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With two directly detected protoplanets, the PDS 70 system is a unique source in which to study the complex interplay between forming planets and their natal environment. The large dust cavity carved by the two giant planets can affect the…

Earth and Planetary Astrophysics · Physics 2024-09-04 L. Rampinelli , S. Facchini , M. Leemker , J. Bae , M. Benisty , R. Teague , C. J. Law , K. I. Öberg , B. Portilla-Revelo , A. J. Cridland

We present the results of a systematic observational campaign designed to search for microvariability in the optical polarization of BL Lac objects. We have observed a sample formed by 8 X-ray-selected and 10 radio-selected sources, looking…

Astrophysics · Physics 2009-11-11 I. Andruchow , G. E. Romero , S. A. Cellone

The magnetic structure in the Galactic disk, the Galactic center and the Galactic halo can be delineated more clearly than ever before. In the Galactic disk, the magnetic structure has been revealed by starlight polarization within 2 or 3…

Astrophysics of Galaxies · Physics 2009-11-13 J. L. Han

We have carried out continuum and line polarisation observations of two Proto-planetary nebulae (PPNe), CRL 618 and OH 231.8+4.2, using the Submillimeter Array (SMA) in its compact configuration. The frequency range of observations, 330-345…

Solar and Stellar Astrophysics · Physics 2015-06-18 L. Sabin , Q. Zhang , A. A. Zijlstra , N. A. Patel , R. Vázquez , B. A. Zauderer , M. E. Contreras , P. F. Guillén

The complete three-dimensional structure of the magnetic field within molecular clouds has eluded determination despite its high value in determining controlling factors in the star formation process, as it cannot be directly probed…

Astrophysics of Galaxies · Physics 2019-03-13 Che-Yu Chen , Patrick K. King , Zhi-Yun Li , Laura M. Fissel , Renato R. Mazzei

We describe the first complete polarimetric dataset of the entire outburst of a low-mass black hole X-ray binary system and discuss the constraints for geometry and radiative mechanisms it imposes. During the decaying hard state, when the…

We present ALMA images of the sub-mm continuum polarisation and spectral index of the protoplanetary ringed disk HD163296. The polarisation fraction at 870{\mu}m is measured to be ~0.9% in the central core and generally increases with…

Earth and Planetary Astrophysics · Physics 2018-10-10 W. R. F. Dent , C. Pinte , P. C. Cortes , F. Ménard , A. Hales , E. Fomalont , I. de Gregorio-Monsalvo

Polarized dust emission is a key tracer in the study of interstellar medium and of star formation. The observed polarization, however, is a product of magnetic field structure, dust grain properties and grain alignment efficiency, as well…

The polarized dust emission observed in Class 0 protostellar cores at high angular resolution with ALMA has raised several concerns about the grain alignment conditions in these regions. We aim to study the role of the radiation field on…

Magnetic fields are expected to play an important role in accretion processes for circumstellar disks. Measuring the magnetic field morphology is difficult, especially since polarimetric (sub)millimeter continuum observations may not trace…

Solar and Stellar Astrophysics · Physics 2020-09-30 Ian W. Stephens , Manuel Fernandez-Lopez , Zhi-Yun Li , Leslie W. Looney , Richard Teague

Young stellar objects (YSOs) are surrounded by protoplanetary disks, which are the birthplace of young planets. Ring and gap structures are observed among evolved protoplanetary disks, often interpreted as a consequence of planet formation.…

Planck results have revealed that the electric dipole emission from polycyclic aromatic hydrocarbons (PAHs) is the most reliable explanation for anomalous microwave emission that interferes with cosmic microwave background (CMB) radiation…

Astrophysics of Galaxies · Physics 2015-06-15 Thiem Hoang , A. Lazarian , P. G. Martin

Polarization of interstellar dust emission is a powerful probe of dust properties and magnetic field structure. Yet studies of external galaxies are hampered by foreground dust contribution. The aim of this study is to separate the…

Astrophysics of Galaxies · Physics 2022-11-30 D. Alina , J. -Ph. Bernard , K. H. Yuen , A. Lazarian , A. Hughes , M. Iskakova , A. Akimkhan , A. Mukanova

Magnetic fields and turbulence may play a key role in the evolution of protoclusters, influencing the formation of dense cores and stars. Here, we examine the morphology of the magnetic fields in the G327.29 protocluster using both the…

The dynamical interactions between young binaries can perturb the material distribution of their circumstellar disks, and modify the planet formation process. In order to constrain the impact and nature of the binary interaction in the RW…

Earth and Planetary Astrophysics · Physics 2024-07-29 N. T. Kurtovic , S. Facchini , M. Benisty , P. Pinilla , S. Cabrit , E. L. N. Jensen , C. Dougados , R. Booth , C. N. Kimmig , C. F. Manara , J. E. Rodriguez

The bending of radio galaxies in galaxy clusters is expected to be caused by interactions with the local environment. The physical processes responsible for jet bending, and their influence on the polarization properties of radio galaxies,…

Astrophysics of Galaxies · Physics 2026-01-16 S. Vanderwoude , E. Osinga , B. M. Gaensler , J. L. West , R. J. van Weeren

Fast Radio Bursts (FRBs) are short-timescale transients of extragalactic origin. The number of detected FRBs has grown dramatically since their serendipitous discovery from archival data. Some FRBs have also been seen to repeat. The…

High Energy Astrophysical Phenomena · Physics 2024-05-21 Pavan Uttarkar , Ryan M. Shannon , Marcus E. Lower , Pravir Kumar , Danny C. Price , A. T. Deller , K. Gourdji

Atacama Large Millimeter/Submillimeter Array (ALMA) has revolutionized the field of dust polarization in protoplanetary disks across multiple wavelengths. Previous observations and empirical modeling suggested multiple mechanisms of dust…

Solar and Stellar Astrophysics · Physics 2024-07-30 Nguyen Tat Thang , Pham Ngoc Diep , Thiem Hoang , Le Ngoc Tram , Nguyen Bich Ngoc , Nguyen Thi Phuong , Bao Truong

Galactic dust emission is polarized at unexpectedly high levels, as revealed by Planck. The origin of the observed $\simeq 20\%$ polarization fractions can be identified by characterizing the properties of optical starlight polarization in…

Astrophysics of Galaxies · Physics 2019-04-17 G. V. Panopoulou , B. S. Hensley , R. Skalidis , D. Blinov , K. Tassis
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