abstracts[] |
{'sha1': 'f53d36e2eefd2416d81aff6e0be9f04b923e9b10', 'content': 'Very Large Array observations of the extreme carbon star IRC+10216 at 7 mm\nwavelength with 40 milli-arcsecond resolution resolve the object\'s radio\nemission, which forms an almost round uniform disk of 83 milli arcseconds\ndiameter, corresponding to 11 AU (for an assumed distance of 130 pc). We find a\nbrightness temperature of 1630 K for the radio photosphere. Since the emission\nis optically thick, we can directly estimate IRC+10216\'s average luminosity,\nwhich is 8600 L(Sun). This value is in excellent agreement with what is\npredicted from the period-luminosity relation for carbon-rich Miras. Assuming\nan effective temperature of 2750 K for IRC+10216, it implies an optical\nphotospheric diameter of 3.8 AU. Our precise determination of IRC+10216\'s\nproper motion fits the picture presented by far-ultraviolet and far-infrared\nwavelength observations of its interaction region with the interstellar medium\n(its "astrosphere"): the star moves roughly in the direction expected from the\nmorphology of the termination shock and its astrotail structures. Calculation\nof its three dimensional velocity and an analysis of the kinematics of its\nsurrounding interstellar medium (ISM) suggest an appreciable relative velocity\nof 42 km s/s, which is about half the value discussed in recent studies. This\nsuggests a lower (time-averaged) mass loss rate and/or a higher ISM density\nthan previously assumed.', 'mimetype': 'text/plain', 'lang': 'en'}
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contribs[] |
{'index': 0, 'creator_id': None, 'creator': None, 'raw_name': 'K. M. Menten', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
{'index': 1, 'creator_id': None, 'creator': None, 'raw_name': 'M. J. Reid', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
{'index': 2, 'creator_id': None, 'creator': None, 'raw_name': 'T. Kaminski', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
{'index': 3, 'creator_id': None, 'creator': None, 'raw_name': 'M. J. Claussen', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
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ext_ids |
{'doi': None, 'wikidata_qid': None, 'isbn13': None, 'pmid': None, 'pmcid': None, 'core': None, 'arxiv': '1205.6739v2', 'jstor': None, 'ark': None, 'mag': None, 'doaj': None, 'dblp': None, 'oai': None, 'hdl': None}
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en
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license_slug |
ARXIV-1.0
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[]
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release_date |
2012-06-30
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release_stage |
accepted
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release_type |
article
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release_year |
2012
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title |
The size, luminosity and motion of the extreme carbon star IRC+10216 (CW
Leonis)
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v2
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mi4g26jwrvdjjlf2uinmzvnk7q
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