Improving Planet Detection with Disk Modeling: Keck/NIRC2 Imaging of the HD 34282 Single-armed Protoplanetary Disk

Abstract

Formed in protoplanetary disks around young stars, giant planets can leave observational features such as spirals and gaps in their natal disks through planet-disk interactions. Although such features can indicate the existence of giant planets, protoplanetary disk signals can overwhelm the innate luminosity of planets. Therefore, in order to image planets that are embedded in disks, it is necessary to remove the contamination from the disks to reveal the planets possibly hiding within their natal environments. We observe and directly model the detected disk in the Keck/NIRC2 vortex coronagraph $L^{\prime }$-band observations of the single-armed protoplanetary disk around HD 34282. Despite a non-detection of companions for HD 34282, this direct disk modeling improves planet detection sensitivity by up to a factor of 2 in flux ratio and $\sim 10M_{\mathrm{Jupiter}}$ in mass. This suggests that performing disk modeling can improve directly imaged planet detection limits in systems with visible scattered light disks, and can help to better constrain the occurrence rates of self-luminous planets in these systems.

8 pages, 3 figures, 1 table, ApJ Letters accepted. Data files available in the ancillary folder

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Cited by in corpus (6)

• Protoplanetary disks in $K_s$-band total intensity and polarized light
• Mapping Protoplanetary Disk Vertical Structure with CO Isotopologue Line Emission
• ISPY-NACO Imaging Survey for Planets around Young stars. The demographics of forming planets embedded in protoplanetary disks
• exoALMA. XVII. Characterizing the Gas Dynamics around Dust Asymmetries
• The Appearance of Vortices in Protoplanetary Disks in Near-Infrared Scattered Light
• Multi-band reflectance and shadowing of RX J1604.3-2130 protoplanetary disk in scattered light