SIMBAD references

2019ApJ...877L..33C - Astrophys. J., 877, L33-L33 (2019/June-1)

Evidence for a circumplanetary disk around protoplanet PDS 70 b.

CHRISTIAENS V., CANTALLOUBE F., CASASSUS S., PRICE D.J., ABSIL O., PINTE C., GIRARD J. and MONTESINOS M.

Abstract (from CDS):

We present the first observational evidence for a circumplanetary disk (CPD) around the protoplanet PDS 70 b, based on a new spectrum in the K-band acquired with Very Large Telescope/SINFONI. We tested three hypotheses to explain the spectrum: atmospheric emission from the planet with either (1) a single value of extinction, (2) a variable extinction, and (3) a combined atmospheric and CPD model. Goodness-of-fit indicators favor the third option, suggesting that circumplanetary material contributes excess thermal emission-most prominent at λ >= 2.3 µm. Inferred accretion rates (∼10–7.8-10–7.3 MJ yr–1) are compatible with observational constraints based on the Hα and Brγ lines. For the planet, we derive an effective temperature of 1500-1600 K, surface gravity log(g)∼4.0, radius ∼1.6RJ, mass ∼10MJ, and possible thick clouds. Models with variable extinction lead to slightly worse fits. However, the amplitude (ΔAV >= 3 mag) and timescale of variation (<=years) required for the extinction would also suggest circumplanetary material.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): planet-disk interactions - planets and satellites: formation - protoplanetary disks - stars: individual: PDS 70 - techniques: image processing

Simbad objects: 7

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2019ApJ...877L..33C and select 'bookmark this link' or equivalent in the popup menu


2021.03.07-15:49:21

© Université de Strasbourg/CNRS

    • Contact