Observations of protoplanetary disk structures

SM Andrews - Annual Review of Astronomy and Astrophysics, 2020 - annualreviews.org
The disks that orbit young stars are the essential conduits and reservoirs of material for star
and planet formation. Their structures, meaning the spatial variations of the disk physical …

The origin and evolution of multiple star systems

SSR Offner, M Moe, KM Kratter, SI Sadavoy… - arXiv preprint arXiv …, 2022 - arxiv.org
Observational advances over the last decade have enabled high-resolution, interferometric
studies of forming multiple systems, statistical surveys of multiplicity in star-forming regions …

PRODIGE–envelope to disk with NOEMA-I. A 3000 au streamer feeding a Class I protostar

MT Valdivia-Mena, JE Pineda, DM Segura-Cox… - Astronomy & …, 2022 - aanda.org
Context. In the past few years, there has been a rise in the detection of streamers,
asymmetric flows of material directed toward the protostellar disk with material from outside …

Orbital evolution of equal-mass eccentric binaries due to a gas disk: Eccentric inspirals and circular outspirals

DJ D'Orazio, PC Duffell - The Astrophysical Journal Letters, 2021 - iopscience.iop.org
We solve the equations of two-dimensional hydrodynamics describing a circumbinary disk
accreting onto an eccentric, equal-mass binary. We compute the time rate of change of the …

Equilibrium eccentricity of accreting binaries

J Zrake, C Tiede, A MacFadyen… - The Astrophysical …, 2021 - iopscience.iop.org
Using high-resolution hydrodynamics simulations, we show that equal-mass binaries
accreting from a circumbinary disk evolve toward an orbital eccentricity of e≃ 0.45, unless …

Accretion geometry of the neutron star low mass X-ray binary Cyg X-2 from X-ray polarization measurements

R Farinelli, S Fabiani, J Poutanen… - Monthly Notices of …, 2023 - academic.oup.com
We report spectro-polarimetric results of an observational campaign of the bright neutron
star low-mass X-ray binary Cyg X-2 simultaneously observed by IXPE, NICER, and …

Flow of gas detected from beyond the filaments to protostellar scales in Barnard 5

MT Valdivia-Mena, JE Pineda, DM Segura-Cox… - Astronomy & …, 2023 - aanda.org
Context. The infall of gas from outside natal cores has proven to feed protostars after the
main accretion phase (Class 0). This changes our view of star formation to a picture that …

The Mass Accretion Rate and Stellar Properties in Class I Protostars

E Fiorellino, Ł Tychoniec, FCS de Miera… - The Astrophysical …, 2023 - iopscience.iop.org
Stars collect most of their mass during the protostellar stage, yet the accretion luminosity and
stellar parameters, which are needed to compute the mass accretion rate, are poorly …

Eccentric binaries in retrograde discs

C Tiede, DJ D'Orazio - Monthly Notices of the Royal …, 2024 - academic.oup.com
Modern numerical hydrodynamics tools have recently enabled detailed examinations of
binaries accreting from prograde circumbinary discs. These have reframed the current …

The VLA/ALMA nascent disk and multiplicity (VANDAM) survey of Orion protostars. V. A characterization of protostellar multiplicity

JJ Tobin, SSR Offner, KM Kratter… - The Astrophysical …, 2022 - iopscience.iop.org
We characterize protostellar multiplicity in the Orion molecular clouds using Atacama Large
Millimeter/submillimeter Array 0.87 mm and Very Large Array 9 mm continuum surveys …