Results 121 to 130 of about 889,569 (256)

On the Stability of Interstellar Neutral Hydrogen Clouds at Large Z-heights

The Astrophysical Journal
Galactic neutral hydrogen (H i ) data drawn from several large-scale surveys have been used to study 32 small clouds found between Galactic longitudes 70° and 140° and latitudes −20° and −45°.
G. L. Verschuur
doaj   +1 more source

Physical-chemical processes in a protoplanetary cloud [PDF]

Physical-chemical processes in a protoplanetary cloud are discussed. The following subject areas are covered: (1) characteristics of the chemical composition of molecular interstellar clouds; (2) properties and physico-chemical process in the genesis of ...
Lavrukhina, Avgusta K.
core   +1 more source

Methanol in the sky with diamonds [PDF]

The present of gas phase methanol in dense interstellar molecular clouds was established by radio detection of its rotational emission lines. However, the position, width, and profile of a absorption band near 1470 cm(exp -1) in the IR spectra of many ...
Allamandola, L. J., Herbst, T., Sandford, S. A., Tielens, A. G. G. M.   +3 more
core   +1 more source

Identification of Galactic H I Counterpart of the Large [O iii] Emission Structure 1 2 Southeast of M31

The Astronomical Journal
Strottner–Drechsler–Sainty Object 1 (SDSO1) is a faint [O iii ] emission nebula spanning 1 $\mathop{.}\limits^{^\circ }5$ , discovered southeast of M31.
Tiantian Liang, Jie Wang, Tao Wang, Haibo Yuan, Ruoyi Zhang, Zhiyu Zhang, Chao-Wei Tsai, Ping Zhou, Xiaohui Sun, Hu Zou, Yingjie Jing, Chen Xu, Zhipeng Hou, Yann Sainty, Marcel Drechsler, Xavier Strottner, Ziming Liu, Qingze Chen, Zerui Liu   +18 more
doaj   +1 more source

Gas Kinematics and Dynamics of Carina Pillars: A Case Study of G287.76-0.87

The Astrophysical Journal
We study the kinematics of a pillar, namely G287.76-0.87, using three rotational lines of ^12 CO(5-4), ^12 CO(8-7), ^12 CO(11-10), and a fine structure line of [O i ] 63 μ m in southern Carina observed by SOFIA/GREAT.
Ngo-Duy Tung, Le Ngoc Tram, Archana Soam, William T. Reach, Edwin Das, Ed Chambers, Blesson Mathew, Heiko Richter   +7 more
doaj   +1 more source

Molecular Gas Morphological Analogs for the Milky Way

The Astrophysical Journal Letters
Complete catalogs of molecular clouds in the Milky Way allow analysis of the molecular medium and the star formation properties of the Milky Way that closely follows the method used for nearby galaxies.
Neal J. Evans II, Davide Elia, Keith Hawkins, Sophia Stuber, Jiayi Sun   +4 more
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Grain growth, optical polarisation, and extinction in interstellar clouds [PDF]

Increases in the wavelength of maximum polarization and the ratio of total to selective extinction are generally assumed to be the result of grain growth in interstellar clouds.
Jones, A. P.
core   +1 more source

Circumstellar dust [PDF]

The presence of dust in the general interstellar medium is inferred from the extinction, polarization, and scattering of starlight; the presence of dark nebulae; interstellar depletions; the observed infrared emission around certain stars and various ...
Dwek, E.
core   +1 more source

Hierarchical Structure and Self-gravity in the Maddalena Giant Molecular Cloud

The Astrophysical Journal
In this work, we present data from the Milky Way Imaging Scroll Painting project for the Maddalena giant molecular cloud (GMC). We decompose the ^13 CO emission datacube of the observed region into hierarchical substructures using a modified dendrogram ...
Renjie Shen, Yuehui Ma, Hongchi Wang, Suziye He, Miaomiao Zhang   +4 more
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Structure and Fragmentation Scale of a Massive Star-forming Filament in NGC 6334: High-resolution Mid-infrared Absorption Imaging with JWST

The Astrophysical Journal Letters
Dense filaments are believed to be representative of the initial conditions of star formation in molecular clouds. We have used the MIRI instrument on JWST to image the massive filament NGC 6334M at d  ∼ 1.3 kpc with unprecedented resolution and dynamic ...
Philippe André, Michael Mattern, Doris Arzoumanian, Yoshito Shimajiri, Annie Zavagno, Daisei Abe, Delphine Russeil   +6 more
doaj   +1 more source