The Astrophysical Journal Supplement Series (Jan 2023)
The JWST Resolved Stellar Populations Early Release Science Program. II. Survey Overview
- Daniel R. Weisz,
- Kristen B. W. McQuinn,
- Alessandro Savino,
- Nitya Kallivayalil,
- Jay Anderson,
- Martha L. Boyer,
- Matteo Correnti,
- Marla C. Geha,
- Andrew E. Dolphin,
- Karin M. Sandstrom,
- Andrew A. Cole,
- Benjamin F. Williams,
- Evan D. Skillman,
- Roger E. Cohen,
- Max J. B. Newman,
- Rachael Beaton,
- Alessandro Bressan,
- Alberto Bolatto,
- Michael Boylan-Kolchin,
- Alyson M. Brooks,
- James S. Bullock,
- Charlie Conroy,
- M. C. Cooper,
- Julianne J. Dalcanton,
- Aaron L. Dotter,
- Tobias K. Fritz,
- Christopher T. Garling,
- Mario Gennaro,
- Karoline M. Gilbert,
- Léo Girardi,
- Benjamin D. Johnson,
- L. Clifton Johnson,
- Jason S. Kalirai,
- Evan N. Kirby,
- Dustin Lang,
- Paola Marigo,
- Hannah Richstein,
- Edward F. Schlafly,
- Judy Schmidt,
- Erik J. Tollerud,
- Jack T. Warfield,
- Andrew Wetzel
Affiliations
- Daniel R. Weisz
- ORCiD
- Department of Astronomy, University of California , Berkeley, CA 94720, USA ; [email protected]
- Kristen B. W. McQuinn
- ORCiD
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854, USA
- Alessandro Savino
- ORCiD
- Department of Astronomy, University of California , Berkeley, CA 94720, USA ; [email protected]
- Nitya Kallivayalil
- ORCiD
- Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22904, USA
- Jay Anderson
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Martha L. Boyer
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Matteo Correnti
- ORCiD
- INAF Osservatorio Astronomico di Roma , Via Frascati 33, I-00078 Monteporzio Catone, Rome, Italy; ASI-Space Science Data Center , Via del Politecnico, I-00133 Rome, Italy
- Marla C. Geha
- ORCiD
- Department of Astronomy, Yale University , New Haven, CT 06520, USA
- Andrew E. Dolphin
- ORCiD
- Raytheon Technologies , 1151 E. Hermans Road, Tucson, AZ 85756, USA; Steward Observatory, University of Arizona , 933 N. Cherry Avenue, Tucson, AZ 85719, USA
- Karin M. Sandstrom
- ORCiD
- Center for Astrophysics and Space Sciences, Department of Physics, University of California San Diego , 9500 Gilman Drive, La Jolla, CA 92093, USA
- Andrew A. Cole
- ORCiD
- School of Natural Sciences, University of Tasmania , Private Bag 37, Hobart, Tasmania 7001, Australia
- Benjamin F. Williams
- ORCiD
- Department of Astronomy, University of Washington , P. O. Box 351580, U.W., Seattle, WA 98195-1580, USA
- Evan D. Skillman
- ORCiD
- University of Minnesota , Minnesota Institute for Astrophysics, School of Physics and Astronomy, 116 Church Street SE, Minneapolis, MN 55455, USA
- Roger E. Cohen
- ORCiD
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854, USA
- Max J. B. Newman
- ORCiD
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854, USA
- Rachael Beaton
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544, USA; The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
- Alessandro Bressan
- ORCiD
- SISSA , Via Bonomea 265, I-34136 Trieste, Italy
- Alberto Bolatto
- ORCiD
- Department of Astronomy, University of Maryland , College Park, MD 20742, USA; Joint Space-Science Institute, University of Maryland , College Park, MD 20742, USA
- Michael Boylan-Kolchin
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway, Stop C1400, Austin, TX 78712-1205, USA
- Alyson M. Brooks
- ORCiD
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854, USA; Center for Computational Astrophysics, Flatiron Institute , 162 Fifth Avenue, New York, NY 10010, USA
- James S. Bullock
- ORCiD
- Department of Physics and Astronomy, University of California , Irvine, CA 92697 USA
- Charlie Conroy
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , Cambridge, MA 02138, USA
- M. C. Cooper
- ORCiD
- Department of Physics and Astronomy, University of California , Irvine, CA 92697 USA
- Julianne J. Dalcanton
- ORCiD
- Department of Astronomy, University of Washington , P. O. Box 351580, U.W., Seattle, WA 98195-1580, USA; Center for Computational Astrophysics, Flatiron Institute , 162 Fifth Avenue, New York, NY 10010, USA
- Aaron L. Dotter
- ORCiD
- Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory , Hanover, NH 03755, USA
- Tobias K. Fritz
- ORCiD
- Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22904, USA
- Christopher T. Garling
- ORCiD
- Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22904, USA
- Mario Gennaro
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; The William H. Miller III Department of Physics & Astronomy, Bloomberg Center for Physics and Astronomy, Johns Hopkins University , 3400 N. Charles Street, Baltimore, MD 21218, USA
- Karoline M. Gilbert
- ORCiD
- The William H. Miller III Department of Physics & Astronomy, Bloomberg Center for Physics and Astronomy, Johns Hopkins University , 3400 N. Charles Street, Baltimore, MD 21218, USA
- Léo Girardi
- ORCiD
- Padova Astronomical Observatory , Vicolo dell’Osservatorio 5, Padova, Italy
- Benjamin D. Johnson
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , Cambridge, MA 02138, USA
- L. Clifton Johnson
- ORCiD
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University , 1800 Sherman Avenue, Evanston, IL 60201, USA
- Jason S. Kalirai
- ORCiD
- John Hopkins Applied Physics Laboratory , 11100 Johns Hopkins Road, Laurel, MD 20723, USA
- Evan N. Kirby
- ORCiD
- Department of Physics, University of Notre Dame , Notre Dame, IN 46556, USA
- Dustin Lang
- ORCiD
- Perimeter Institute for Theoretical Physics , Waterloo, ON N2L 2Y5, Canada
- Paola Marigo
- ORCiD
- Department of Physics and Astronomy G. Galilei, University of Padova , Vicolo dell'Osservatorio 3, I-35122 Padova, Italy
- Hannah Richstein
- ORCiD
- Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22904, USA
- Edward F. Schlafly
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Judy Schmidt
- ORCiD
- 2817 Rudge Place, Modesto, CA 95355, USA
- Erik J. Tollerud
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Jack T. Warfield
- ORCiD
- Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22904, USA
- Andrew Wetzel
- ORCiD
- Department of Physics and Astronomy, University of California , Davis, CA 95616, USA
- DOI
- https://doi.org/10.3847/1538-4365/acdcfd
- Journal volume & issue
-
Vol. 268,
no. 1
p. 15
Abstract
We present the JWST Resolved Stellar Populations Early Release Science (ERS) program. We obtained 27.5 hr of NIRCam and NIRISS imaging of three targets in the Local Group (Milky Way globular cluster M92, ultrafaint dwarf galaxy Draco II , and star-forming dwarf galaxy WLM), which span factors of ∼10 ^5 in luminosity, ∼10 ^4 in distance, and ∼10 ^5 in surface brightness. We describe the survey strategy, scientific and technical goals, implementation details, present select NIRCam color–magnitude diagrams (CMDs), and validate the NIRCam exposure time calculator (ETC). Our CMDs are among the deepest in existence for each class of target. They touch the theoretical hydrogen-burning limit in M92 (<0.08 M _⊙ ; M _F090W ∼ +13.6), include the lowest-mass stars observed outside the Milky Way in Draco II (0.09 M _⊙ ; M _F090W ∼ +12.1), and reach ∼1.5 mag below the oldest main-sequence turnoff in WLM ( M _F090W ∼ +4.6). The PARSEC stellar models provide a good qualitative match to the NIRCam CMDs, though they are ∼0.05 mag too blue compared to M92 F090W − F150W data. Our CMDs show detector-dependent color offsets ranging from ∼0.02 mag in F090W – F150W to ∼0.1 mag in F277W – F444W; these appear to be due to differences in the zero-point calibrations among the detectors. The NIRCam ETC (v2.0) matches the signal-to-noise ratios based on photon noise in uncrowded fields, but the ETC may not be accurate in more crowded fields, similar to what is known for the Hubble Space Telescope. We release the point-source photometry package DOLPHOT, optimized for NIRCam and NIRISS, for the community.
Keywords
- Stellar photometry
- Local Group
- Stellar populations
- Hertzsprung Russell diagram
- James Webb Space Telescope
