No Clear, Direct Evidence for Multiple Protoplanets Orbiting LkCa 15: LkCa 15 bcd are Likely Inner Disk Signals

Vista sencilla de ítem
dc.contributor.authorCurrie, Thayne
dc.contributor.authorMarois, Christian
dc.contributor.authorCieza, Lucas
dc.contributor.authorMulders, Gijs D.
dc.contributor.authorLawson, Kellen
dc.contributor.authorCaceres, Claudio
dc.contributor.authorRodriguez-Ruiz, Dary
dc.contributor.authorWisniewski, John
dc.contributor.authorGuyon, Olivier
dc.contributor.authorBrandt, Timothy D.
dc.contributor.authorKasdin, N. Jeremy
dc.contributor.authorGroff, Tyler D.
dc.contributor.authorLozi, Julien
dc.contributor.authorChilcote, Jeffrey
dc.contributor.authorHodapp, Klaus
dc.contributor.authorJovanovic, Nemanja
dc.contributor.authorMartinache, Frantz
dc.contributor.authorSkaf, Nour
dc.contributor.authorLyra, Wladimir
dc.contributor.authorTamura, Motohide
dc.contributor.authorAsensio-Torres, Ruben
dc.contributor.authorDong, Ruobing
dc.contributor.authorGrady, Carol
dc.contributor.authorGerard, Benjamin
dc.contributor.authorFukagawa, Misato
dc.contributor.authorHand, Derek
dc.contributor.authorHayashi, Masahiko
dc.contributor.authorHenning, Thomas
dc.contributor.authorKudo, Tomoyuki
dc.contributor.authorKuzuhara, Masayuki
dc.contributor.authorKwon, Jungmi
dc.contributor.authorMcElwain, Michael W.
dc.contributor.authorUyama, Taichi
dc.date.accessioned2024-06-14T16:55:40Z
dc.date.available2024-06-14T16:55:40Z
dc.date.issued2019-05-20
dc.descriptionIndexación: Scopus.
dc.description.abstractTwo studies utilizing sparse aperture-masking (SAM) interferometry and Hα differential imaging have reported multiple Jovian companions around the young solar-mass star, LkCa 15 (LkCa 15 bcd): the first claimed direct detection of infant, newly formed planets ("protoplanets"). We present new near-infrared direct imaging/spectroscopy from the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system coupled with Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) integral field spectrograph and multi-epoch thermal infrared imaging from Keck/NIRC2 of LkCa 15 at high Strehl ratios. These data provide the first direct imaging look at the same wavelengths and in the same locations where previous studies identified the LkCa 15 protoplanets, and thus offer the first decisive test of their existence. The data do not reveal these planets. Instead, we resolve extended emission tracing a dust disk with a brightness and location comparable to that claimed for LkCa 15 bcd. Forward-models attributing this signal to orbiting planets are inconsistent with the combined SCExAO/CHARIS and Keck/NIRC2 data. An inner disk provides a more compelling explanation for the SAM detections and perhaps also the claimed Hα detection of LkCa 15 b. We conclude that there is currently no clear, direct evidence for multiple protoplanets orbiting LkCa 15, although the system likely contains at least one unseen Jovian companion. To identify Jovian companions around LkCa 15 from future observations, the inner disk should be detected and its effect modeled, removed, and shown to be distinguishable from planets. Protoplanet candidates identified from similar systems should likewise be clearly distinguished from disk emission through modeling.
dc.description.urihttps://iopscience.iop.org/article/10.3847/2041-8213/ab1b42/pdf
dc.identifier.citationAstrophysical Journal Letters olume 877, Issue 1 20 May 2019 Article number L3
dc.identifier.doi10.3847/2041-8213/ab1b42
dc.identifier.issn2041-8205
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/57604
dc.language.isoen_US
dc.publisherInstitute of Physics Publishing
dc.rights.licenseATRIBUCIÓN 4.0 INTERNACIONAL
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectHerbig Ae/Be
dc.subjectinstrumentation: high angular resolution
dc.subjectplanetary systems; stars: individual (LkCa 15)
dc.subjectstars: variables: T Tauri
dc.subjecttechniques: image processing
dc.subjecttechniques: image processing: variables: T Tauri
dc.titleNo Clear, Direct Evidence for Multiple Protoplanets Orbiting LkCa 15: LkCa 15 bcd are Likely Inner Disk Signals
dc.typeArtículo
Archivos
Bloque original
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
Currie_2019_ApJL_877_L3.pdf
Tamaño:
1.36 MB
Formato:
Adobe Portable Document Format
Descargar
Bloque de licencias
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
license.txt
Tamaño:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descripción:
Descargar
Colecciones
FCE - Artículos de Revista