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מאמרים קשורים
Improved Astrometry and Photometry for the Luyten Catalog. II. Faint Stars and the Revised Catalog
We complete construction of a catalog containing improved astrometry andnew optical/infrared photometry for the vast majority of NLTT starslying in the overlap of regions covered by POSS I and by the secondincremental Two Micron All Sky Survey (2MASS) release, approximately 44%of the sky. The epoch 2000 positions are typically accurate to 130 mas,the proper motions to 5.5 mas yr-1, and the V-J colors to0.25 mag. Relative proper motions of binary components are measured to 3mas yr-1. The false-identification rate is ~1% for11<~V<~18 and substantially less at brighter magnitudes. Theseimprovements permit the construction of a reduced proper-motion diagramthat, for the first time, allows one to classify NLTT stars intomain-sequence (MS) stars, subdwarfs (SDs), and white dwarfs (WDs). We inturn use this diagram to analyze the properties of both our catalog andthe NLTT catalog on which it is based. In sharp contrast to popularbelief, we find that NLTT incompleteness in the plane is almostcompletely concentrated in MS stars, and that SDs and WDs are detectedalmost uniformly over the sky δ>-33deg. Our catalogwill therefore provide a powerful tool to probe these populationsstatistically, as well as to reliably identify individual SDs and WDs.
| The Palomar/MSU Nearby Star Spectroscopic Survey.II.The Southern M Dwarfs and Investigation of Magnetic Activity
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....112.2799H&db_key=AST
| The general catalogue of trigonometric [stellar] paralaxes
Not Available
| Proper motions in the southern ESO areas 207, 439, and 440
Proper motion stars have been identified from red IIIaF EuropeanSouthern Observatory (ESO) Schmidt plates. This calalog includes starsfound in ESO Areas 207, 439, and 440 having mu greater than or equal to0.1 sec/yr. Finding charts for stars with mu greater than or equal to0.25 sec/yr are provided.
| UBV (RI)c photometry of faint nearby stars.
Not Available
| UBV Photometry of 500 Southern Stars [erratum: 1973MNSSA..32...48C]
Not Available
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הכנס מאמר חדש
לינקים קשורים
הכנס לינק חדש
משמש של הקבוצה הבאה
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תצפית ומידע אסטרומטרי
| קבוצת-כוכבים: | ירכתי הספינה |
| התרוממות ימנית: | 07h06m13.97s |
| סירוב: | -47°35'13.8" |
| גודל גלוי: | 10.611 |
| מרחק: | 47.037 פארסק |
| תנועה נכונה: | 138.3 |
| תנועה נכונה: | -143.6 |
| B-T magnitude: | 11.792 |
| V-T magnitude: | 10.709 |
קטלוגים וכינוים:
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