Interstellar molecular hydrogen toward zeta Puppis
1976; IOP Publishing; Volume: 204; Linguagem: Inglês
10.1086/154144
ISSN1538-4357
AutoresD. C. Morton, H. L. Dinerstein,
Tópico(s)Astrophysics and Star Formation Studies
Resumoview Abstract Citations (130) References (43) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Interstellar molecular hydrogen toward Zeta Puppis. Morton, D. C. ; Dinerstein, H. L. Abstract This paper reports the measurement of some 136 interstellar H2 absorption lines found in a continuous scan of the far-ultraviolet spectrum of zeta Pup at 0.05-A resolution with the Copernicus telescope. Absorptions from only the rotational levels 0 to 5 of the lowest vibrational state of the ground electronic state were observed. The total H2 column density is 2.8 by 10 to the 14th power molecules/sq cm; the ratio of H nuclei in H2 to the number in H I plus molecules is 6 by 10 to the -6th power; the population of the rotational levels can be represented by a single excitation temperature of 1120 (plus or minus 80) K. The radial velocities of all rotational levels were the same within 7 km/s and differed from most atoms and first ions by no more than 4.5 km/s on the average. The tables also list the best available data on wavelengths, oscillator strengths, and radiative damping constants for all the H2 lines with zero vibrational level likely to be observed in the interstellar gas. Publication: The Astrophysical Journal Pub Date: February 1976 DOI: 10.1086/154144 Bibcode: 1976ApJ...204....1M Keywords: H Lines; Hydrogen Clouds; Interstellar Gas; Molecular Spectra; Ultraviolet Absorption; Electron States; Far Ultraviolet Radiation; Molecular Oscillations; Molecular Rotation; Tables (Data); Ultraviolet Spectra; Astrophysics full text sources ADS |
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