Results 71 to 80 of about 13,210 (208)

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

CMR Exploration. II. Filament Identification with Machine Learning

The Astrophysical Journal, 2023
We adopt magnetohydrodynamic simulations that model the formation of filamentary molecular clouds via the collision-induced magnetic reconnection (CMR) mechanism under varying physical conditions.
Duo Xu, Shuo Kong, Avichal Kaul, Héctor G. Arce, Volker Ossenkopf-Okada   +4 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

Photometric and Spectroscopic Observations of a Diffuse Interstellar Filament in the Foreground of the Magellanic Clouds [PDF]

The Astrophysical Journal, 1998
We report the results of a photometric and spectroscopic study of stars that appear toward an infrared bright filament in the region between the LMC and SMC in the constellation Mensa. The filament was chosen for study because of its large angular size, intense IR emission, and proximity to an X-ray source observed using ROSAT.
Bryan E. Penprase, Jennifer Lauer, Joel Aufrecht, Barry Y. Welsh   +3 more
openaire   +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

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). 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

Accelerated expansion of the Crab Nebula and evaluation of its neutron-star parameters [PDF]

, 2003
A model of an accelerated expansion of the Crab Nebula powered by the spinning-down Crab pulsar is proposed, in which time dependence of the acceleration is connected with evolution of pulsar luminosity.
Bejger, M., Haensel, P.
core   +2 more sources

Possible link between the power spectrum of interstellar filaments and the origin of the prestellar core mass function [PDF]

Astronomy & Astrophysics, 2015
Two major features of the prestellar CMF are: 1) a broad peak below 1 Msun, presumably corresponding to a mean gravitational fragmentation scale, and 2) a characteristic power-law slope, very similar to the Salpeter slope of the stellar initial mass function (IMF) at the high-mass end.
Roy, A., André, Ph., Arzoumanian, D., Peretto, N., Palmeirim, P., Könyves, V., Schneider, N., Benedettini, M., Di Francesco, J., Elia, D., Hill, T., Ladjelate, B., Louvet, F., Motte, F., Pezzuto, S., Schisano, E., Shimajiri, Y., Spinoglio, L., Ward-Thompson, D., White, G.   +19 more
openaire   +9 more sources

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