Browsing FAS Scholarly Articles by Keyword "molecules"

Now showing items 1-6 of 6

    • Dynamics of \(OH(^{2}\Pi)–He\) Collisions in Combined Electric and Magnetic Fields 

      Tscherbul, Timur V.; Groenenboom, Gerrit C.; Krems, Roman V.; Dalgarno, Alexander (Royal Society of Chemistry, 2009)
      We use accurate quantum mechanical calculations to analyze the effects of parallel electric and magnetic fields on collision dynamics of \(OH(^{2}\Pi)\) molecules. It is demonstrated that spin relaxation in \(^{3}He–OH\) ...

    • 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 ...

    • 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 ...

    • Optical Properties of Clusters and Molecules from Real-Time Time-Dependent Density Functional Theory Using a Self-Consistent Field 

      Ren, Jun; Kaxiras, Efthimios; Meng, Sheng (Informa UK Limited, 2010)
      We present a detailed study of optical absorption spectra of finite-size structures, using a method based on time-dependent density-functional theory (TDDFT), which involves a self-consistent field for the propagation of ...

    • 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 ...

    • Wavelength-Dependent UV Photodesorption of Pure \(N_2\) and \(O_2\) Ices 

      Fayolle, Edith C.; Bertin, M.; Romanzin, C.; Poderoso, H. A. M.; Philippe, L.; Michaut, X.; Jeseck, P.; Linnartz, H.; Oberg, Karin; Fillion, J.-H. (EDP Sciences, 2013)
      Context: Ultraviolet photodesorption of molecules from icy interstellar grains can explain observations of cold gas in regions where thermal desorption is negligible. This non-thermal desorption mechanism should be especially ...