Results 1 to 10 of about 884 (199)

Structure and Kinematics of Sh2-138—A Distant Hub-filament System in the Outer Galactic Plane

The Astrophysical Journal, 2023
We present a molecular line study of the Sh2-138 (IRAS 22308+5812) hub-filament system with the aim of investigating its structure and kinematics. Archival CO molecular line data from the Canadian Galactic Plane Survey (CO( J = 1–0)) for the wider region
Kshitiz K. Mallick, Lokesh K. Dewangan, Devendra K. Ojha, Tapas Baug, Igor I. Zinchenko   +4 more
doaj   +1 more source

Advances on the Links Between Turbulent and Submeso‐ to Mesoscales During EUREC4A

Earth and Space Science, Volume 12, Issue 2, February 2025.
Abstract Turbulent processes in the atmospheric boundary layer (ABL) are parameterized in numerical weather prediction and climate models. Better understanding their modulation by larger‐scale organized structures, some of them being represented explicitly, is thus of great interest.
E. Gauvrit, M.‐N. Bouin, J.‐M. Delouis, F. Boulanger   +3 more
wiley   +1 more source

B-fields and Dust in Interstellar Filaments Using Dust Polarization (BALLAD-POL). IV. Grain Alignment Mechanisms in the Cocoon Nebula (IC 5146) Using Polarization Observations from JCMT/POL-2

The Astrophysical Journal
The polarization of starlight and thermal dust emission from aligned nonspherical grains provides a powerful tool for tracing magnetic field morphologies and strengths in the diffuse interstellar medium to star-forming regions, and constraining the ...
Saikhom Pravash, Thiem Hoang, Archana Soam, Eun Jung Chung, Diep Ngoc Pham, Nguyen Bich Ngoc, Le Ngoc Tram   +6 more
doaj   +1 more source

Das zirkumgalaktische Medium

Physik in unserer Zeit, Volume 56, Issue 1, Page 30-37, January 2025.
Galaxien wie die Milchstraße sind umhüllt von einem gigantischen Kokon aus diffusem Gas. Aktuelle Forschungsergebnisse belegen, dass dieses zirkumgalakische Medium eine entscheidende Rolle für die Entstehung und Entwicklung von Galaxien spielt. Zusammenfassung Als zirkumgalaktisches Medium bezeichnet man die gasförmigen Hüllen von Galaxien, die sich ...
Philipp Richter
wiley   +1 more source

Magnetically Aligned Striations in the L914 Filamentary Cloud

The Astronomical Journal
We present CO( J = 1–0) multiline observations toward the L914 dark cloud in the vicinity of the Cygnus X region, using the 13.7 m millimeter telescope of the Purple Mountain Observatory.
Li Sun, Xuepeng Chen, Min Fang, Shaobo Zhang, Yan Gong, Jiancheng Feng, Xuefu Li, Qing-Zeng Yan, Ji Yang   +8 more
doaj   +1 more source

Micro‐ and nanoscale studies of insoluble organic matter and C‐rich presolar grains in Murchison and Sutter's Mill in preparation for Bennu sample analysis

Meteoritics &Planetary Science, Volume 59, Issue 10, Page 2831-2850, October 2024.
Abstract Samples of B‐type asteroid (101955) Bennu returned by the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS‐REx) spacecraft will provide unique insight into the nature of carbonaceous asteroidal matter without the atmospheric entry heating or terrestrial weathering effects associated with ...
A. N. Nguyen, S. J. Clemett, K. Thomas‐Keprta, C. M. O'D. Alexander, D. P. Glavin, J. P. Dworkin, H. C. Connolly Jr, D. S. Lauretta   +7 more
wiley   +1 more source

B-fields and Dust in Interstellar Filaments Using Dust Polarization (BALLAD-POL). III. Grain Alignment and Disruption Mechanisms in G34.43+0.24 Using Polarization Observations from JCMT/POL-2

The Astrophysical Journal
Polarization of starlight and thermal dust emission due to aligned non-spherical grains helps us to trace magnetic field ( B -field) morphology in molecular clouds and to study grain alignment mechanisms.
Saikhom Pravash, Archana Soam, Pham Ngoc Diep, Thiem Hoang, Nguyen Bich Ngoc, Le Ngoc Tram   +5 more
doaj   +1 more source

B-fields and Dust in Interstellar Filaments Using Dust Polarization (BALLAD-POL). VI. Grain Alignment Mechanisms in the Massive Quiescent Filament G16.96+0.27 Using Dust Polarization Observations from JCMT/POL-2

The Astrophysical Journal Supplement Series
Dust polarization induced by aligned nonspherical grains acts as an important tool to trace the magnetic field ( B -field) morphologies and strengths in molecular clouds and constrain grain properties and their alignment mechanisms.
Saikhom Pravash, Thiem Hoang, Archana Soam, Qi-Lao Gu, Tie Liu, Pham Ngoc Diep, Le Ngoc Tram, Nguyen Bich Ngoc   +7 more
doaj   +1 more source

Limitations of the modified blackbody fit method for determining molecular cloud properties

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During the earliest stages, that is, concerning physical processes in molecular clouds and filaments, the column ...
Niko Zielinski, Sebastian Wolf
wiley   +1 more source

Fordern galaktische Zwerge die Kosmologie heraus?

Physik in unserer Zeit, Volume 55, Issue 3, Page 128-135, May 2024.
Dem Standardmodell der Kosmologie zufolge sollten sich Satellitengalaxien nahezu zufällig um ihre Hauptgalaxie verteilen und bewegen. Beobachtete Systeme um die Milchstraße und andere nahe Galaxien sind deutlich geordneter. Ist dies ein Problem für das Modell oder sogar für unser Verständnis der Dunklen Materie?
Marcel S. Pawlowski
wiley   +1 more source