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2021RNAAS...5....9U - Research Notes of the AAS, 5, 9 (2021/January-0)

Constraining PDS 70b's Formation Mechanism with Multi-hydrogen-emission Observations.

UYAMA T., HASHIMOTO J., BEICHMAN C.A., RUFFIO J.-B., AOYAMA Y., McELWAIN M.W. and DONG R.

Abstract (from CDS):

We present our Keck/OSIRIS observations of the Paβ emission line (1.282 μm) to investigate accretion mechanisms of PDS 70 planetary system. Our spectral differential imaging reduction to remove the stellar PSF resulted in null detection of Paβ at the locations of PDS 70b and c. The 5σ detection limit of Paβ compared with the theoretical model of Aoyama & Ikoma () indicates the gas velocity onto PDS 70b is smaller than 70 km s–1, which suggests MUSE-based Hα studies overestimated the gas velocity and the mass of PDS 70b.

Abstract Copyright: © 2021. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet astronomy

Simbad objects: 3

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