resolution at the mentioned timescales for a star with events attributed to exocomets. Assuming the cometary scenario and considering the timescales of our monitoring, our results indicate that phi Leo presents the richest environment with comet-like events known to date, second only to beta Pic.
NoteOpen access journal.
VersionFinal published version
SponsorsSpanish grant [AYA 2014-55840-P]; ALMA/Conicyt Project