Results 91 to 100 of about 586 (186)
The First JWST View of a 30-Myr-old Protoplanetary Disk Reveals a Late-stage Carbon-rich Phase
The Astrophysical Journal LettersWe 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 +22 more
doaj +1 more source
Aligning Planet-hosting Binaries via Dissipative Precession in Circumstellar Disks
The Astrophysical JournalRecent 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 +4 more
doaj +1 more source
A Possible Indication of Metallic Iron in White Dwarf Dusty Disks from Their “Dirtiness”
The Astrophysical JournalPolluted 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 +3 more
doaj +1 more source
The Astrophysical JournalWe 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 +2 more
doaj +1 more source
The Astrophysical JournalWe 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
GANBISS: a new GPU accelerated N-body code for binary star systems. [PDF]
Celest Mech Dyn Astron, 2023 Zimmermann M, Pilat-Lohinger E.
europepmc +1 more source
Imaging Circumstellar Debris Disks
, 1998 4 pages, includes one color PostScript figure, to appear in Proceedings of the Vatican Observatory Symposium on Astrophysics Research and Science ...
openaire +2 more sources
The Astrophysical JournalThe disk mass and substructure in young stellar objects suggest that planet formation may start at the protostellar stage, through the growth of dust grains.
Yusuke Aso +3 more
doaj +1 more source
A Systematic Search for Main-sequence Dipper Stars Using the Zwicky Transient Facility
The Astrophysical JournalMain-sequence dipper stars, characterized by irregular and often aperiodic luminosity dimming events, offer a unique opportunity to explore the variability of circumstellar material and its potential links to planet formation, debris disks, and broadly ...
Anastasios Tzanidakis +10 more
doaj +1 more source
ASASSN-24fw: Candidate Gas-rich Circumsecondary Disk Occultation of a Main-sequence Star
The Astronomical JournalDusty disks around planetary and substellar companions in outer reaches of exoplanetary systems can be detected as long-lasting occultations, provided the observer is close to the secondary’s orbital plane. Here we report optical spectroscopy with KOSMOS
Nadia L. Zakamska +26 more
doaj +1 more source