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מאמרים קשורים
ROSAT All-Sky Survey Observations of the Hyades Cluster
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1995ApJ...448..683S&db_key=AST
| The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars
The Henry Draper Extension Charts (HDEC), published in the form offinding charts, provide spectral classification for some 87000 starsmostly between 10th and 11th magnitude. This data, being highlyvaluable, as yet was practically unusable for modern computer-basedastronomy. An earlier pilot project (Roeser et al. 1991) demonstrated apossibility to convert this into a star catalogue, using measurements ofcartesian coordinates of stars on the charts and positions of theAstrographic Catalogue (AC) for subsequent identification. We presenthere a final HDEC catalogue comprising accurate positions, propermotions, magnitudes and spectral classes for 86933 stars of the HenryDraper Extension Charts.
| A radial-velocity survey of the Hyades
Photoelectric radial-velocity measurements, obtained with external erroras small as 0.1 km/s using the 200-inch Hale telescope at PalomarObservatory during the period 1971-1986, are reported for over 400candidate members (with V magnitude between 6 and 14) of the Hyadescluster. The history of Hyades observations is recalled; the Palomarinstrumentation and observing program are described; the data-reductionand standardization procedures are discussed in detail; and the data arepresented in extensive tables and graphs. About 200 of the stars areclassified as cluster members, including 60 spectroscopic binaries.
| Photometry of possible members of the Hyades cluster III
Photoelectric photometry in BVRI colors has been obtained for 61 starsin the region surrounding the Hyades cluster. Almost all stars observedhere were found by Giclas or Luyten to possess proper motions resemblingthose of confirmed Hyades members. They cover the ranges between 0.6 and1.7 in (B-V) and 0.2 and 1.3 in (R-I) and are thus mostly late G, K, andearly M stars. Of these 61 stars, only 24 are found to be probablemembers and five are found to be possible members from their positionsin either the V,(B-V) or V,(R-I) diagrams. Nonetheless, these probablemembers enrich the cluster well beyond the list of Pels, Oort, andPels-Kluyver, especially in its southwestern quadrant.
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משמש של הקבוצה הבאה
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תצפית ומידע אסטרומטרי
| קבוצת-כוכבים: | שור |
| התרוממות ימנית: | 04h53m01.14s |
| סירוב: | +23°29'13.2" |
| גודל גלוי: | 10.642 |
| תנועה נכונה: | 124.8 |
| תנועה נכונה: | -110.3 |
| B-T magnitude: | 11.681 |
| V-T magnitude: | 10.728 |
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