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photoD with Rubin ’s Data Preview 1: First stellar photometric distances and faint blue star deficits

Publication ,  Journal Article
Palaversa, L; Donev, E; Ivezić, Ž; Mrakovčić, K; Caplar, N; Jurićc, M; Jurkić, T; Campos, S; DeLucchi, M; Jones, D; Malanchev, K; Malz, AI ...
Published in: Astronomy & Astrophysics
March 2026

. We investigate the utility of ’s Data Preview 1 (DP1) for estimating stellar number density profiles across the Milky Way halo. . We used stellar broad-band near-UV to near-IR photometry released in ’s DP1 to estimate distance and metallicity for blue main sequence stars brighter than = 24 in three ~1.1 sq. deg. fields at southern Galactic latitudes. . Compared to TRILEGAL simulations of the Galaxy’s stellar content, we found a likely deficit of blue main sequence turn-off stars with 22 < < 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/ profile assumed in TRILEGAL simulations. . 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 ’s Legacy Survey of Space and Time (LSST).

Duke Scholars

Published In

Astronomy &amp; Astrophysics

DOI

EISSN

1432-0746

ISSN

0004-6361

Publication Date

March 2026

Volume

707

Start / End Page

A333 / A333

Publisher

EDP Sciences

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
 

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Palaversa, L., Donev, E., Ivezić, Ž., Mrakovčić, K., Caplar, N., Jurićc, M., … Willman, B. (2026). photoD with Rubin ’s Data Preview 1: First stellar photometric distances and faint blue star deficits. Astronomy &amp; Astrophysics, 707, A333–A333. https://doi.org/10.1051/0004-6361/202557219
Palaversa, L., E. Donev, Ž. Ivezić, K. Mrakovčić, N. Caplar, M. Jurićc, T. Jurkić, et al. “photoD with Rubin ’s Data Preview 1: First stellar photometric distances and faint blue star deficits.” Astronomy &amp; Astrophysics 707 (March 2026): A333–A333. https://doi.org/10.1051/0004-6361/202557219.
Palaversa L, Donev E, Ivezić Ž, Mrakovčić K, Caplar N, Jurićc M, et al. photoD with Rubin ’s Data Preview 1: First stellar photometric distances and faint blue star deficits. Astronomy &amp; Astrophysics. 2026 Mar;707:A333–A333.
Palaversa, L., et al. “photoD with Rubin ’s Data Preview 1: First stellar photometric distances and faint blue star deficits.” Astronomy &amp; Astrophysics, vol. 707, EDP Sciences, Mar. 2026, pp. A333–A333. Crossref, doi:10.1051/0004-6361/202557219.
Palaversa L, Donev E, Ivezić Ž, Mrakovčić K, Caplar N, Jurićc M, Jurkić T, Campos S, DeLucchi M, Jones D, Malanchev K, Malz AI, McGuire S, Abel B, Girardi L, Pastorelli G, Trabucchi M, Zaggia S, Acosta E, Adair CL, Andrew J, Aubourg É, Bauer AE, Beebe W, Bellm EC, Blum RD, Booth MT, Boucaud A, Branton D, Burke DL, Calabrese D, Carlin JL, Chiang H-F, Choi Y, Connolly AJ, Dagoret-Campagne S, Daly PN, Daruich F, Daubard G, Dennihy E, Drass H, Eiger O, Eisner AM, Guy LP, Hoblitt J, Ingraham P, Jammes F, Jannuzi BT, Jee MJ, Jenness T, Jones RL, Juramy-Gilles C, Kahn SM, Kang Y, Kannawadi A, Kelvin LS, Kotov IV, Kovács G, Kurita NR, Lange T, Laporte D, Lazarte JC, Liang S, Lopez M, Lust NB, Lutfi M, Lynn O, Mainetti G, Menanteau F, Miller M, Moniez M, Nourbakhsh E, Park HY, Peterson JR, Plante R, Plazas Malagón AA, Porter MN, Reil KA, Riot VJ, Roodman A, Rykoff ES, Schindler RH, Sebag J, Sedaghat N, Shaw RA, Shugart A, Siruno KB, Smith JA, Swinbank JD, Thayer JG, Thomas S, Tighe R, Tucker DL, Turri M, Urbach EK, Van Klaveren B, van Reeven W, Waters CZ, Willman B. photoD with Rubin ’s Data Preview 1: First stellar photometric distances and faint blue star deficits. Astronomy &amp; Astrophysics. EDP Sciences; 2026 Mar;707:A333–A333.
Journal cover image

Published In

Astronomy &amp; Astrophysics

DOI

EISSN

1432-0746

ISSN

0004-6361

Publication Date

March 2026

Volume

707

Start / End Page

A333 / A333

Publisher

EDP Sciences

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences