Large Binocular Telescope Search for Companions and Substructures in the (Pre)transitional Disk of AB Aurigae

Sebastián Jorquera, Mickaël Bonnefoy, Sarah Betti, Gaël Chauvin, Esther Buenzli, Laura M. Pérez, Katherine B. Follette, Philip M. Hinz, Anthony Boccaletti, Vanessa Bailey, Beth Biller, Denis Defrère, Josh Eisner, Thomas Henning, Hubert Klahr, Jarron Leisenring, Johan Olofsson, Joshua E. Schlieder, Andrew J. Skemer, Michael F. SkrutskieRoy Van Boekel

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Multiwavelength high-resolution imaging of protoplanetary disks has revealed the presence of multiple, varied substructures in their dust and gas components, which might be signposts of young, forming planetary systems. AB Aurigae bears an emblematic (pre)transitional disk showing spiral structures observed in the inner cavity of the disk in both the submillimeter (Atacama Large Millimeter/submillimeter Array (ALMA); 1.3 mm, 12CO) and near-infrared (Spectro-polarimetric High-contrast Exoplanet Research; 1.5-2.5 μm) wavelengths, which have been claimed to arise from dynamical interactions with a massive companion. In this work, we present new deep K s (2.16 μm) and L′ (3.7 μm) band images of AB Aurigae obtained with the L/M-band Infrared Camera on the Large Binocular Telescope, aimed for the detection of both planetary companions and extended disk structures. No point source is recovered, in particular at the outer regions of the disk, where a putative candidate (ρ = 0.″681, PA = 7.°6) had been previously claimed. The nature of a second innermost planet candidate (ρ = 0.″16, PA = 203.°9) cannot be investigated by the new data. We are able to derive 5σ detection limits in both magnitude and mass for the system, going from 14 M Jup at 0.″3 (49 au) down to 3-4 M Jup at 0.″6 (98 au) and beyond, based on the ATMO 2020 evolutionary models. We detect the inner spiral structures (<0.″5) resolved in both CO and polarimetric H-band observations. We also recover the ring structure of the system at larger separation (0.″5-0.″7) showing a clear southeast/northwest asymmetry. This structure, observed for the first time at L′ band, remains interior to the dust cavity seen at ALMA, suggesting an efficient dust trapping mechanism at play in the disk.

Original languageEnglish (US)
Article number71
JournalAstrophysical Journal
Volume926
Issue number1
DOIs
StatePublished - Feb 1 2022

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Large Binocular Telescope Search for Companions and Substructures in the (Pre)transitional Disk of AB Aurigae'. Together they form a unique fingerprint.

Cite this