Results 111 to 120 of about 2,982 (223)

86th Annual Meeting of the Meteoritical Society (2024)

Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source

Exploring the Complex Ionization Environment of the Turbulent DM Tau Disk

The Astrophysical Journal
Ionization drives important chemical and dynamical processes within protoplanetary disks, including the formation of organics and water in the cold midplane and the transportation of material via accretion and magnetohydrodynamic flows.
Deryl E. Long, L. Ilsedore Cleeves, Fred C. Adams, Sean Andrews, Edwin A. Bergin, Viviana V. Guzmán, Jane Huang, A. Meredith Hughes, Chunhua Qi, Kamber Schwarz, Jacob B. Simon, David Wilner   +11 more
doaj   +1 more source

Understanding Balmer Decrements in T Tauri Stars in Terms of Multiflow Magnetospheric Accretion

The Astrophysical Journal
Magnetospheric accretion is the paradigm for accretion in classical T Tauri stars (CTTSs). However, the standard, one-flow magnetospheric accretion model fails to replicate important characteristics such as the observed Balmer decrements. We address this
Naiara Patiño, Nuria Calvet, Gladis Magris, Marbely Micolta, Thanawuth Thanathibodee, Thomas K. Waters, María José Colmenares   +6 more
doaj   +1 more source

The First JWST View of a 30-Myr-old Protoplanetary Disk Reveals a Late-stage Carbon-rich Phase

The Astrophysical Journal Letters
We present a JWST MIRI/MRS spectrum of the inner disk of WISE J044634.16–262756.1B (hereafter J0446B), an old (∼34 Myr) M4.5 star but with hints of ongoing accretion. The spectrum is molecule-rich and dominated by hydrocarbons.
Feng Long, Ilaria Pascucci, Adrien Houge, Andrea Banzatti, Klaus M. Pontoppidan, Joan Najita, Sebastiaan Krijt, Chengyan Xie, Joe Williams, Gregory J. Herczeg, Sean M. Andrews, Edwin Bergin, Geoffrey A. Blake, María José Colmenares, Daniel Harsono, Carlos E. Romero-Mirza, Rixin Li, Cicero X. Lu, Paola Pinilla, David J. Wilner, Miguel Vioque, Ke Zhang, the JDISCS collaboration   +22 more
doaj   +1 more source

Comparison of the Hα circumstellar disks in Be/X-ray binaries and Be stars

, 2001
We present a comparative study of the circumstellar disks in Be/X-ray binaries and isolated Be stars based upon the Hα emission line. From this comparison it follows that the overall structure of the disks in the Be/X-ray binaries is similar to the disks
J. Martí, Reig Torres, Pablo, J. Fabregat, P. Reig, Valchev, T., M. J. Coe, Coe, M.J., N. A. Tomov, Martí, J., R. K. Zamanov, Zamanov, R.K., T. Valchev, Fabregat Llueca, Juan, Tomov, N.A.   +13 more
core   +1 more source

Aligning Planet-hosting Binaries via Dissipative Precession in Circumstellar Disks

The Astrophysical Journal
Recent observations have demonstrated that some subsets of even moderately wide-separation planet-hosting binaries are preferentially configured such that planetary and binary orbits appear to lie within the same plane.
Konstantin Gerbig, Malena Rice, J. J. Zanazzi, Sam Christian, Andrew Vanderburg   +4 more
doaj   +1 more source

Phosphorus-bearing molecules PO and PN at the edge of the Galaxy. [PDF]

Nature, 2023
Koelemay LA, Gold KR, Ziurys LM.
europepmc   +1 more source

Stellar Rotation in the First 6 Myr: Rotational Velocities and Radii Estimates of T Tauri Stars in IC 5070 and IC 348

The Astrophysical Journal
We have acquired high-resolution optical spectroscopy for a sample of T Tauri stars (TTSs) in open clusters using Hydra on the WIYN 3.5 m telescope, and present projected rotational velocities ( v sin i values) for 54 stars in IC 5070 and 99 stars in IC ...
Laurin M. Gray, Katherine L. Rhode, Luisa M. Rebull   +2 more
doaj   +1 more source

A Possible Indication of Metallic Iron in White Dwarf Dusty Disks from Their “Dirtiness”

The Astrophysical Journal
Polluted white dwarfs provide unique constraints on the elemental compositions of planetary bodies. The tidal disruption of accreting bodies is thought to form circumstellar dusty disks, whose emission spectra could offer additional insights into the ...
Ayaka Okuya, Satoshi Okuzumi, Aki Takigawa, Hanako Enomoto   +3 more
doaj   +1 more source

A Multiwavelength ALMA View of Gas and Dust in Binary Protoplanetary System AS 205: Evidence of Dust Asymmetric Distribution

The Astrophysical Journal
We present Atacama Large Millimeter/submillimeter Array observations of multiwavelength dust emissions at 3.1 and 1.3 mm, along with molecular line emissions of CO(2–1), CO(3–2), ^13 CO(3–2), and C ^18 O(3–2) at spatial resolutions of 7–45 au toward the ...
Nguyen Thi Phuong, Nguyen Tat Thang
doaj   +1 more source