Abstract
view Abstract Citations (1) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Invisible Matter in the Solar Neighborhood. Kumar, S. S. Abstract 9, India. It is known that the visible stars and the interstellar atomic hydrogen cannot account for all the mass existing in the neighborhood of the sun. It is proposed here that planetary objects, which get formed by the contraction of stars of very low mass (M~0.07 Mo) to the black dwarf stage, contribute significantly to the unexplained or invisible matter in the vicinity of the sun. It takes a star of mass 0.04 Mo, assumed to be the average mass for a planetary object, only 100 million years after its birth, to become invisible. Therefore, the number of planetary objects within 20 pc from the sun is about 15 000. The mean density of the invisible matter in the form of planetary objects is 1 X 10-24 g/cm3 in this region. Publication: The Astronomical Journal Pub Date: March 1964 DOI: 10.1086/109244 Bibcode: 1964AJ.....69..143K full text sources ADS |
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