The Circumstellar Disk HD 169142: Gas, Dust, and Planets Acting in Concert? [PDF]
, 2017 HD 169142 is an excellent target for investigating signs of planet–disk interaction due to previous evidence of gap structures. We perform J-band (∼1.2 μm) polarized intensity imaging of HD 169142 with VLT/SPHERE.
A. Pohl +36 more
semanticscholar +1 more source
The Circumstellar Gas of Phi Leonis in the UV [PDF]
The Astronomical Journal, 2021 Abstract HST UV spectra were obtained to study whether the φ Leo system has one or more stellar companions, as shown for the A-star dwarf, HR10, stellar pulsation, or transiting exocomets. During five partial HST observation sets spread over 13 months, redshifted gas with radial velocities up to +245 km s−1 was observed on one occasion,
C. A. Grady +4 more
openaire +1 more source
Dust Coagulation in Oxygen-rich Circumstellar Outflows
The Astrophysical Journal, 2023 We show that the inefficient growth of SiO molecules on (SiO) _x dust grains prolongs the period of maximum dust nucleation in circumstellar outflows resulting in a several orders-of-magnitude increase in the dust density near the star.
John A. Paquette +2 more
doaj +1 more source
Circumstellar gas and dust shells of M giants and supergiants.
Astrophysical Journal, Supplement Series, 1978 W. Hagen
semanticscholar +3 more sources
Analysis of Methods for Computing the Trajectories of Dust Particles in a Gas–Dust Circumstellar Disk [PDF]
, 2017 A systematic analysis ofmethods for computing the trajectories of solid-phase particles applied in modern astrophysics codes designed for modeling gas–dust circumstellar disks has been carried out for the first time.
O. Stoyanovskaya +2 more
semanticscholar +1 more source
Millimetre Observations of Maser-Emitting Planetary Nebulae
Galaxies, 2022 Observations in the millimetre bands of maser-emitting planetary nebulae (PNe) are crucial to study their circumstellar molecular gas at the beginning of the PN phase.
Lucero Uscanga +9 more
doaj +1 more source
DETECTION OF WEAK CIRCUMSTELLAR GAS AROUND THE DAZ WHITE DWARF WD 1124-293: EVIDENCE FOR THE ACCRETION OF MULTIPLE ASTEROIDS [PDF]
, 2012 Single metal-polluted white dwarfs with no dusty disks are believed to be actively accreting metals from a circumstellar disk of gas caused by the destruction of asteroids perturbed by planetary systems.
J. Debes +8 more
semanticscholar +1 more source
The Line Emission from the Circumstellar Gas around SN 1987A [PDF]
The Astrophysical Journal, 1996 The narrow emission lines from the inner ring around SN 1987A during the first $\sim 2000$ days are modeled. The analysis extends that in Lundqvist & Fransson (1991) to include an improved description for the geometry, a multi-density structure of the emitting gas, results from improved calculations for the evolu- tion of the EUV radiation from the
Lundqvist, P., Fransson, C.
openaire +2 more sources
Numerical modeling of gravitational instability outcomes in multiphase circumstellar discs
EPJ Web of Conferences, 2013 To suggest consistent route toward planetesimal and planetary core formation in circumstellar discs we study gravitational instability outcomes in massive multiphase (gas-collisionless bodies) disc.
Snytnikov Valeriy N. +1 more
doaj +1 more source
SPECTROSCOPIC MONITORING OF THE B[E] OBJECTS FSCMA AND MOCAM
Odessa Astronomical Publications, 2019 Objects with the B[e] phenomenon exhibit permitted and forbidden emission lines due to the presence of circumstellar ionized gas and large infrared excesses due to processing of the stellar radiation by circumstellar dust.
A. K. Kuratova +10 more
doaj +1 more source