The Astrophysical Journal (Jan 2024)
Mapping the Milky Way in 5D with 170 Million Stars
- Joshua S. Speagle,
- Catherine Zucker,
- Ana Bonaca,
- Phillip A. Cargile,
- Benjamin D. Johnson,
- Angus Beane,
- Charlie Conroy,
- Douglas P. Finkbeiner,
- Gregory M. Green,
- Harshil M. Kamdar,
- Rohan Naidu,
- Hans-Walter Rix,
- Edward F. Schlafly,
- Aaron Dotter,
- Gwendolyn Eadie,
- Daniel J. Eisenstein,
- Alyssa A. Goodman,
- Jiwon Jesse Han,
- Andrew K. Saydjari,
- Yuan-Sen Ting,
- Ioana A. Zelko
Affiliations
- Joshua S. Speagle
- ORCiD
- Department of Statistical Sciences, University of Toronto , Toronto, ON M5S 3G3, Canada ; [email protected]; David A. Dunlap Department of Astronomy & Astrophysics, University of Toronto , Toronto, ON M5S 3H4, Canada; Dunlap Institute for Astronomy & Astrophysics, University of Toronto , Toronto, ON M5S 3H4, Canada; Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Catherine Zucker
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA; Space Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USA
- Ana Bonaca
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA; Carnegie Observatories , 813 Santa Barbara St., Pasadena, CA 91101, USA
- Phillip A. Cargile
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Benjamin D. Johnson
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Angus Beane
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Charlie Conroy
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Douglas P. Finkbeiner
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA; Department of Physics, Harvard University , 17 Oxford St., Cambridge, MA 02138, USA
- Gregory M. Green
- ORCiD
- Max-Planck-Institut für Astronomie , Königstuhl 17, D-69117 Heidelberg, Germany
- Harshil M. Kamdar
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Rohan Naidu
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Hans-Walter Rix
- ORCiD
- Max-Planck-Institut für Astronomie , Königstuhl 17, D-69117 Heidelberg, Germany
- Edward F. Schlafly
- ORCiD
- Lawrence Livermore National Laboratory , 7000 East Ave., Livermore, CA 94550, USA
- Aaron Dotter
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Gwendolyn Eadie
- ORCiD
- Department of Statistical Sciences, University of Toronto , Toronto, ON M5S 3G3, Canada ; [email protected]; David A. Dunlap Department of Astronomy & Astrophysics, University of Toronto , Toronto, ON M5S 3H4, Canada
- Daniel J. Eisenstein
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Alyssa A. Goodman
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA; Radcliffe Institute for Advanced Study, Harvard University , 10 Garden St., Cambridge, MA 02138, USA
- Jiwon Jesse Han
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- Andrew K. Saydjari
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA; Department of Physics, Harvard University , 17 Oxford St., Cambridge, MA 02138, USA
- Yuan-Sen Ting
- ORCiD
- Institute for Advanced Study , Princeton, NJ 08540, USA; Department of Astrophysical Sciences, Princeton University , Princeton, NJ 08544, USA; Observatories of the Carnegie Institution of Washington , 813 Santa Barbara St., Pasadena, CA 91101, USA; Research School of Astronomy and Astrophysics, Australian National University , Cotter Road, ACT 2611, Canberra, Australia; Research School of Computer Science, Australian National University , Acton, ACT 2601, Australia
- Ioana A. Zelko
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
- DOI
- https://doi.org/10.3847/1538-4357/ad2b62
- Journal volume & issue
-
Vol. 970,
no. 2
p. 121
Abstract
We present Augustus , a catalog of distance, extinction, and stellar parameter estimates for 170 million stars from 14 mag 10° drawing on a combination of optical to near-infrared photometry from Pan-STARRS, 2MASS, UKIDSS, and unWISE along with parallax measurements from Gaia DR2 and 3D dust extinction maps. After applying quality cuts, we find 125 million objects have “high-quality” posteriors with statistical distance uncertainties of ≲10% for objects with well-constrained stellar types. This is a substantial improvement over the distance estimates derived from Gaia parallaxes alone and in line with the recent results from Anders et al. We find the fits are able to reproduce the dereddened Gaia color–magnitude diagram accurately, which serves as a useful consistency check of our results. We show that we are able to detect large, kinematically coherent substructures in our data clearly relative to the input priors, including the Monoceros Ring and the Sagittarius Stream, attesting to the quality of the catalog. Our results are publicly available at doi:10.7910/DVN/WYMSXV. An accompanying interactive visualization can be found at http://allsky.s3-website.us-east-2.amazonaws.com .
Keywords
