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Browsing by Subject "ISM: molecules"

Browsing by Subject "ISM: molecules"

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  • ATOMS: ALMA three-millimeter observations of massive star-forming regions – VII. A catalogue of SiO clumps from ACA observations 
    Liu, Rong; Liu, Tie; Chen, Gang; Liu, Hong-Li; Wang, Ke; Li, Jin-Zeng; Lee, Chang Won; Liu, Xunchuan; Juvela, Mika; Garay, Guido; Dewangan, Lokesh; Archana Soam; Bronfman, Leonardo; He, Jinhua; Eswaraiah, Chakali; Zhang, Si-Ju; Zhang, Yong; Xu, Feng-Wei; Tóth, L. Viktor; Shen, Zhi-Qiang; Li, Shanghuo; Wu, Yue-Fang; Qin, Sheng-Li; Ren, Zhiyuan; Zhang, Guoyin; Tej, Anandmayee; Goldsmith, Paul F; Baug, Tapas; Luo, Qiuyi; Zhou, Jianwen; Zhang, Chang (Oxford University Press on behalf of Royal Astronomical Society, 2022-04)
    To understand the nature of SiO emission, we conducted ACA observations of the SiO (2-1) lines toward 146 massive starforming regions, as part of the ALMA Three-millimeter Observations of Massive Star-forming regions (ATOMS) ...
  • First evidence of the possible detection of diffuse circumstellar bands in AGB descendants 
    Di­az-Luis, J. J; Garcia-Hernandez, D. A; Kameswara Rao, N; Manchado, A; Cataldo, F (Societa Astronomica Italiana, 2016-06)
    The short transition phase between asymptotic giant branch stars (AGB; when circumstellar envelopes rich in small organic molecules are efficiently created) and planetary nebulae (PNe) represents a most active phase of ...
  • Fullerenes in the circumstellar medium of Herbig Ae/Be stars: insights from the Spitzer mid-infrared spectral catalog 
    Arun, R; Mathew, Blesson; Manoj, P; Maheswar, G; Shridharan, B; Kartha, Sreeja S; Narang, Mayank (Oxford University Press on behalf of Royal Astronomical Society, 2023-08)
    This study presents the largest mid-infrared spectral catalogue of Herbig Ae/Be stars to date, containing the Spitzer Infrared Spectrograph spectra of 126 stars. Based on the catalogue analysis, two prominent infrared ...
  • High-resolution Optical Spectroscopy of DY Cen: Diffuse Interstellar Bands in a Proto-fullerene Circumstellar Environment? 
    Garcia-Hernandez, D. A; Kameswara Rao, N; Lambert, D. L (IOP Publishing, 2012-11-01)
    We search high-resolution and high-quality VLT/UVES optical spectra of the hot R Coronae Borealis star DY Cen for electronic transitions of the C60 molecule and diffuse interstellar bands (DIBs). We report the non-detection ...
  • Implications of a hot atmosphere/corino from ALMA observations toward NGC 1333 IRAS 4A1 
    Sahu, Dipen; Liu, Sheng-Yuan; Su, Yu-Nung; Li, Zhi-Yun; Lee, Chin-Fei; Hirano, Naomi; Takakuwa, Shigehisa (IOP Publishing, 2019-02-20)
    We report high angular resolution observations of NGC 1333 IRAS 4A, a protostellar binary including A1 and A2, at 0.84 mm with the Atacama Large Millimeter/submillimeter Array. From the continuum observations, we suggest ...
  • Molecular gas and star formation in void galaxies 
    Das, Mousumi; Saito, T; Iono, D; Honey, M; Ramya, S (International Astronomical Union, 2016-10)
    We present the detection of molecular gas using CO(1–0) line emission and followup Hα imaging observations of galaxies located in nearby voids. The CO(1–0) observations were done using the 45m telescope of the Nobeyama ...
  • Occurrence of thermal instability in molecular clouds 
    Nejad-Asghar, M; Ghanbari, J (Astronomical Society of India, 2004-09)
    Linear perturbation is used on the complete MHD equations of the magnetic molecular clouds. We carry out a comparison of characteristic time-scales, and find conditions which linear thermal instability causes to form the ...
  • Optical Emission Bands in the Spectrum of the R-Coronae and V854-CENTAURI at Minimum 
    Kameswara Rao, N; Lambert, D. L (Royal Astronomical Society, 1993-08-01)
    Several unidentified broad emission features, previously seen only in the spectrum of the nebulosity in the Red Rectangle, have been observed in a spectrum of the R CrB star V854 Cen taken in a deep minimum. Similarities ...
  • A search for diffuse bands in fullerene planetary nebulae: evidence of diffuse circumstellar bands 
    Diaz-Luis, J. J; Garcia-Hernandez, D. A; Kameswara Rao, N; Manchado, A; Cataldo, F (EDP Sciences, 2015-01)
    Large fullerenes and fullerene-based molecules have been proposed as carriers of diffuse interstellar bands (DIBs). The recent detection of the most common fullerenes (C60 and C70) around some planetary nebulae (PNe) now ...

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