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; Leo 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

doi:10.3847/1538-4365/acdcfd

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. BrooksJames S. Bullock, Charlie Conroy, M. C. Cooper, Julianne J. Dalcanton, Aaron L. Dotter, Tobias K. Fritz, Christopher T. Garling, Mario Gennaro, Karoline M. Gilbert, Leo 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

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

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 1/4105 in luminosity, 1/4104 in distance, and 1/4105 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 1/41.5 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 1/40.05 mag too blue compared to M92 F090W - F150W data. Our CMDs show detector-dependent color offsets ranging from 1/40.02 mag in F090W - F150W to 1/40.1 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.

Original language	English (US)
Article number	15
Journal	Astrophysical Journal, Supplement Series
Volume	268
Issue number	1
DOIs	https://doi.org/10.3847/1538-4365/acdcfd
State	Published - Sep 1 2023

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© 2023. The Author(s). Published by the American Astronomical Society.

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Weisz, D. R., McQuinn, K. B. W., Savino, A., Kallivayalil, N., Anderson, J., Boyer, M. L., Correnti, M., Geha, M. C., Dolphin, A. E., Sandstrom, K. M., Cole, A. A., Williams, B. F., Skillman, E. D., Cohen, R. E., Newman, M. J. B., Beaton, R., Bressan, A., Bolatto, A., Boylan-Kolchin, M., ... Wetzel, A. (2023). The JWST Resolved Stellar Populations Early Release Science Program. II. Survey Overview. Astrophysical Journal, Supplement Series, 268(1), Article 15. https://doi.org/10.3847/1538-4365/acdcfd

Weisz, DR, McQuinn, KBW, Savino, A, Kallivayalil, N, Anderson, J, Boyer, ML, Correnti, M, Geha, MC, Dolphin, AE, Sandstrom, KM, Cole, AA, Williams, BF, Skillman, ED, Cohen, RE, Newman, MJB, Beaton, R, Bressan, A, Bolatto, A, Boylan-Kolchin, M, Brooks, AM, Bullock, JS, Conroy, C, Cooper, MC, Dalcanton, JJ, Dotter, AL, Fritz, TK, Garling, CT, Gennaro, M, Gilbert, KM, Girardi, L, Johnson, BD, Johnson, LC, Kalirai, JS, Kirby, EN, Lang, D, Marigo, P, Richstein, H, Schlafly, EF, Schmidt, J, Tollerud, EJ, Warfield, JT & Wetzel, A 2023, 'The JWST Resolved Stellar Populations Early Release Science Program. II. Survey Overview', Astrophysical Journal, Supplement Series, vol. 268, no. 1, 15. https://doi.org/10.3847/1538-4365/acdcfd

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title = "The JWST Resolved Stellar Populations Early Release Science Program. II. Survey Overview",

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 1/4105 in luminosity, 1/4104 in distance, and 1/4105 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 1/41.5 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 1/40.05 mag too blue compared to M92 F090W - F150W data. Our CMDs show detector-dependent color offsets ranging from 1/40.02 mag in F090W - F150W to 1/40.1 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.",

author = "Weisz, {Daniel R.} and McQuinn, {Kristen B.W.} and Alessandro Savino and Nitya Kallivayalil and Jay Anderson and Boyer, {Martha L.} and Matteo Correnti and Geha, {Marla C.} and Dolphin, {Andrew E.} and Sandstrom, {Karin M.} and Cole, {Andrew A.} and Williams, {Benjamin F.} and Skillman, {Evan D.} and Cohen, {Roger E.} and Newman, {Max J.B.} and Rachael Beaton and Alessandro Bressan and Alberto Bolatto and Michael Boylan-Kolchin and Brooks, {Alyson M.} and Bullock, {James S.} and Charlie Conroy and Cooper, {M. C.} and Dalcanton, {Julianne J.} and Dotter, {Aaron L.} and Fritz, {Tobias K.} and Garling, {Christopher T.} and Mario Gennaro and Gilbert, {Karoline M.} and Leo Girardi and Johnson, {Benjamin D.} and Johnson, {L. Clifton} and Kalirai, {Jason S.} and Kirby, {Evan N.} and Dustin Lang and Paola Marigo and Hannah Richstein and Schlafly, {Edward F.} and Judy Schmidt and Tollerud, {Erik J.} and Warfield, {Jack T.} and Andrew Wetzel",

note = "Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",

year = "2023",

month = sep,

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doi = "10.3847/1538-4365/acdcfd",

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T1 - The JWST Resolved Stellar Populations Early Release Science Program. II. Survey Overview

AU - Weisz, Daniel R.

AU - McQuinn, Kristen B.W.

AU - Savino, Alessandro

AU - Kallivayalil, Nitya

AU - Anderson, Jay

AU - Boyer, Martha L.

AU - Correnti, Matteo

AU - Geha, Marla C.

AU - Dolphin, Andrew E.

AU - Sandstrom, Karin M.

AU - Cole, Andrew A.

AU - Williams, Benjamin F.

AU - Skillman, Evan D.

AU - Cohen, Roger E.

AU - Newman, Max J.B.

AU - Beaton, Rachael

AU - Bressan, Alessandro

AU - Bolatto, Alberto

AU - Boylan-Kolchin, Michael

AU - Brooks, Alyson M.

AU - Bullock, James S.

AU - Conroy, Charlie

AU - Cooper, M. C.

AU - Dalcanton, Julianne J.

AU - Dotter, Aaron L.

AU - Fritz, Tobias K.

AU - Garling, Christopher T.

AU - Gennaro, Mario

AU - Gilbert, Karoline M.

AU - Girardi, Leo

AU - Johnson, Benjamin D.

AU - Johnson, L. Clifton

AU - Kalirai, Jason S.

AU - Kirby, Evan N.

AU - Lang, Dustin

AU - Marigo, Paola

AU - Richstein, Hannah

AU - Schlafly, Edward F.

AU - Schmidt, Judy

AU - Tollerud, Erik J.

AU - Warfield, Jack T.

AU - Wetzel, Andrew

PY - 2023/9/1

Y1 - 2023/9/1

N2 - 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 1/4105 in luminosity, 1/4104 in distance, and 1/4105 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 1/41.5 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 1/40.05 mag too blue compared to M92 F090W - F150W data. Our CMDs show detector-dependent color offsets ranging from 1/40.02 mag in F090W - F150W to 1/40.1 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.

AB - 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 1/4105 in luminosity, 1/4104 in distance, and 1/4105 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 1/41.5 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 1/40.05 mag too blue compared to M92 F090W - F150W data. Our CMDs show detector-dependent color offsets ranging from 1/40.02 mag in F090W - F150W to 1/40.1 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.

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JO - Astrophysical Journal, Supplement Series

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ER -

The JWST Resolved Stellar Populations Early Release Science Program. II. Survey Overview

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