PPM-Extended (PPMX) – a catalogue of positions and proper motions

By S. Röser, E. Schilbach, H. Schwan, N. Kharchenko, A. Piskunov, R. Scholz. 2008

138 citations recorded by the source corpus.

Aims. We build a catalogue PPM-Extended (PPMX) on the ICRS system which is complete down to a well-defined limiting magnitude and contains the best presently available proper motions suited for kinematic studies in the Galaxy. Methods. We perform a rigorous weighted least-squares adjustment of individual observations, spread over more than a century, to determine mean positions and proper motions. The stellar content of PPMX is taken from GSC 1.2 supplemented by catalogues like ARIHIP, PPM and Tycho-2 at the bright end. All observations have been weighted according to their individual accuracy. The catalogue has been screened towards rejecting false entries in the various source catalogues. Results. PPM-Extended (PPMX) is a catalogue of 18 088 919 stars containing astrometric and photometric information. Its limiting magnitude is about 15.2 in the GSC photometric system. PPMX consists of three parts: a) a survey complete down to $R_{\rm U} = 12.8$ in the magnitude system of UCAC2; b) additional stars of high-precision proper motions, and c) all other stars from GSC 1.2 identified in 2MASS. The typical accuracy of the proper motions is 2 mas/y for 66 percent of the survey stars (a) and the high-precision stars (b), and about 10 mas/y for all other stars. PPMX contains photometric information from ASCC-2.5 and 2MASS.

Subfields: Aerospace Engineering, Astronomy and Astrophysics, Computational Mechanics

View Paper: https://www.semanticscholar.org/paper/cd2ccac2ba9ed5a37c95cc8dedeb417a52f9546e

How researchers see this paper

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In Aerospace Engineering

1. Eric Mamajek
2. Kelle Cruz
3. K. Luhman

In Astronomy and Astrophysics

1. Eric Mamajek
2. K. Luhman
3. M. Pecaut
4. P. R. Allen
5. Kelle Cruz
6. L. Hillenbrand
7. T. Mazeh
8. Joel D. Hartman

In Computational Mechanics

1. Eric Mamajek
2. P. R. Allen
3. Kelle Cruz
4. T. Mazeh
5. K. Luhman
6. E. Schilbach
7. M. Pecaut
8. T. Cantat-Gaudin

Citations in the corpus

• A PHOTOMETRIC VARIABILITY SURVEY OF FIELD K AND M DWARF STARS WITH HATNet (2009, methodology): “Proper motion measurements are taken from the PPM-Extended catalog (PPMX; Röser et al. 2008) which provides proper motions with precisions ranging from 2 mas yr−1 to 10 mas yr−1 for 18 million stars over the full sky down to a limiting magnitude of V ∼ 15.2.”
• AN INFRARED/X-RAY SURVEY FOR NEW MEMBERS OF THE TAURUS STAR-FORMING REGION (2009, methodology): “The available proper motion measurements for HBC 354 and HBC 355, which are separated by 6′′, also are inconsistent with membership in Taurus (Zacharias et al. 2004a; Ducourant et al. 2005; Röser et al. 2008).”
• THE PPMXL CATALOG OF POSITIONS AND PROPER MOTIONS ON THE ICRS. COMBINING USNO-B1.0 AND THE TWO MICRON ALL SKY SURVEY (2MASS) (2010, background): “Röser et al. (2008) published the PPMX catalog of positions and proper motions of 18 million stars with limiting magnitude around 15 in a red band.”
• The star formation history and accretion-disc fraction among the K-type members of the Scorpius–Centaurus OB association (2016, methodology): “At the time we performed our sample selection, the PPMX catalog the most complete homogeneous proper motion catalog with absolute proper motions (i.e., on the International Celestial Reference System, or ICRS; Röser et al. 2008).”