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From Young to Older Disks: JWST/MIRI Evidence for Fading Molecular Emission and Hints for Elevated C/O in Upper Scorpius
Chengyan Xie, Ilaria Pascucci, Feng Long +23
We present JWST/MIRI spectroscopy of 14 disks in the older (~5-10 Myr) Upper Scorpius (USco) association and use slab of gas in local thermal equilibrium to infer basic gas propert…
Probing Dust in the MWC 480 Disk from Millimeter to Centimeter Wavelengths
Yangfan Shi, Feng Long, Enrique Macías +12
We present deep, high-resolution (100 mas) Karl G. Jansky Very Large Array (VLA) Ka-band (9.1 mm) observations of the disk around MWC 480, and infer dust properties through a…
MINDS. Strong oxygen depletion in the inner regions of a very low-mass star disk?
Jayatee Kanwar, Inga Kamp, Peter Woitke +10
JWST is discovering a plethora of species in planet-forming disks around very low-mass stars such as C2H2, C6H6, C4H2, CH3 etc. The column densities of these species retrieved from…
JWST-MIRI Spectroscopy of Warm Molecular Emission and Variability in the AS 209 Disk
Carlos E. Romero-Mirza, Karin I. Öberg, Andrea Banzatti +24
We present MIRI MRS observations of the large, multi-gapped protoplanetary disk around the T-Tauri star AS 209. The observations reveal hundreds of water vapor lines from 4.9 to 25…
Water-Rich Disks around Late M-stars Unveiled: Exploring the Remarkable Case of Sz114
Chengyan Xie, Ilaria Pascucci, Feng Long +18
We present an analysis of the JDISC JWST/MIRI-MRS spectrum of Sz~114, an accreting M5 star surrounded by a large dust disk with a shallow gap at au. The spectrum is molec…
Molecules with ALMA at Planet-forming Scales (MAPS). Complex Kinematics in the AS 209 Disk Induced by a Forming Planet and Disk Winds
Maria Galloway-Sprietsma, Jaehan Bae, Richard Teague +19
We study the kinematics of the AS 209 disk using the J=2-1 transitions of CO, CO, and CO. We derive the radial, azimuthal, and vertical velocity of the gas, ta…
A Large Double-ring Disk around the Taurus M Dwarf J04124068+2438157
Feng Long, Bin B. Ren, Nicole L. Wallack +23
Planet formation imprints signatures on the physical structures of disks. In this paper, we present high-resolution (50 mas, 8 au) Atacama Large Millimeter/submillimeter Arra…
The Radial Profile of Dust Grain Size in the Protoplanetary Disk of DS Tau
Dafa Li, Yao Liu, Hongchi Wang +2
How do dust grains in protoplanetary disks overcome rapid radial drift and grow from micron size particles to planets is not well understood. The key is to search for evidence of d…
On the underestimation of dust mass in protoplanetary disks: Effects of disk structure and dust properties
Yao Liu, Hendrik Linz, Min Fang +6
The total amount of dust grains in protoplanetary disks is one of the key properties that characterize the potential for planet formation. With (sub-)millimeter flux measurements,…
Millimeter Gap Contrast as a Probe for Turbulence Level in Protoplanetary Disks
Yao Liu, Gesa H. -M. Bertrang, Mario Flock +7
Turbulent motions are believed to regulate angular momentum transport and influence dust evolution in protoplanetary disks. Measuring the strength of turbulence is challenging thro…
Molecules with ALMA at Planet-forming Scales (MAPS). A Circumplanetary Disk Candidate in Molecular Line Emission in the AS 209 Disk
Jaehan Bae, Richard Teague, Sean M. Andrews +29
We report the discovery of a circumplanetary disk (CPD) candidate embedded in the circumstellar disk of the T Tauri star AS 209 at a radial distance of about 200 au (on-sky separat…
Modeling the arc and ring structures in the HD 143006 disk
Yao Liu, Mario Flock, Min Fang
Rings and asymmetries in protoplanetary disks are considered as signposts of ongoing planet formation. In this work, we conduct three-dimensional radiative transfer simulations to…
Molecules with ALMA at Planet-forming Scales (MAPS) V: CO gas distributions
Ke Zhang, Alice S. Booth, Charles J. Law +32
Here we present high resolution (15-24 au) observations of CO isotopologue lines from the Molecules with ALMA on Planet-forming Scales (MAPS) ALMA Large Program. Our analysis emplo…
Molecules with ALMA at Planet-forming Scales (MAPS) XIV: Revealing disk substructures in multi-wavelength continuum emission
Anibal Sierra, Laura M. Pérez, Ke Zhang +25
Constraining dust properties of planet-forming disks via high angular resolution observations is fundamental to understanding how solids are trapped in substructures and how dust g…
Molecules with ALMA at Planet-forming Scales (MAPS) VIII: CO Gap in AS 209--Gas Depletion or Chemical Processing?
Felipe Alarcón, Arthur Bosman, Edwin Bergin +22
Emission substructures in gas and dust are common in protoplanetary disks. Such substructures can be linked to planet formation or planets themselves. We explore the observed gas s…
Molecules with ALMA at Planet-forming Scales (MAPS) I: Program Overview and Highlights
Karin I. Oberg, Viviana V. Guzman, Catherine Walsh +35
Planets form and obtain their compositions in dust and gas-rich disks around young stars, and the outcome of this process is intimately linked to the disk chemical properties. The…
Molecules with ALMA at Planet-forming Scales (MAPS). XV. Tracing protoplanetary disk structure within 20 au
Arthur D. Bosman, Edwin A. Bergin, Ryan A. Loomis +25
Constraining the distribution of gas and dust in the inner 20 au of protoplanetary disks is difficult. At the same time, this region is thought to be responsible for most planet fo…
Molecules with ALMA at Planet-forming Scales (MAPS). VII. Sub-stellar O/H and C/H and super-stellar C/O in planet feeding gas
Arthur D. Bosman, Felipe Alarcón, Edwin A. Bergin +28
The elemental composition of the gas and dust in a protoplanetary disk influences the compositions of the planets that form in it. We use the Molecules with ALMA at Planet-forming…
Molecules with ALMA at Planet-forming Scales (MAPS) VI: Distribution of the small organics HCN, C2H, and H2CO
Viviana V. Guzmán, Jennifer B. Bergner, Charles J. Law +22
Small organic molecules, such as C2H, HCN, and H2CO, are tracers of the C, N, and O budget in protoplanetary disks. We present high angular resolution (10-50 au) observations of C2…
Molecules with ALMA at Planet-forming Scales. XX. The Massive Disk Around GM Aurigae
Kamber R. Schwarz, Jenny K. Calahan, Ke Zhang +25
Gas mass remains one of the most difficult protoplanetary disk properties to constrain. With much of the protoplanetary disk too cold for the main gas constituent, H2, to emit, alt…
Molecules with ALMA at Planet-forming Scales (MAPS) III: Characteristics of Radial Chemical Substructures
Charles J. Law, Ryan A. Loomis, Richard Teague +32
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…
Dual-Wavelength ALMA Observations of Dust Rings in Protoplanetary Disks
Feng Long, Paola Pinilla, Gregory J. Herczeg +13
We present new Atacama Large Millimeter/submillimeter Array (ALMA) observations for three protoplanetary disks in Taurus at 2.9\,mm and comparisons with previous 1.3\,mm data both…
The Radial Distribution of Dust Particles in the HL Tau Disk from ALMA and VLA Observations
Carlos Carrasco-González, Anibal Sierra, Mario Flock +13
Understanding planet formation requires to discern how dust grows in protoplanetary disks. An important parameter to measure in disks is the maximum dust grain size present. This i…
CLIcK: a Continuum and Line fItting Kit for circumstellar disks
Yao Liu, Ilaria Pascucci, Thomas Henning
Infrared spectroscopy with medium to high spectral resolution is essential to characterize the gas content of circumstellar disks. Unfortunately, conducting continuum and line radi…