DOE OSTI · 3017449
photoD with Rubin ’s Data Preview 1: First stellar photometric distances and faint blue star deficits
Abstract
Aims. We investigate the utility of Rubin’s Data Preview 1 (DP1) for estimating stellar number density profiles across the Milky Way halo. Methods. We used stellar broad-band near-UV to near-IR ugrizy photometry released in Rubin’s DP1 to estimate distance and metallicity for blue main sequence stars brighter than r = 24 in three ~1.1 sq. deg. fields at southern Galactic latitudes. Results. Compared to TRILEGAL simulations of the Galaxy’s stellar content, we found a likely deficit of blue main sequence turn-off stars with 22 < r < 24. We interpreted this discrepancy as a signature of a steeper halo number density profile at galactocentric distances 10–50 kpc than the canonical ~1/r 3 profile assumed in TRILEGAL simulations. Conclusions. This interpretation is consistent with earlier suggestions based on observations of more luminous, but much less numerous, evolved stellar populations, along with a few pencil beam surveys of blue main sequence stars in the northern sky. These results bode well for the future Galactic halo exploration with Rubin’s Legacy Survey of Space and Time (LSST).
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Palaversa, L. [Ruđer Bošković Institute] (ORCID:0000000337100331), Donev, E. [XV. Gymnasium (MIOC)] (ORCID:0009000588783015), Ivezić, Ž. [Vera C. Rubin Observatory Project Office; University of Washington, Dept. of Astronomy] (ORCID:0000000152502633), Mrakovčić, K. [Faculty of Physics, University of Rijeka] (ORCID:0009000981543827), Caplar, N. [University of Washington, Dept. of Astronomy], Jurićc, M. [Institute for Data-intensive Research in Astrophysics and Cosmology, University of Washington], Jurkić, T. [Faculty of Physics, University of Rijeka] (ORCID:0000000249932939), Campos, S. [McWilliams Center for Cosmology & Astrophysics, Department of Physics, Carnegie Mellon University] (ORCID:0009000798709032), DeLucchi, M. [McWilliams Center for Cosmology & Astrophysics, Department of Physics, Carnegie Mellon University] (ORCID:0000000210742900), Jones, D. [Institute for Data-intensive Research in Astrophysics and Cosmology, University of Washington] (ORCID:000900062411723X), Malanchev, K. [McWilliams Center for Cosmology & Astrophysics, Department of Physics, Carnegie Mellon University] (ORCID:0000000171797406), Malz, A. I. [McWilliams Center for Cosmology & Astrophysics, Department of Physics, Carnegie Mellon University], McGuire, S. [McWilliams Center for Cosmology & Astrophysics, Department of Physics, Carnegie Mellon University], Abel, B. [Olympic College] (ORCID:0000000184183083), Girardi, L. [INAF – Osservatorio Astronomico di Padova] (ORCID:0000000263013269), Pastorelli, G. [INAF – Osservatorio Astronomico di Padova; Department of Physics and Astronomy G. Galilei, University of Padova] (ORCID:0000000293007409), Trabucchi, M. [Department of Physics and Astronomy G. Galilei, University of Padova] (ORCID:0000000214292388), Zaggia, S. [INAF – Osservatorio Astronomico di Padova] (ORCID:000000016081379X), Acosta, E. [Vera C. Rubin Observatory Project Office], Adair, C. L. [SLAC National Accelerator Laboratory], Andrew, J. [Vera C. Rubin Observatory Project Office], Aubourg, É. [Université Paris Cité, CNRS/IN2P3, CEA, APC], Bauer, A. E. [Yerkes Observatory] (ORCID:0000000190376981), Beebe, W. [Institute for Data-intensive Research in Astrophysics and Cosmology, University of Washington] (ORCID:0009000317918707), Bellm, E. C. [University of Washington, Dept. of Astronomy] (ORCID:0000000180185348), Blum, R. D. [Vera C. Rubin Observatory/NSF NOIRLab] (ORCID:0000000286224237), Booth, M. T. [Vera C. Rubin Observatory Project Office], Boucaud, A. [Université Paris Cité, CNRS/IN2P3, APC] (ORCID:0000000173872633), Branton, D. [Institute for Data-intensive Research in Astrophysics and Cosmology, University of Washington], Burke, D. L. [Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory], Calabrese, D. [Vera C. Rubin Observatory Project Office], Carlin, J. L. [Vera C. Rubin Observatory Project Office] (ORCID:0000000239369628), Chiang, H.-F. [SLAC National Accelerator Laboratory], Choi, Y. [NSF NOIRLab] (ORCID:0000000316801884), Connolly, A. J. [Institute for Data-intensive Research in Astrophysics and Cosmology, University of Washington] (ORCID:0000000155768189), Dagoret-Campagne, S. [Université Paris-Saclay, CNRS/IN2P3, IJCLab] (ORCID:0000000311317030), Daly, P. N. [Vera C. Rubin Observatory Project Office], Daruich, F. [Vera C. Rubin Observatory], Daubard, G. [Sorbonne Université, Université Paris Cité, CNRS/IN2P3, LPNHE] (ORCID:0009000443515968), Dennihy, E. [Vera C. Rubin Observatory Project Office], Drass, H. [Vera C. Rubin Observatory], Eiger, O. [SLAC National Accelerator Laboratory; Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory] (ORCID:000000032933391X), Eisner, A. M. [Santa Cruz Institute for Particle Physics and Physics Department, University of California–Santa Cruz], Guy, L. P. [Vera C. Rubin Observatory] (ORCID:0000000308008755), Hoblitt, J. [Vera C. Rubin Observatory Project Office] (ORCID:0000000252925879), Ingraham, P. [Steward Observatory, The University of Arizona] (ORCID:0000000337158138), Jammes, F. [Université Clermont Auvergne, CNRS/IN2P3, LPCA], Jannuzi, B. T. [University of Arizona, Department of Astronomy and Steward Observatory], Jee, M. J. [Department of Astronomy, Yonsei University; Physics Department, University of California] (ORCID:0000000257513697), Jenness, T. [Vera C. Rubin Observatory Project Office] (ORCID:000000015982167X), Jones, R. L. [University of Washington, Dept. of Astronomy], Juramy-Gilles, C. [Sorbonne Université, Université Paris Cité, CNRS/IN2P3, LPNHE] (ORCID:0000000231459258), Kahn, S. M. [Physics Department, University of California] (ORCID:0000000348339137), Kang, Y. [Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory; Vera C. Rubin Observatory], Kannawadi, A. [Department of Physics, Duke University; Department of Astrophysical Sciences, Princeton University] (ORCID:0000000187836529), Kelvin, L. S. [Department of Astrophysical Sciences, Princeton University] (ORCID:0000000193954759), Kotov, I. V. [Brookhaven National Laboratory] (ORCID:0000000328919310), Kovács, G. [Institute for Data-intensive Research in Astrophysics and Cosmology, University of Washington] (ORCID:000000031779775X), Kurita, N. R. [SLAC National Accelerator Laboratory], Lange, T. [SLAC National Accelerator Laboratory] (ORCID:0009000805964489), Laporte, D. [Sorbonne Université, Université Paris Cité, CNRS/IN2P3, LPNHE], Lazarte, J. C. [SLAC National Accelerator Laboratory], Liang, S. [SLAC National Accelerator Laboratory] (ORCID:0000000267301997), Lopez, M. [SLAC National Accelerator Laboratory] (ORCID:0009000760752609), Lust, N. B. [Department of Astrophysical Sciences, Princeton University], Lutfi, M. [Vera C. Rubin Observatory Project Office], Lynn, O. [McWilliams Center for Cosmology & Astrophysics, Department of Physics, Carnegie Mellon University] (ORCID:000000015028146X), Mainetti, G. [CNRS/IN2P3, CC-IN2P3] (ORCID:0000000323842377), Menanteau, F. [NCSA, University of Illinois at Urbana-Champaign], Miller, M. [NSF NOIRLab], Moniez, M. [Université Paris-Saclay, CNRS/IN2P3, IJCLab] (ORCID:0000000187166561), Nourbakhsh, E. [Department of Astrophysical Sciences, Princeton University] (ORCID:0000000338274691), Park, H. Y. [Department of Physics, Duke University] (ORCID:0000000272952743), Peterson, J. R. [Department of Physics and Astronomy, Purdue University], Plante, R. [National Institute of Standards and Technology, Material Measurement Laboratory, Office of Data and Informatics] (ORCID:0000000292794877), Plazas Malagón, A. A. [SLAC National Accelerator Laboratory; Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory], Porter, M. N. [Florida Institute of Technology] (ORCID:0000000192793770), Reil, K. A. [SLAC National Accelerator Laboratory], Riot, V. J. [Lawrence Livermore National Laboratory] (ORCID:0000000182393079), Roodman, A. [Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory] (ORCID:0000000153263486), Rykoff, E. S. [Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory], Schindler, R. H. [Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory], Sebag, J. [Vera C. Rubin Observatory] (ORCID:0000000193480290), Sedaghat, N. [University of Washington, Dept. of Astronomy] (ORCID:0000000347342019), Shaw, R. A. [Space Telescope Science Institute] (ORCID:0000000340585202), Shugart, A. [Vera C. Rubin Observatory] (ORCID:0009000067787168), Siruno, K. B. [Vera C. Rubin Observatory], Smith, J. A. [Austin Peay State University] (ORCID:0000000262614601), Swinbank, J. D. [ASTRON; Department of Astrophysical Sciences, Princeton University] (ORCID:0000000194451846), Thayer, J. G. [SLAC National Accelerator Laboratory], Thomas, S. [Vera C. Rubin Observatory Project Office], Tighe, R. [Vera C. Rubin Observatory], Tucker, D. L. [Fermi National Accelerator Laboratory] (ORCID:0000000172115729), Turri, M. [SLAC National Accelerator Laboratory], Urbach, E. K. [Department of Physics, Harvard University] (ORCID:0000000232052484), Van Klaveren, B. [SLAC National Accelerator Laboratory], van Reeven, W. [Vera C. Rubin Observatory] (ORCID:0000000214319245), Waters, C. Z. [Department of Astrophysical Sciences, Princeton University] (ORCID:0000000319894879), Willman, B. [LSST Discovery Alliance] (ORCID:0000000328929906). 2026-03-19. photoD with Rubin ’s Data Preview 1: First stellar photometric distances and faint blue star deficits. https://doi.org/10.1051/0004-6361%2F202557219
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