Radial velocity distribution and line strengths of 33 carbon stars in the Galactic bulge
This paper presents optical spectra of 33 carbon stars discovered by Azzopardi et al. (1985) in low-extinction windows to the Galactic bulge. From these spectra, the radial velocity distribution for the stars was obtained; the dispersion was found to be 113 + or - 14 km/sec (consistent with that of...
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| Veröffentlicht in: | The Astrophysical journal 1991-02, Vol.367 (2), p.547-560 |
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| creator | TYSON, N. D RICH, R. M |
| description | This paper presents optical spectra of 33 carbon stars discovered by Azzopardi et al. (1985) in low-extinction windows to the Galactic bulge. From these spectra, the radial velocity distribution for the stars was obtained; the dispersion was found to be 113 + or - 14 km/sec (consistent with that of the bulge K and M giants) and the mean to be -44 + or - 20 km/sec. From the velocity distribution, it was found that the carbon stars do not share the kinematics of the local neighborhood and are likely to be genuine bulge members, making it possible to assign distances and accurate luminosities. Nineteen of the stars showed enhanced C-13, classifying them as J-star candidates. Two stars showed weak C2 absorption, classifying them as CS stars, and thirteen carbon stars appeared to be hydrogen-deficient. 63 refs. |
| doi_str_mv | 10.1086/169651 |
| format | Article |
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D</creatorcontrib><creatorcontrib>RICH, R. M</creatorcontrib><title>Radial velocity distribution and line strengths of 33 carbon stars in the Galactic bulge</title><title>The Astrophysical journal</title><description>This paper presents optical spectra of 33 carbon stars discovered by Azzopardi et al. (1985) in low-extinction windows to the Galactic bulge. From these spectra, the radial velocity distribution for the stars was obtained; the dispersion was found to be 113 + or - 14 km/sec (consistent with that of the bulge K and M giants) and the mean to be -44 + or - 20 km/sec. From the velocity distribution, it was found that the carbon stars do not share the kinematics of the local neighborhood and are likely to be genuine bulge members, making it possible to assign distances and accurate luminosities. Nineteen of the stars showed enhanced C-13, classifying them as J-star candidates. 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D</creatorcontrib><creatorcontrib>RICH, R. M</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>TYSON, N. D</au><au>RICH, R. M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Radial velocity distribution and line strengths of 33 carbon stars in the Galactic bulge</atitle><jtitle>The Astrophysical journal</jtitle><date>1991-02-01</date><risdate>1991</risdate><volume>367</volume><issue>2</issue><spage>547</spage><epage>560</epage><pages>547-560</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>This paper presents optical spectra of 33 carbon stars discovered by Azzopardi et al. (1985) in low-extinction windows to the Galactic bulge. From these spectra, the radial velocity distribution for the stars was obtained; the dispersion was found to be 113 + or - 14 km/sec (consistent with that of the bulge K and M giants) and the mean to be -44 + or - 20 km/sec. From the velocity distribution, it was found that the carbon stars do not share the kinematics of the local neighborhood and are likely to be genuine bulge members, making it possible to assign distances and accurate luminosities. Nineteen of the stars showed enhanced C-13, classifying them as J-star candidates. Two stars showed weak C2 absorption, classifying them as CS stars, and thirteen carbon stars appeared to be hydrogen-deficient. 63 refs.</abstract><cop>Chicago, IL</cop><pub>University of Chicago Press</pub><doi>10.1086/169651</doi><tpages>14</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | The Astrophysical journal, 1991-02, Vol.367 (2), p.547-560 |
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| language | eng |
| recordid | cdi_osti_scitechconnect_6002581 |
| source | Alma/SFX Local Collection |
| subjects | 640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources Astronomy CARBON STARS CHEMICAL COMPOSITION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DISTANCE Earth, ocean, space ELEMENTS Exact sciences and technology GALAXIES GIANT STARS HYDROGEN LUMINOSITY MAIN SEQUENCE STARS MILKY WAY MORPHOLOGY NONMETALS OPTICAL PROPERTIES PHYSICAL PROPERTIES Pre-main sequence objects, young stellar objects (yso's) and protostars (t tauri stars, orion population, herbig-haro objects, bok globules, bipolar outflows, cometary nebulae, etc.) RADIAL VELOCITY SPECTRA SPECTROSCOPY STAR EVOLUTION STARS VELOCITY VISIBLE SPECTRA |
| title | Radial velocity distribution and line strengths of 33 carbon stars in the Galactic bulge |
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