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LSII+34°26, AN UNUSUAL B SUPERGIANT LOCATED NEAR THE OUTER EDGE OF THE GALAXY

DAVID G. TURNER and JOHN S. DRILLING
Publications of the Astronomical Society of the Pacific
Vol. 96, No. 578 (April 1984), pp. 292-296
Stable URL: http://www.jstor.org/stable/40678318
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
LSII+34°26, AN UNUSUAL B SUPERGIANT LOCATED NEAR THE OUTER EDGE OF THE GALAXY
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Abstract

Photometric and spectroscopic observations are presented for LSII + 34°26, a variable 11th-magnitude, emission-line, B1.5 la-labe supergiant which lies $1.8_{ - 0.4}^{ + 0.8} $ of kpc below the galactic plane in Cygnus at the extremely large distance of $17.8_{ - 3.7}^{ + 8.4} $ kpc. The star's radial velocity of VLSR = — 75 km s⁻¹ is used to examine the galactic rotation law at large galactocentric distances, and it is argued that the linear rotational velocity at 18 kpc from the galactic center is at least as large as, and more likely larger than, that established for the sun's distance from the galactic center.

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