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相关论文: Characterizing interstellar filaments with Hersche…

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The dust sub-millimetre polarisation of star-forming clouds carries information on dust and the role of magnetic fields in cloud evolution. With observations of a dense filamentary cloud G035.39-00.33, we aim to characterise the dust…

We present a power spectrum analysis of the Herschel-SPIRE observations of the Polaris flare, a high Galactic latitude cirrus cloud midway between the diffuse and molecular phases. The SPIRE images of the Polaris flare reveal for the first…

To probe the ongoing physical mechanism, we studied a wide-scale environment around AFGL 5142 (area ~25 pc x 20 pc) using a multi-wavelength approach. The Herschel column density (N(H_2)) map reveals a massive inverted Y-like structure…

星系天体物理 · 物理学 2019-05-01 Lokesh K. Dewangan , Devendra K. Ojha , Tapas Baug , R. Devaraj

Starless cores represent the initial stage of evolution toward (proto)star formation, and a subset of them, known as prestellar cores, with high density (~ 10^6 cm^-3 or higher) and being centrally concentrated are expected to be embryos of…

We identify 225 filaments from an H$_2$ column density map constructed using simultaneous $^{12}$CO, $^{13}$CO, and C$^{18}$O (J=1-0) observations carried out as a part of the MWISP project. We select 46 long filaments with lengths above…

星系天体物理 · 物理学 2021-11-03 Yuqing Zheng , Hongchi Wang , Yuehui Ma , Chong Li

The interstellar medium has a highly filamentary and hierarchical structure, which may play a significant role in star formation. A systematical study on the large-scale filaments towards their physical parameters, distribution, structures…

星系天体物理 · 物理学 2022-01-06 Yifei Ge , Ke Wang

Recent Herschel observations have confirmed that filaments are ubiquitous in molecular clouds and suggest that irrespectively of the column density, there is a characteristic width of about 0.1 pc whose physical origin remains unclear. We…

星系天体物理 · 物理学 2015-06-17 Patrick Hennebelle , Philippe André

We use R-band CCD linear polarimetry collected for about 12000 background field stars in 46 fields of view toward the Pipe nebula to investigate the properties of the polarization across this dark cloud. Based on archival 2MASS data we…

星系天体物理 · 物理学 2015-05-19 G. A. P. Franco , F. O. Alves , J. M. Girart

G351.776-0.527 is among the most massive, closest, and youngest filaments in the inner Galactic plane and therefore it is an ideal laboratory to study the kinematics of dense gas and mass replenishment on a large scale. In this paper, we…

We present a detailed study of the Orion B clouds (d~400 pc), imaged with the PACS/SPIRE cameras at 70-500 $\mu$m by the Herschel Gould Belt survey (HGBS). We release new high-res. maps of column density and dust temperature. In the…

We observed high S/N, high velocity resolution NH$_3$(1,1) and (2,2) emission on an extended map in TMC-1, a filamentary cloud in a nearby quiescent star forming area. By fitting multiple hyperfine-split line profiles to the NH$_3$(1,1)…

星系天体物理 · 物理学 2016-05-18 O. Fehér , L. V. Tóth , D. Ward-Thompson , J. Kirk , A. Kraus , V. -M. Pelkonen , S. Pintér , S. Zahorecz

Recent Herschel observations of nearby clouds have shown that filamentary structures are ubiquitous and that most prestellar cores form in filaments. Probing the density ($n$) and velocity ($V$) structure of filaments is crucial for the…

星系天体物理 · 物理学 2023-04-12 Y. Shimajiri , Ph. André , N. Peretto , D. Arzoumanian , E. Ntormousi , V. Könyves

The mass distribution of prestellar cores is obtained for clouds with arbitrary internal mass distributions using a selection criterion based on the thermal and turbulent Jeans mass and applied hierarchically from small to large scales. We…

太阳与恒星天体物理 · 物理学 2012-08-02 Antonio Parravano , Nestor Sanchez , Emilio J. Alfaro

We present an analysis of the outer Galaxy giant molecular filament (GMF) G214.5-1.8 (G214.5) using Herschel data. We find that G214.5 has a mass of $\sim$ 16,000 M$_{\odot}$, yet hosts only 15 potentially protostellar 70 $\mu$m sources,…

星系天体物理 · 物理学 2022-11-16 S. D. Clarke , A. Sanchez-Monge , G. M. Williams , A. D. P. Howard , S. Walch , N. Schneider

Herschel surveys of Galactic clouds support a paradigm for low-mass star formation in which dense filaments play a crucial role. The detailed fragmentation properties of star-forming filaments remain poorly understood, however, and the…

星系天体物理 · 物理学 2019-12-11 Y. Shimajiri , Ph. Andre , E. Ntormousi , A. Men'shchikov , D. Arzoumanian , P. Palmeirim

We present a comprehensive analysis of dense cores and filamentary structures in the M16 Eagle Nebula using high-resolution ($11.7^{\prime\prime}$) surface density and temperature maps derived from \textit{Herschel} observations. Using the…

星系天体物理 · 物理学 2026-05-01 Nageen Pervaiz , Guo-Yin Zhang , Alexander Men'shchikov , Jin-Zeng Li

With recent Herschel observations, the northern filament of the Corona Australis cloud has now been mapped in a number of bands from 1.2um to 870um. The data set provides a good starting point for the study of the cloud over several orders…

星系天体物理 · 物理学 2015-06-05 M. Juvela , V. -M. Pelkonen , G. J. White , V. Konyves , J. Kirk , P. Andre

We study the fragmentation of the nearest high line-mass filament, the integral shaped filament (ISF, line-mass $\sim$ 400 M$_\odot$ pc$^{-1}$) in the Orion A molecular cloud. We have observed a 1.6 pc long section of the ISF with the…

Because of their relatively simple morphology, "bubble" HII regions have been instrumental to our understanding of star formation triggered by HII regions. With the far-infrared (FIR) spectral coverage of the Herschel satellite, we can…

The recent data collected by {\it Herschel} have confirmed that interstellar structures with filamentary shape are ubiquitously present in the Milky Way. Filaments are thought to be formed by several physical mechanisms acting from the…