Improved Astrometry and Photometry for the Luyten Catalog. II. Faint Stars and the Revised Catalog

By S. Salim, A. Gould. 2002

207 citations recorded by the source corpus.

We complete construction of a catalog containing improved astrometry and new optical/infrared photometry for the vast majority of NLTT stars lying in the overlap of regions covered by POSS I and by the second incremental 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 to 0.25 mag. Relative proper motions of binary components are measured to 3 mas yr-1. The false-identification rate is ~1% for 11 ≲ V ≲ 18 and substantially less at brighter magnitudes. These improvements permit the construction of a reduced proper-motion diagram that, for the first time, allows one to classify NLTT stars into main-sequence (MS) stars, subdwarfs (SDs), and white dwarfs (WDs). We in turn use this diagram to analyze the properties of both our catalog and the NLTT catalog on which it is based. In sharp contrast to popular belief, we find that NLTT incompleteness in the plane is almost completely concentrated in MS stars, and that SDs and WDs are detected almost uniformly over the sky δ > -33°. Our catalog will therefore provide a powerful tool to probe these populations statistically, as well as to reliably identify individual SDs and WDs.

Subfields: Astronomy and Astrophysics, Computational Mechanics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/62b5c374caa8e09aa66f39d1901d12e4b8825ae8

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Computational Mechanics

In Instrumentation

Citations in the corpus

Meeting the Cool Neighbors. VIII. A Preliminary 20 Parsec Census from the NLTT Catalogue (2004, methodology): “…from both our own cross- referencing of the NLTT catalogue and the 2MASS Second Incremental release, and from 1Visiting Astronomer, Kitt Peak National Observatory, NOAO, which is operated by AURA under cooperative agreement with the NSF. – 2 – the revised NLTT compiled by Salim & Gould (2003).”
BAYESIAN ANALYSIS TO IDENTIFY NEW STAR CANDIDATES IN NEARBY YOUNG STELLAR KINEMATIC GROUPS (2012, unknown): “…(x) Koen et al. 2002; (y) NOMAD; Zacharias et al. 2005; (z) PPMXL; Roeser et al. 2010; (aa) PPMX; Roeser et al. 2008; (bb) Looper et al. 2010; (cc) Salim & Gould 2003; (dd) Zickgraf et al. 2005; (ee)Shkolnik et al. 2011; (ff) Kiss et al. 2011; (gg) Herbig & Bell1988; (hh) Shkolnik et al. 2009;…”
INFRARED SIGNATURES OF DISRUPTED MINOR PLANETS AT WHITE DWARFS (2009, methodology): “Optical and near-infrared photometric data were taken from: Table 2 references; McCook & Sion (2006) and references therein, Salim & Gould (2003), Monet et al. (2003), and the 2MASS point source catalog (Skrutskie et al. 2006).”
A Catalog of Northern Stars with Annual Proper Motions Larger than 015 (LSPM-NORTH Catalog) (2004, methodology): “As demonstrated by Salim & Gould (2003), the NLTT positions are accurate to no better than a few arcseconds, with some stars having positional errors of up to a few arcminutes.”
A SPECTROSCOPIC CATALOG OF THE BRIGHTEST (J < 9) M DWARFS IN THE NORTHERN SKY, (2012, methodology): “In addition, cross-matching against 2MASS and examination of Digitized Sky Survey images has uncovered significant (> 1′) errors in many of the coordinates quoted in the Luyten catalogs, which was hitherto preventing efficient follow-up studies Bakos, Sahu, & Nemeth (2002); Salim & Gould (2003).”
The 2MASS Wide-Field T Dwarf Search. III. Seven New T Dwarfs and Other Cool Dwarf Discoveries (2004, background): “′′04 yr−1, measured from Lick 3m Gemini J-band imaging (see § 3.3), excludes it from the NLTT (Luyten 1979) and revised NLTT (Salim & Gould 2003) proper motion catalogs.”
An Improved Proper-Motion Catalog Combining USNO-B and the Sloan Digital Sky Survey (2004, methodology): “1, but for r < 20 Gould (2003) assessed the completeness of USNO-B for high proper motion objects by comparing it with the revised New Luyten Two-Tenths catalog (rNLTT; Gould & Salim 2003; Salim & Gould 2003).”
The White Dwarf Luminosity Function from Sloan Digital Sky Survey Imaging Data (2005, unknown): “For larger proper motions, the correction was derived by comparison with the revised New Luyten Two Tenths Catalog (rNLTT; Salim & Gould 2003), under the assumption that the rNLTT is itself 90% complete (Lépine & Shara 2005).”