Molecules with ALMA at Planet-forming Scales (MAPS). III. Characteristics of Radial Chemical Substructures - Archive ouverte HAL Access content directly
Journal Articles The Astrophysical Journal Supplement Series Year : 2021

Molecules with ALMA at Planet-forming Scales (MAPS). III. Characteristics of Radial Chemical Substructures

, , , , , , , , , , , , (1) , , , , , , , , , (1) , , , (1) , , , , , , , , , ,
1
Charles J. Law
  • Function : Author
Ryan A. Loomis
  • Function : Author
Richard Teague
Karin I. Öberg
  • Function : Author
Ian Czekala
  • Function : Author
Sean M. Andrews
  • Function : Author
Jane Huang
  • Function : Author
Yuri Aikawa
Felipe Alarcón
  • Function : Author
Jaehan Bae
Edwin A. Bergin
  • Function : Author
Jennifer B. Bergner
  • Function : Author
Alice S. Booth
  • Function : Author
Arthur D. Bosman
  • Function : Author
Jenny K. Calahan
  • Function : Author
Gianni Cataldi
  • Function : Author
L. Ilsedore Cleeves
  • Function : Author
Kenji Furuya
  • Function : Author
Viviana V. Guzmán
  • Function : Author
John D. Ilee
  • Function : Author
Yao Liu
  • Function : Author
Feng Long
  • Function : Author
Hideko Nomura
Chunhua Qi
Kamber R. Schwarz
  • Function : Author
Anibal Sierra
  • Function : Author
Takashi Tsukagoshi
Yoshihide Yamato
  • Function : Author
Merel L. R. Van'T Hoff
  • Function : Author
Catherine Walsh
  • Function : Author
David J. Wilner
  • Function : Author
Ke Zhang
  • Function : Author

Abstract

The Molecules with ALMA at Planet-forming Scales (MAPS) Large Program provides a detailed, high-resolution (~10-20 au) view of molecular line emission in five protoplanetary disks at spatial scales relevant for planet formation. Here we present a systematic analysis of chemical substructures in 18 molecular lines toward the MAPS sources: IM Lup, GM Aur, AS 209, HD 163296, and MWC 480. We identify more than 200 chemical substructures, which are found at nearly all radii where line emission is detected. A wide diversity of radial morphologies-including rings, gaps, and plateaus-is observed both within each disk and across the MAPS sample. This diversity in line emission profiles is also present in the innermost 50 au. Overall, this suggests that planets form in varied chemical environments both across disks and at different radii within the same disk. Interior to 150 au, the majority of chemical substructures across the MAPS disks are spatially coincident with substructures in the millimeter continuum, indicative of physical and chemical links between the disk midplane and warm, elevated molecular emission layers. Some chemical substructures in the inner disk and most chemical substructures exterior to 150 au cannot be directly linked to dust substructure, however, which indicates that there are also other causes of chemical substructures, such as snowlines, gradients in UV photon fluxes, ionization, and radially varying elemental ratios. This implies that chemical substructures could be developed into powerful probes of different disk characteristics, in addition to influencing the environments within which planets assemble. This paper is part of the MAPS special issue of the Astrophysical Journal Supplement.

Dates and versions

insu-03672378 , version 1 (19-05-2022)

Identifiers

Cite

Charles J. Law, Ryan A. Loomis, Richard Teague, Karin I. Öberg, Ian Czekala, et al.. Molecules with ALMA at Planet-forming Scales (MAPS). III. Characteristics of Radial Chemical Substructures. The Astrophysical Journal Supplement Series, 2021, 257, ⟨10.3847/1538-4365/ac1434⟩. ⟨insu-03672378⟩
2 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More