Featured
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Article
| Open Access
A probable Keplerian disk feeding an optically revealed massive young star
The authors suggest that a probable Keplerian disk is feeding an optically revealed massive young stellar object in the Large Magellanic Cloud.
- Anna F. McLeod
- , Pamela D. Klaassen
- & Adam Ginsburg
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Aligned grains and scattered light found in gaps of planet-forming disk
Deep, high-resolution polarization observations of HL Tau at 870 µm show gaps that have polarization angles with a notable azimuthal component and a higher polarization fraction than the rings.
- Ian W. Stephens
- , Zhe-Yu Daniel Lin
- & Ryo Tazaki
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Subsecond periodic radio oscillations in a microquasar
Two instances of approximately 5-Hz transient periodic oscillation features from the source detected in the 1.05- to 1.45-GHz radio band that occurred in January 2021 and June 2022 are reported.
- Pengfu Tian
- , Ping Zhang
- & Na Sai
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Article
| Open Access
Water in the terrestrial planet-forming zone of the PDS 70 disk
Observations with the sensitive mid-infrared spectrometer MIRI on board JWST reveal the presence of a water vapour reservoir in the terrestrial plant-forming zone of the young planetary system PDS 70.
- G. Perotti
- , V. Christiaens
- & G. Wright
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Perspective |
Black holes up close
The current observations and understanding of black holes is reviewed, and the future of the field of black-hole astrophysics is discussed.
- Ramesh Narayan
- & Eliot Quataert
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Article |
Deuterium-enriched water ties planet-forming disks to comets and protostars
Direct detection of gas phase water from the disk of V883 Ori indicates that disks directly inherit water from the star-forming cloud that becomes incorporated into large icy bodies without notable chemical alteration.
- John J. Tobin
- , Merel L. R. van ’t Hoff
- & Lucas Cieza
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A dense ring of the trans-Neptunian object Quaoar outside its Roche limit
The authors report observations of a dense and inhomogeneous ring at a surprisingly large distance from the trans-Neptunian body Quaoar.
- B. E. Morgado
- , B. Sicardy
- & J. de Wit
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Binarity of a protostar affects the evolution of the disk and planets
Binarity and multiplicity in general strongly affect the properties of emerging stars, as well as the physical and chemical structures of protoplanetary disks and therefore potentially any emerging planetary systems.
- Jes K. Jørgensen
- , Rajika L. Kuruwita
- & Edwin A. Bergin
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Localized thermonuclear bursts from accreting magnetic white dwarfs
The identification and characterization of rapid bursts in three accreting white dwarfs have shown that magnetically confined thermonuclear runaways resembling type-I X-ray bursts may occur in the surface layers of white dwarf atmospheres.
- S. Scaringi
- , P. J. Groot
- & F. X. Timmes
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Article |
A persistent ultraviolet outflow from an accreting neutron star binary transient
A persistent, blue-shifted absorption feature is reported in time-resolved UV spectroscopy of the neutron star binary Swift J1858.6-0814, revealing a warm, moderately ionized component in the accretion disk that is wind driven from this system.
- N. Castro Segura
- , C. Knigge
- & P. Wiseman
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A white dwarf accreting planetary material determined from X-ray observations
An X-ray source is detected at the expected position of the white dwarf star G29–38, which enables the calculation of the accretion rate of planetary material without using stellar atmosphere models.
- Tim Cunningham
- , Peter J. Wheatley
- & Dimitri Veras
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Article
| Open Access
Measuring the density structure of an accretion hot spot
An observed one-day difference between the peaks of emission of ultraviolet and optical light from the hot spot on GM Aurigae indicates that the hot spot has a radial density gradient.
- C. C. Espaillat
- , C. E. Robinson
- & J. Muzerolle
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Article |
A measure of the size of the magnetospheric accretion region in TW Hydrae
The size of the inner disk of the T Tauri star TW Hydrae is determined using optical long-baseline interferometric observations, indicating that hydrogen emission comes from a region approximately 3.5 stellar radii across.
- R. Garcia Lopez
- , A. Natta
- & G. Zins
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A cold, massive, rotating disk galaxy 1.5 billion years after the Big Bang
A massive rotating disk galaxy was formed a mere 1.5 billion years after the Big Bang, a surprisingly short time after the origin of the Universe.
- Marcel Neeleman
- , J. Xavier Prochaska
- & Marc Rafelski
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Letter |
Meridional flows in the disk around a young star
Three-dimensional gas velocities in the gapped disk around the young star HD 163296 show meridional flows from the surface of the disk towards its midplane at gap locations.
- Richard Teague
- , Jaehan Bae
- & Edwin A. Bergin
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Letter |
Nine-hour X-ray quasi-periodic eruptions from a low-mass black hole galactic nucleus
Galaxy GSN 069 has unprecedented eruptions of X-ray light every nine hours, which indicate fast transitions between cold and warm states and may shed light on black hole accretion.
- G. Miniutti
- , R. D. Saxton
- & B. Agís-González
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Letter |
A cool accretion disk around the Galactic Centre black hole
Emission from the 1.3-millimetre hydrogen recombination line reveals a rotating disk of cool gas 0.004 parsecs in radius around the supermassive black hole at the centre of our Galaxy.
- Elena M. Murchikova
- , E. Sterl Phinney
- & Roger D. Blandford
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Letter |
A warped disk around an infant protostar
Observations at millimetre wavelengths reveal a young protostar surrounded by a disk with two differently tilted regions.
- Nami Sakai
- , Tomoyuki Hanawa
- & Satoshi Yamamoto
Thermonuclear explosions on neutron stars reveal the speed of their jets