Results 1 to 10 of about 3,519 (205)

Nitrogen deficiency in maize: Annotated image classification dataset [PDF]

Data in Brief, 2023
Nitrogen (N) is one of the key inputs in maize production applied in the form of fertilizers. Nitrogen deficiency during the vegetation period leads to lower yields since N is utilized in proteins and enzymes that enable important biochemical processes ...
Miroslav Salaić, Filip Novoselnik, Ivana Podnar Žarko, Vlatko Galić   +3 more
doaj   +2 more sources

Synthetic car dataset for vehicle detection: Integrating aerial and satellite imagery [PDF]

Data in Brief
Vehicle detection is a very important aspect of computer vision application to aerial and satellite imagery, facilitating activities such as instance counting, velocity estimation, traffic predictions, etc.
Mihaela Orić, Vlatko Galić, Filip Novoselnik   +2 more
doaj   +2 more sources

A magnetized protostellar jet launched from the innermost disk at the truncation radius [PDF]

Scientific Reports
Protostellar jets form when part of the accreting material is energetically ejected from the vicinity of protostars. Understanding where and how they are launched and collimated is crucial to determining their role in the accretion process.
Chin-Fei Lee, Kai-Syun Jhan, Anthony Moraghan   +2 more
doaj   +2 more sources

On the forms of accretion of interstellar gas and dust during the formation of single stars and their planetary systems

Open Astronomy, 2021
In this paper, the mechanisms of star formation and the formation of the equatorial gas and dust disk of protostars are considered. The viscous dynamics of the interstellar matter of gas and dust disks is mainly determined by perturbations of the matter ...
Abdulmyanov Tagir
doaj   +1 more source

Can Protostellar Outflows Set Stellar Masses?

The Astrophysical Journal, 2023
The opening angles of some protostellar outflows appear too narrow to match the expected core–star mass efficiency (SFE) = 0.3–0.5, if the outflow cavity volume traces outflow mass, with a conical shape and a maximum opening angle near 90°.
Philip C. Myers, Michael M. Dunham, Ian W. Stephens   +2 more
doaj   +1 more source

Early Planet Formation in Embedded Disks (eDisk). VII. Keplerian Disk, Disk Substructure, and Accretion Streamers in the Class 0 Protostar IRAS 16544–1604 in CB 68

The Astrophysical Journal, 2023
We present observations of the Class 0 protostar IRAS 16544–1604 in CB 68 from the “Early Planet Formation in Embedded Disks (eDisk)” ALMA Large program. The ALMA observations target continuum and lines at 1.3 mm with an angular resolution of ∼5 au.
Miyu Kido, Shigehisa Takakuwa, Kazuya Saigo, Nagayoshi Ohashi, John J. Tobin, Jes K. Jørgensen, Yuri Aikawa, Yusuke Aso, Frankie J. Encalada, Christian Flores, Sacha Gavino, Itziar de Gregorio-Monsalvo, Ilseung Han, Shingo Hirano, Patrick M. Koch, Woojin Kwon, Shih-Ping Lai, Chang Won Lee, Jeong-Eun Lee, Zhi-Yun Li, Zhe-Yu Daniel Lin, Leslie W. Looney, Shoji Mori, Suchitra Narayanan, Adele L. Plunkett, Nguyen Thi Phuong, Jinshi Sai (Insa Choi), Alejandro Santamaría-Miranda, Rajeeb Sharma, Patrick D. Sheehan, Travis J. Thieme, Kengo Tomida, Merel L. R. van ’t Hoff, Jonathan P. Williams, Yoshihide Yamato, Hsi-Wei Yen   +35 more
doaj   +1 more source

3D Radiation-hydrodynamic Simulations Resolving Interior of Rapidly Accreting Primordial Protostar

The Astrophysical Journal, 2023
Direct collapse of supermassive stars is a possible pathway to form supermassive black hole seeds at high redshifts. Whereas previous three-dimensional (3D) simulations demonstrate that supermassive stars form via rapid mass accretion, those resolving ...
Kazutaka Kimura, Takashi Hosokawa, Kazuyuki Sugimura, Hajime Fukushima   +3 more
doaj   +1 more source

An ALMA-resolved View of 7000 au Protostellar Gas Ring around the Class I Source CrA-IRS 2 as a Possible Sign of Magnetic Flux Advection

The Astrophysical Journal Letters, 2023
Transferring a significant fraction of the magnetic flux from a dense cloud core is essential in the star formation process. A ringlike structure produced by magnetic flux loss has been predicted theoretically, but no observational identification has ...
Kazuki Tokuda, Naofumi Fukaya, Kengo Tachihara, Mitsuki Omura, Naoto Harada, Shingo Nozaki, Ayumu Shoshi, Masahiro N. Machida   +7 more
doaj   +1 more source

Early Planet Formation in Embedded Disks (eDisk). VI. Kinematic Structures around the Very-low-mass Protostar IRAS 16253-2429

The Astrophysical Journal, 2023
Precise estimates of protostellar masses are crucial to characterize the formation of stars of low masses down to brown dwarfs (BDs; M _* < 0.08 M _☉ ).
Yusuke Aso, Woojin Kwon, Nagayoshi Ohashi, Jes K. Jørgensen, John J. Tobin, Yuri Aikawa, Itziar de Gregorio-Monsalvo, Ilseung Han, Miyu Kido, Patrick M. Koch, Shih-Ping Lai, Chang Won Lee, Jeong-Eun Lee, Zhi-Yun Li, Zhe-Yu Daniel Lin, Leslie W. Looney, Suchitra Narayanan, Nguyen Thi Phuong, Jinshi Sai (Insa Choi), Kazuya Saigo, Alejandro Santamaría-Miranda, Rajeeb Sharma, Shigehisa Takakuwa, Travis J. Thieme, Kengo Tomida, Jonathan P. Williams, Hsi-Wei Yen   +26 more
doaj   +1 more source

Hourglass Magnetic Field of a Protostellar System

Universe
An hourglass-shaped magnetic field pattern arises naturally from the gravitational collapse of a star-forming gas cloud. Most studies have focused on the prestellar collapse phase, when the structure has a smooth and monotonic radial profile.
Shantanu Basu, Xiyuan Li, Gianfranco Bino   +2 more
doaj   +1 more source