STRUCTURES IN THE PROTOPLANETARY DISK OF HD142527 SEEN IN POLARIZED SCATTERED LIGHT

By H. Avenhaus, Sascha P. Quanz, H. Schmid, M. Meyer, A. Garufi, S. Wolf, C. Dominik. 2013

152 citations recorded by the source corpus.

We present H- and Ks-band polarized differential images of the Herbig Ae/Be star HD142527, revealing its optically thick outer disk and the nearly empty gap. The very small inner working angle (∼0.″1) and high-resolution achievable with an 8 m class telescope, together with a careful polarimetric calibration strategy, allow us to achieve images that surpass the quality of previous scattered-light images. Previously known substructures are resolved more clearly and new structures are seen. Specifically, we are able to resolve (1) half a dozen spiral structures in the disk, including previously known outer-disk spirals as well as new spiral arms and arcs close to the inner rim of the disk, (2) peculiar holes in the polarized surface brightness at position angles (P.A.'s) of ∼0° and ∼160°, (3) the inner rim on the eastern side of the disk, and (4) the gap between the outer and inner disk, ranging from the inner working angle of 0.″1 out to between 0.″7 and 1.″0, which is nearly devoid of dust. We then use a Markov Chain Monte Carlo algorithm to determine several structural parameters of the disk, using very simple assumptions, including its inclination, eccentricity, and the scale height of the inner rim. We compare our results with previous work on this object and try to produce a consistent picture of the system and its transition disk.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/4f542b5b8f8d497fe96744a7af5fbcaddde4eb7d

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In Astronomy and Astrophysics

1. T. Birnstiel
2. D. Wilner
3. S. Andrews
4. Xue-Ning Bai
5. C. Dullemond
6. Anders Johansen
7. Zhaohuan Zhu
8. A. Hughes

In Instrumentation

1. S. Andrews
2. T. Birnstiel
3. D. Wilner
4. Xue-Ning Bai
5. Zhaohuan Zhu
6. Anders Johansen
7. R. Dong
8. A. Hughes

Citations in the corpus

• Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70 (2018, methodology): “…recent highresolution imaging observations of TDs at different wavelengths have revealed large gaps (e.g. Thalmann et al. 2010; Andrews et al. 2011; Avenhaus et al. 2014b; Perez et al. 2015; Pohl et al. 2017b; Hendler et al. 2018), azimuthal asymmetries (e.g. Casassus et al. 2013; van der Marel et…”
• Dust Evolution and the Formation of Planetesimals (2016, background): “Imaging with VLT/NACO revealed gaps, brightness asymmetries, or spiral patterns that might be indicative of planets (e.g., Quanz et al. 2013a,b; Avenhaus et al. 2014).”
• Three Radial Gaps in the Disk of TW Hydrae Imaged with SPHERE (2016, unknown): “Finally, the azimuthal Stokes components Qφ & Uφ are computed according to Avenhaus et al. (2014): Qφ= +Q cos(2φ) + U sin(2φ), (1) Uφ=−Q sin(2φ) + U cos(2φ), (2) with φ= arctan x− xstar y − ystar + θ. (3) The angle θ is the offset of φ= 0 with the y-axis of the image, which is 0 for the ZIMPOL…”
• SHADOWS CAST BY A WARP IN THE HD 142527 PROTOPLANETARY DISK (2014, background): “Recent polarized differential imaging (PDI) of HD 142527 at H- and Ks-bands revealed a striking view of its dustdepleted gap, outer disk and spiral structures (Canovas et al. 2013; Avenhaus et al. 2014; Rodigas et al. 2014).”
• Disks around T Tauri Stars with SPHERE (DARTTS-S). I. SPHERE/IRDIS Polarimetric Imaging of Eight Prominent T Tauri Disks (2018, methodology): “In RXJ  1615, MY  Lup, PDS  66, and V4046  Sgr, full rings are seen, while DoAr  44 potentially shows a broken ring, resembling a smaller version of the HD 142527 disk ( Avenhaus et al. 2014b, 2017 ) , very close to the coronagraph edge ( discussed in more detail in Casassus et al. ( 2018 ) .”
• Observational Signatures of Planets in Protoplanetary Disks I: Gaps Opened by Single and Multiple Young Planets in Disks (2014, methodology): “…imaged by 10-meter class mirrors, in particular VLT (e.g. Quanz et al. 2011, 2012; Canovas et al. 2013; Quanz et al. 2013; Garufi et al. 2013, 2014; Avenhaus et al. 2014) and Subaru (the Subaru Strategic Exploration of Exoplanets and Disks Survey, Tamura 2009; Tsukagoshi et al. 2014; Takami et al.…”
• Shadows and spirals in the protoplanetary disk HD 100453 (2016, background): “Shadows have now been detected in a handful of disks (Stolker et al. 2016a; Pinilla et al. 2015b; Canovas et al. 2016; Avenhaus et al. 2014).”
• The Disk Substructures at High Angular Resolution Project (DSHARP). I. Motivation, Sample, Calibration, and Overview (2018, background): “Similar features have been identified from the IR starlight scattered off the disk atmospheres (e.g., Muto et al. 2012; Grady et al. 2013; Quanz et al. 2013; Avenhaus et al. 2014; Rapson et al. 2015; Benisty et al. 2015; de Boer et al. 2016; Ginski et al. 2016; Akiyama et al. 2016).”