H216O and H218O maser emission from gas-dust clouds

被引：0
|
作者：
A. V. Nesterenok
D. A. Varshalovich
机构：
[1] Ioffe Physical-Technical Institute,
来源：
Astronomy Letters | 2011年 / 37卷
关键词：
astrophysical masers; heavy-oxygen water; star-forming regions; active galactic nuclei;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The collisional pumping of H216O and H218O masers in hot dense gas-dust clouds has been simulated numerically. New data on the rate coefficients for collisional transitions from Faure et al. (2007) were used in the calculations. The possibility of detecting H218O emission in 22.2-GHz H216O maser sources is investigated. The medium is shown to become optically thick in the H218O lines for which an inverted level population is observed at H2O column densities of ∼1019–1020 cm−2. A simultaneous observation of H218O emission and H216O maser emission in the same source will allow the physical conditions in the gas-dust cloud to be refined.
引用
收藏
页码：456 / 467
页数：11
相关论文
共 50 条
  • [1] H 2 16 O and H 2 18 O maser emission from gas-dust clouds
    Nesterenok, A. V.
    Varshalovich, D. A.
    [J]. ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS, 2011, 37 (07): : 456 - 467
  • [2] Far IR continuum absorption of H216O and H218O
    Odintsova, T. A.
    Tretyakov, M. Yu
    Zibarova, A. O.
    Pirali, O.
    Roy, P.
    Campargue, A.
    [J]. 3RD INTERNATIONAL CONFERENCE TERAHERTZ AND MICROWAVE RADIATION: GENERATION, DETECTION AND APPLICATIONS (TERA-2018), 2018, 195
  • [3] Diffusivity fractionations of H216O/H217O and H216O/H218O in air and their implications for isotope hydrology
    Barkan, Eugeni
    Luz, Boaz
    [J]. RAPID COMMUNICATIONS IN MASS SPECTROMETRY, 2007, 21 (18) : 2999 - 3005
  • [4] FT-IR study of H216O and H218O adsorption on H-ferrierite
    Lee, B
    Kondo, JN
    Domen, K
    Wakabayashi, F
    [J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 1999, 137 (1-3) : 269 - 272
  • [5] Revealing the transport mechanisms of silicon oxidation by H218O/H216O isotopic labeling
    Gong Jia
    Jiang Yi-Ming
    Zhong Cheng
    Deng Bo
    Liu Ping
    Li Jin
    [J]. ACTA PHYSICA SINICA, 2009, 58 (02) : 1305 - 1309
  • [6] All paths lead to hubs in the spectroscopic networks of water isotopologues H216O and H218O
    Roland Tóbiás
    Meissa L. Diouf
    Frank M. J. Cozijn
    Wim Ubachs
    Attila G. Császár
    [J]. Communications Chemistry, 7
  • [7] All paths lead to hubs in the spectroscopic networks of water isotopologues H216O and H218O
    Tobias, Roland
    Diouf, Meissa L.
    Cozijn, Frank M. J.
    Ubachs, Wim
    Csaszar, Attila G.
    [J]. COMMUNICATIONS CHEMISTRY, 2024, 7 (01)
  • [8] Kinetics of the H218O/H216O isotope exchange over vanadia-titania catalyst
    Sadovskaya, E. M.
    Goncharov, V. B.
    Gulyaeva, Yu. K.
    Popova, G. Ya.
    Andrushkevich, T. V.
    [J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2010, 316 (1-2) : 118 - 125
  • [9] Freshwater sources to the coastal ocean off northeastern North America:: Evidence from H218O/H216O
    Khatiwala, SP
    Fairbanks, RG
    Houghton, RW
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1999, 104 (C8) : 18241 - 18255
  • [10] Spectroscopically determined potential energy surfaces of the H216O, H217O, and H218O isotopologues of water
    Shirin, SV
    Polyansky, OL
    Zobov, NF
    Ovsyannikov, RI
    Császár, AG
    Tennyson, J
    [J]. JOURNAL OF MOLECULAR SPECTROSCOPY, 2006, 236 (02) : 216 - 223
12345