Results 1 to 10 of about 14,509 (263)

A Primordial Origin for the Gas-rich Debris Disks around Intermediate-mass Stars [PDF]

open access: greenThe Astrophysical Journal Letters, 2023
While most debris disks consist of dust with little or no gas, a fraction have significant amounts of gas detected via emission lines of CO, ionized carbon, and/or atomic oxygen.
Riouhei Nakatani   +6 more
doaj   +2 more sources

The Disks In Scorpius–Centaurus Survey (DISCS). I. Four Newly Resolved Debris Disks in Polarized Intensity Light

open access: goldThe Astronomical Journal
The presence of infrared excesses around stars directly correlates with spatially resolved imaging detections of circumstellar disks at both millimeter and optical/near-infrared wavelengths.
Justin Hom   +10 more
doaj   +2 more sources

Frequencies of Warm Debris Disks Based on Point Source Catalogs of Spitzer, WISE, and Gaia

open access: goldThe Astronomical Journal
More than a thousand warm debris disks have been detected as infrared excess at mid-infrared wavelengths, and their frequencies have been obtained for various spectral types of stars.
Toshiyuki Mizuki   +3 more
doaj   +2 more sources

Formation History of HD 106906 and the Vertical Warping of Debris Disks by an External Inclined Companion

open access: yesThe Astrophysical Journal, 2023
HD 106906 is a planetary system that hosts a wide-orbit companion, as well as an eccentric and flat debris disk, which hold important constraints on its formation and subsequent evolution.
Nathaniel W. H. Moore   +5 more
doaj   +1 more source

The Apparent Absence of Forward Scattering in the HD 53143 Debris Disk

open access: yesThe Astrophysical Journal, 2023
HD 53143 is a mature Sun-like star and host to a broad disk of dusty debris, including a cold outer ring of planetesimals near 90 au. Unlike most other inclined debris disks imaged at visible wavelengths, the cold disk around HD 53143 appears as ...
Christopher C. Stark   +7 more
doaj   +1 more source

Long-term Evolution of Warps in Debris Disks—Application to the Gyr-old System HD 202628

open access: yesThe Astrophysical Journal, 2023
We present the results of N -body simulations meant to reproduce the long-term effects of mutually inclined exoplanets on debris disks, using the HD 202628 system as a proxy.
Madison T. Brady   +3 more
doaj   +1 more source

Formation of Gaps in Self-gravitating Debris Disks by Secular Resonance in a Single-planet System. II. Toward a Self-consistent Model

open access: yesThe Astrophysical Journal, 2023
High-resolution observations of several debris disks reveal structures such as gaps and spirals, suggestive of gravitational perturbations induced by underlying planets.
Antranik A. Sefilian   +2 more
doaj   +1 more source

Giant Impacts and Debris Disk Morphology

open access: yesThe Astrophysical Journal, 2023
Certain debris disks have nonaxisymmetric shapes in scattered light which are unexplained. The appearance of a disk depends on how its constituent Keplerian ellipses are arranged.
Joshua W. Jones   +4 more
doaj   +1 more source

Tribological behavior of heat treated AISI 6150 steel

open access: yesJournal of Materials Research and Technology, 2020
This research presents an experimental study on the tribological behavior and plastic deformation layer response of quenched-tempered AISI 6150 steel and austempered AISI 6150 steel under sliding with a ball-on-disk type apparatus.
Xue Han   +7 more
doaj   +1 more source

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