Database of Ultracool Parallaxes

 

This page houses a complete inventory of all ultracool dwarfs (late-M, L, T, and Y dwarfs) with measured parallaxes.  The data presented in the files below are based on the compilation in Dupuy & Liu (2012) and are continually updated as new parallaxes become available in the literature.  The data tables housed here are intended to be a comprehensive collection of all useful data for ultracool dwarfs with direct distance measurements, including:


  1. Astrometry (R.A., Dec., parallax, and proper motion)

  2. MKO photometry (YJHKL’M’), with YJHK data synthesized from any available spectra if no published MKO measurements

  3. 2MASS photometry (JHKs), with data synthesized from any available spectra when not detected in 2MASS

  4. Spitzer/IRAC photometry (channels 1, 2, 3, and 4)

  5. WISE All-Sky Catalog photometry, including upper limits and data quality flags

  6. SDSS photometry from DR7 onward

  7. Spectral types (optical and near-IR)

  8. Flags for unusual objects (e.g., low gravity, YMG members, low metallicity, etc.)

  9. High-angular resolution imaging information

  10. Companion information


If you use the data compiled here, please remember to:

  1. (1)cite the original sources (all references provided in the tables below);

  2. (2)acknowledge this compilation by citing Dupuy & Liu (2012) and the Database of Ultracool Parallaxes maintained by Trent Dupuy.

Data files

(411 objects tabulated)


Excel table containing all data                 vlm-plx-excel.xlsx

FITS table containing all data                  vlm-plx-all.fits

ASCII table containing all data                 vlm-plx-all.txt

ASCII table of parallax solutions only          vlm-plx-astrom.txt

ASCII table of MKO and 2MASS photometry only    vlm-plx-mko+2mass.txt

ASCII table of IRAC and WISE photometry only    vlm-plx-irac+wise.txt

ASCII table of SDSS photometry only             vlm-plx-sdss.txt

ASCII table containing reference key            vlm-plx-refs.txt

ASCII table of MKO and 2MASS weighted averages  vlm-plx-niravg.txt

ASCII table of IRAC and WISE weighted averages  vlm-plx-miravg.txt

explanation of all files                        README.txt


IDL code for parsing spectral type strings      sptstr2num.pro

IDL code for creating spectral type strings     sptnum2str.pro

IDL code that computes polynomial relations     tjd_sptabsmag.pro

IDLASTRO routine modified to read >100 columns  readcol.pro


tarball of all data files: vlm-plx-data.tar.gz

This page maintained by Trent Dupuy.  Please send comments or corrections to tdupuy@cfa.harvard.edu.  Last updated 2013-09-09.  Update history:

  1. 2012-01-13: First posting based on Dupuy & Liu (2012, ApJ, revised arxiv:1201.2465v1)

  2. 2012-06-09: Updated with final version of Dupuy & Liu (2012, ApJS, accepted arxiv:1201.2465v2) and also includes all parallaxes from Faherty et al. (2012)

  3. 2013-09-09: Updated with numerous parallax results from Shkolnik et al. (2012), Marsh et al. (2013), and Dupuy & Kraus (2013), along with several single-parallax papers (Faherty et al., Tinney et al., Beamin et al., Kirkpatrick et al., Luhman et al.).  Also includes new stellar companions with parallaxes (Vigan et al., Rameau et al., Janson et al., Gomes et al., Gauza et al., Wright et al., Luhman et al., Burningham et al.).  Added Ross 248 (M5.5 at 3 pc) and updated CFBDSIR J1458+10AB properties.

Figures

MKO J-band absolute magnitude vs. J-H color for normal field dwarfs: cmd-JH-J.ps

All permutations of color-magnitude diagrams are available in a tarball: vlm-plx-cmd.tar.gz

WISE band 1 absolute magnitude vs. W1-W2 color for normal field dwarfs: cmd-W1W2-W1.ps

MKO J-band absolute magnitude vs. spectral type for normal field dwarfs:

spt-Jabs.ps



All absolute magnitude vs. spectral type diagrams are available in a tarball:

vlm-plx-sptabsmag.tar.gz