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HD 222701


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The early F-type stars - Refined classification, confrontation with Stromgren photometry, and the effects of rotation
The classification for early F-type stars in the MK spectralclassification system presented by Gray and Garrison (1987) is refined.The effect of rotation on spectral classification and ubvy-betaphotometry of early F-type stars is examined. It is found that theclassical luminosity criterion, the 4417 A/4481 A ratio givesinconsistent results. It is shown that most of the stars in the DeltaDelphini class of metallic-line stars are either normal or areindistinguishable from proto-Am stars. It is suggested that thedesignation Delta Delphini should be dropped. The classifications arecompared with Stromgren photometry. The effects of rotation on thedelta-c1 index in the early-F field dwarfs is demonstrated.

A finding list of early-type stars near the south galactic pole.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1971AJ.....76..338S&db_key=AST

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观测天体数据

星座:玉夫座
右阿森松:23h43m07.17s
赤纬:-36°47'05.9"
视星:7.454
距离:152.672 天文距离
右阿森松适当运动:14.1
赤纬适当运动:4.3
B-T magnitude:7.8
V-T magnitude:7.483

目录:
适当名称   (Edit)
HD 1989HD 222701
TYCHO-2 2000TYC 7521-1234-1
USNO-A2.0USNO-A2 0525-44339446
HIPHIP 116998

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