Browsing Faculty of Arts and Sciences by Keyword "ISM"

Now showing items 1-9 of 9

    • The Angular Momentum of Magnetized Molecular Cloud Cores: A Two-Dimensional-Three-Dimensional Comparison 

      Dib, Sami; Hennebelle, Patrick; Pineda, Jaime E.; Csengeri, Timea; Bontemps, Sylvain; Audit, Edouard; Goodman, Alyssa (Institute of Physics Publishing, Inc., 2010)
      In this work, we present a detailed study of the rotational properties of magnetized and self-gravitating dense molecular cloud cores formed in a set of two very high resolution three-dimensional molecular cloud simulations ...

    • The Collimated Jet Source in IRAS 16547-4247: Time Variation, Possible Precession, and Upper Limits to the Proper Motions along the Jet Axis 

      Rodríguez, Luis F.; Moran, James M.; Franco-Hernández, Ramiro; Garay, Guido; Brooks, Kate J.; Mardones, Diego (American Astronomical Society, 2008)
      The triple radio source detected in association with the luminous infrared source IRAS 16547-4247 has previously been studied with high angular resolution and high sensitivity with the Very Large Array at 3.6 cm wavelength. ...

    • The Dynamics of Dense Cores in the Perseus Molecular Cloud II: the Relationship between Dense Cores and the Cloud 

      Kirk, Helen; Pineda, Jaime E.; Johnstone, Doug; Goodman, Alyssa (Institute of Physics Publishing, Inc., 2010)
      We utilize the extensive datasets available for the Perseus molecular cloud to analyze the relationship between the kinematics of small-scale dense cores and the larger structures in which they are embedded. The kinematic ...

    • The High-Density Ionized Gas in the Central Parsec of the Galaxy 

      Zhao, Jun-Hui; Blundell, Raymond; Moran, James M.; Downes, Dennis; Schuster, Karl F.; Marrone, Daniel P. (American Astronomical Society, 2010)
      We report a study of the \(H30\alpha\) line emission at 1.3 mm from the region around Sgr A* made with the Submillimeter Array at a resolution of 2'' over a field of 60'' (2 pc) and a velocity range of \(-360 to +345 km ...

    • Infall and Outflow of Molecular Gas in Sgr B2 

      Qin, Sheng‐Li; Zhao, Jun‐Hui; Moran, James M.; Marrone, Daniel P.; Patel, Nimesh A.; Wang, Jun‐Jie; Liu, Sheng‐Yuan; Kuan, Yi‐Jehng (American Astronomical Society, 2008)
      Observations of two \(H_2CO (3_{03}-2_{02} and 3_{21}-2_{20})\) lines and continuum emission at 1.3 mm toward Sgr B2(N) and Sgr B2(M) have been carried out with the SMA. The mosaic maps of Sgr B2(N) and Sgr B2(M) in both ...

    • The Parsec‐Scale Accretion Disk in NGC 3393 

      Kondratko, Paul T.; Greenhill, Lincoln J.; Moran, James M. (American Astronomical Society, 2008)
      We present a Very Long Baseline Interferometry image of the water maser emission in the nuclear region of NGC 3393. The maser emission has a linear distribution oriented at a position angle of ~–34°, perpendicular to both ...

    • A Reassessment of the Kinematics of PV Cephei Based on Accurate Proper Motion Measurements 

      Loinard, Laurent; Rodríguez, Luis F.; Gómez, Laura; Cantó, Jorge; Raga, Alejandro C.; Goodman, Alyssa; Arce, Héctor G. (Universidad Nacional Autónoma de México, 2010)
      We present two Very Large Array observations of the pre-main-sequence star PV Cephei, taken with a separation of 10.5 years. These data show that the proper motions of this star are \(\mu_{\alpha} = +10.9 \pm 3.0 \ mas \ ...

    • The Solar Wind Charge-eXchange Contribution to the Local Soft X-ray Background: Model to Data Comparison in the 0.1-1.0 keV Band 

      Koutroumpa, Dimitra; Lallement, Rosine; Kharchnko, Vasili; Dalgarno, Alexander (Springer Verlag, 2008)
      The major sources of the Soft X-ray Background (SXRB), besides distinct structures as supernovae and superbubbles (e.g. Loop I), are: (i) an absorbed extragalactic emission following a power law, (ii) an absorbed thermal ...

    • Star Formation in the Taurus filament L 1495: from Dense Cores to Stars 

      Schmalzl, Markus; Kainulainen, Jouni; Quanz, Sascha P.; Alves, João; Goodman, Alyssa; Henning, Thomas; Launhardt, Ralf; Pineda, Jaime E.; Román-Zúñiga, Carlos G. (Institute of Physics Publishing, Inc., 2010)
      We present a study of dense structures in the L1495 filament in the Taurus Molecular Cloud and examine its star-forming properties. In particular we construct a dust extinction map of the filament using deep near-infrared ...