English
Related papers

Related papers: Gas velocity structure of the Orion A Integral Sha…

200 papers

We report on a novel kind of small scale structure in molecular clouds found in IRAM-30m and CSO maps of 12CO and 13CO lines around low mass starless dense cores. These structures come to light as the locus of the extrema of velocity shears…

Astrophysics · Physics 2009-11-10 J. Pety , E. Falgarone

We present a molecular line study of the Sh2-138 (IRAS 22308+5812) hub-filament system with an aim to investigate its structure and kinematics. Archival CO molecular line data from the Canadian Galactic Plane Survey (CO(J=1-0)) for the…

Astrophysics of Galaxies · Physics 2023-03-01 Kshitiz Mallick , Lokesh Dewangan , Devendra Ojha , Tapas Baug , Igor Zinchenko

We have carried out survey observations toward the Galactic plane at l~38 deg in the 12CO and 13CO J=1-0 lines using the Nobeyama Radio Observatory 45-m telescope. A wide area (0.8 x 0.8 deg) was mapped with high spatial resolution (17").…

Astrophysics of Galaxies · Physics 2012-06-06 Tsuyoshi Sawada , Tetsuo Hasegawa , Masahiro Sugimoto , Jin Koda , Toshihiro Handa

We have used the capabilities of ALMA to probe the ionized gas towards the Galactic center with the H30alpha mm hydrogen recombination line within 30'' of the Galaxy's dynamical center. The observations are made with spatial and spectral…

Astrophysics of Galaxies · Physics 2019-02-13 Marc J. Royster , Farhad Yusef-Zadeh , Mark Wardle , Devaky Kunneriath , William Cotton , Doug A. Roberts

The $^{12}$CO $(J=1\rightarrow0)$ velocity fields of a sample of 20 nearby spiral galaxies, selected from the CO Multi-line Imaging of Nearby Galaxies (COMING) legacy project of Nobeyama Radio Observatory, have been analyzed by Fourier…

Determining the properties of the warm ionized medium (WIM) at the leading edge of spiral arms is important for understanding its dynamics and cloud formation. The inner edge of the Scutum arm tangency is a unique location in which to…

Astrophysics of Galaxies · Physics 2017-11-29 W. D. Langer , T. Velusamy , P. F. Goldsmith , J. L. Pineda , E. T. Chambers , G. Sandell , C. Risacher , K. Jacobs

We compute structure functions and Fourier spectra of 2D centroid velocity (CV) maps in order to study the gas dynamics of typical molecular clouds (MCs) in numerical simulations. We account for a simplified treatment of time-dependent…

Solar and Stellar Astrophysics · Physics 2015-06-23 Erik Bertram , Lukas Konstandin , Rahul Shetty , Simon C. O. Glover , Ralf S. Klessen

We present observations towards one of the closest regions of high mass star formation, Orion BN/KL, performed at both low resolution mode (grating mode) and high resolution mode (Fabry-Perot) with the Long Wavelength Spectrometer on board…

Astrophysics · Physics 2007-05-23 S. Maret , E. Caux , J. P. Baluteau , C. Ceccarelli , C. Gry , C. Vastel

We have obtained high resolution FUSE and HST/STIS echelle observations of the quasar PG 1116+215. The semi-continuous coverage of the ultraviolet spectrum over the wavelength range 916-2800 provides detections of Galactic and high velocity…

Astrophysics · Physics 2009-11-10 Rajib Ganguly , Kenneth R. Sembach , Todd M. Tripp , Blair D. Savage

We present experimental observations of the velocity and spatial distribution of inertial particles dispersed in the turbulent downward flow through a vertical channel at $Re_{\tau} = 235$ and $335$. The working fluid is air laden with…

Fluid Dynamics · Physics 2019-04-16 Kee Onn Fong , Omid Amili , Filippo Coletti

We identify 45 protostellar outflows in CO maps of the Orion A giant molecular cloud from the CARMA-NRO Orion survey. Our sample includes 11 newly detected outflows. We measure the mass and energetics of the outflows, including material at…

We present new L-band ($1\mbox{--}2$ GHz) observations of the nearby spiral galaxy M33 with 80 pc resolution obtained with the Karl G. Jansky Very Large Array. The HI observations, combined with HI measurements from the Green Bank…

We present ionized-gas (OIII) and stellar kinematics (velocities and velocity dispersions) for 30 nearly face-on spiral galaxies out to as much as three disk scale lengths (h_R). These data have been derived from PPak IFU spectroscopy…

We present a study of the filamentary structure in the emission from the neutral atomic hydrogen (HI) at 21 cm across velocity channels in the 40'' and 1.5-km/s resolution position-position-velocity cube resulting from the combination of…

The present study aims to characterise the physical and chemical properties of the protostellar core Orion B9-SMM3. The APEX telescope was used to perform a follow-up molecular line survey of SMM3. The following species were identified from…

Astrophysics of Galaxies · Physics 2016-07-13 Oskari Miettinen

We present optical integral field spectroscopy $-$ obtained with the Gemini Multi-Object Spectrograph $-$ of the inner $4.0 \times 5.8$ kpc$^2$ of the narrow line radio galaxy 3C 33 at a spatial resolution of 0.58 kpc. The gas emission…

Astrophysics of Galaxies · Physics 2017-07-19 Guilherme S. Couto , Thaisa Storchi-Bergmann , Allan Schnorr-Müller

We present high spatial resolution optical integral field spectroscopy of a collimated Herbig-Haro jet viewed nearly edge-on. Maps of the line emission, velocity centroid, and velocity dispersion were generated for the H$\alpha$ and [S II]…

Astrophysics · Physics 2008-11-26 Tracy L. Beck , A. Riera , A. C. Raga , Bo Reipurth

We report the discovery of a velocity coherent, funnel shaped ^13CO emission feature in the Galactic centre (GC) using data from the SEDIGISM survey. The molecular cloud appears as a low velocity structure (V_LSR=[-3.5, +3.5] km/s) with an…

We present a map of the spiral structure of the Galaxy, as traced by molecular CS emission associated with IRAS sources which are believed to be compact HII regions. The CS line velocities are used to determine the kinematic distances of…

Astrophysics of Galaxies · Physics 2015-05-20 J. R. D. Lepine , A. Roman-Lopes , Zulema Abraham , T. C. Junqueira , Yu. N. Mishurov

We present search results of 22 high latitude (b > 25 deg.) sightlines for OH 18-cm emission using the 305-m radio telescope at the Arecibo Observatory. These sightlines appear in neutral hydrogen emission at intermediate velocities (V_lsr…

Astrophysics of Galaxies · Physics 2023-05-10 Allison Smith , D. Anish Roshi