TY - JOUR
T1 - CHARACTERIZATION of the INNER DISK AROUND HD 141569 A from KECK/NIRC2 L-BAND VORTEX CORONAGRAPHY
AU - Mawet, Dimitri
AU - Choquet, Élodie
AU - Absil, Olivier
AU - Huby, Elsa
AU - Bottom, Michael
AU - Serabyn, Eugene
AU - Femenia, Bruno
AU - Lebreton, Jérémy
AU - Matthews, Keith
AU - Gonzalez, Carlos A.Gomez
AU - Wertz, Olivier
AU - Carlomagno, Brunella
AU - Christiaens, Valentin
AU - Defrère, Denis
AU - Delacroix, Christian
AU - Forsberg, Pontus
AU - Habraken, Serge
AU - Jolivet, Aissa
AU - Karlsson, Mikael
AU - Milli, Julien
AU - Pinte, Christophe
AU - Piron, Pierre
AU - Reggiani, Maddalena
AU - Surdej, Jean
AU - Catalan, Ernesto Vargas
PY - 2017/1/1
Y1 - 2017/1/1
N2 - HD 141569 A is a pre-main sequence B9.5 Ve star surrounded by a prominent and complex circumstellar disk, likely still in a transition stage from protoplanetary to debris disk phase. Here, we present a new image of the third inner disk component of HD 141569 A made in the L′ band (3.8 μm) during the commissioning of the vector vortex coronagraph that has recently been installed in the near-infrared imager and spectrograph NIRC2 behind the W.M. Keck Observatory Keck II adaptive optics system. We used reference point-spread function subtraction, which reveals the innermost disk component from the inner working distance of ≃23 au and up to ≃70 au. The spatial scale of our detection roughly corresponds to the optical and near-infrared scattered light, thermal Q, N, and 8.6 μm PAH emission reported earlier. We also see an outward progression in dust location from the L′ band to the H band (Very Large Telescope/SPHERE image) to the visible (Hubble Space Telescope (HST)/STIS image), which is likely indicative of dust blowout. The warm disk component is nested deep inside the two outer belts imaged by HST-NICMOS in 1999 (at 406 and 245 au, respectively). We fit our new L′-band image and spectral energy distribution of HD 141569 A with the radiative transfer code MCFOST. Our best-fit models favor pure olivine grains and are consistent with the composition of the outer belts. While our image shows a putative very faint point-like clump or source embedded in the inner disk, we did not detect any true companion within the gap between the inner disk and the first outer ring, at a sensitivity of a few Jupiter masses.
AB - HD 141569 A is a pre-main sequence B9.5 Ve star surrounded by a prominent and complex circumstellar disk, likely still in a transition stage from protoplanetary to debris disk phase. Here, we present a new image of the third inner disk component of HD 141569 A made in the L′ band (3.8 μm) during the commissioning of the vector vortex coronagraph that has recently been installed in the near-infrared imager and spectrograph NIRC2 behind the W.M. Keck Observatory Keck II adaptive optics system. We used reference point-spread function subtraction, which reveals the innermost disk component from the inner working distance of ≃23 au and up to ≃70 au. The spatial scale of our detection roughly corresponds to the optical and near-infrared scattered light, thermal Q, N, and 8.6 μm PAH emission reported earlier. We also see an outward progression in dust location from the L′ band to the H band (Very Large Telescope/SPHERE image) to the visible (Hubble Space Telescope (HST)/STIS image), which is likely indicative of dust blowout. The warm disk component is nested deep inside the two outer belts imaged by HST-NICMOS in 1999 (at 406 and 245 au, respectively). We fit our new L′-band image and spectral energy distribution of HD 141569 A with the radiative transfer code MCFOST. Our best-fit models favor pure olivine grains and are consistent with the composition of the outer belts. While our image shows a putative very faint point-like clump or source embedded in the inner disk, we did not detect any true companion within the gap between the inner disk and the first outer ring, at a sensitivity of a few Jupiter masses.
KW - planet-disk interactions
KW - planetary systems
KW - planets and satellites: formation
KW - protoplanetary disks
KW - stars: pre-main sequence
KW - stars: variables: T Tauri, Herbig Ae/Be
UR - http://www.scopus.com/inward/record.url?scp=85009090973&partnerID=8YFLogxK
U2 - 10.3847/1538-3881/153/1/44
DO - 10.3847/1538-3881/153/1/44
M3 - Article
AN - SCOPUS:85009090973
SN - 0004-6256
VL - 153
JO - The Astronomical Journal
JF - The Astronomical Journal
IS - 1
M1 - 44
ER -