One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field

C. E. Barbosa; C. E. Barbosa; D. Zaritsky; R. Donnerstein; H. Zhang; A. Dey; C. Mendes De Oliveira; L. Sampedro; A. Molino; M. V. Costa-Duarte; P. Coelho; A. Cortesi; F. R. Herpich; J. A. Hernandez-Jimenez; J. A. Hernandez-Jimenez; T. Santos-Silva; E. Pereira; A. Werle; A. Werle; R. A. Overzier; R. A. Overzier; R. Cid Fernandes; A. V.Smith Castelli; A. V.Smith Castelli; T. Ribeiro; T. Ribeiro; W. Schoenell; W. Schoenell; A. Kanaan

doi:10.3847/1538-4365/ab7660

One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field

C. E. Barbosa, C. E. Barbosa, D. Zaritsky, R. Donnerstein, H. Zhang, A. Dey, C. Mendes De Oliveira, L. Sampedro, A. Molino, M. V. Costa-Duarte, P. Coelho, A. Cortesi, F. R. Herpich, J. A. Hernandez-Jimenez, J. A. Hernandez-Jimenez, T. Santos-Silva, E. Pereira, A. Werle, A. Werle, R. A. OverzierR. A. Overzier, R. Cid Fernandes, A. V.Smith Castelli, A. V.Smith Castelli, T. Ribeiro, T. Ribeiro, W. Schoenell, W. Schoenell, A. Kanaan

Astronomy

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37 Scopus citations

Abstract

We present the first systematic study of the stellar populations of ultra-diffuse galaxies (UDGs) in the field, integrating the large area search and characterization of UDGs by the SMUDGes survey with the twelve-band optical photometry of the S-PLUS survey. Based on Bayesian modeling of the optical colors of UDGs, we determine the ages, metallicities, and stellar masses of 100 UDGs distributed in an area of ∼330 deg2 in the Stripe 82 region. We find that the stellar masses and metallicities of field UDGs are similar to those observed in clusters and follow the trends previously defined in studies of dwarf and giant galaxies. However, field UDGs have younger luminosity-weighted ages than do UDGs in clusters. We interpret this result to mean that field UDGs have more extended star formation histories, including some that continue to form stars at low levels to the present time. Finally, we examine stellar population scaling relations that show that UDGs are, as a population, similar to other low surface brightness galaxies.

Original language	English (US)
Article number	46
Journal	Astrophysical Journal, Supplement Series
Volume	247
Issue number	2
DOIs	https://doi.org/10.3847/1538-4365/ab7660
State	Published - Apr 2020

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4365/ab7660

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Barbosa, C. E., Barbosa, C. E., Zaritsky, D., Donnerstein, R., Zhang, H., Dey, A., De Oliveira, C. M., Sampedro, L., Molino, A., Costa-Duarte, M. V., Coelho, P., Cortesi, A., Herpich, F. R., Hernandez-Jimenez, J. A., Hernandez-Jimenez, J. A., Santos-Silva, T., Pereira, E., Werle, A., Werle, A., ... Kanaan, A. (2020). One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field. Astrophysical Journal, Supplement Series, 247(2), Article 46. https://doi.org/10.3847/1538-4365/ab7660

Barbosa, CE, Barbosa, CE, Zaritsky, D, Donnerstein, R, Zhang, H, Dey, A, De Oliveira, CM, Sampedro, L, Molino, A, Costa-Duarte, MV, Coelho, P, Cortesi, A, Herpich, FR, Hernandez-Jimenez, JA, Hernandez-Jimenez, JA, Santos-Silva, T, Pereira, E, Werle, A, Werle, A, Overzier, RA, Overzier, RA, Cid Fernandes, R, Castelli, AVS, Castelli, AVS, Ribeiro, T, Ribeiro, T, Schoenell, W, Schoenell, W & Kanaan, A 2020, 'One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field', Astrophysical Journal, Supplement Series, vol. 247, no. 2, 46. https://doi.org/10.3847/1538-4365/ab7660

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abstract = "We present the first systematic study of the stellar populations of ultra-diffuse galaxies (UDGs) in the field, integrating the large area search and characterization of UDGs by the SMUDGes survey with the twelve-band optical photometry of the S-PLUS survey. Based on Bayesian modeling of the optical colors of UDGs, we determine the ages, metallicities, and stellar masses of 100 UDGs distributed in an area of ∼330 deg2 in the Stripe 82 region. We find that the stellar masses and metallicities of field UDGs are similar to those observed in clusters and follow the trends previously defined in studies of dwarf and giant galaxies. However, field UDGs have younger luminosity-weighted ages than do UDGs in clusters. We interpret this result to mean that field UDGs have more extended star formation histories, including some that continue to form stars at low levels to the present time. Finally, we examine stellar population scaling relations that show that UDGs are, as a population, similar to other low surface brightness galaxies.",

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T2 - Ultra-diffuse Galaxies Flourish in the Field

AU - Barbosa, C. E.

AU - Zaritsky, D.

AU - Donnerstein, R.

AU - Zhang, H.

AU - Dey, A.

AU - De Oliveira, C. Mendes

AU - Sampedro, L.

AU - Molino, A.

AU - Costa-Duarte, M. V.

AU - Coelho, P.

AU - Cortesi, A.

AU - Herpich, F. R.

AU - Hernandez-Jimenez, J. A.

AU - Santos-Silva, T.

AU - Pereira, E.

AU - Werle, A.

AU - Overzier, R. A.

AU - Cid Fernandes, R.

AU - Castelli, A. V.Smith

AU - Ribeiro, T.

AU - Schoenell, W.

AU - Kanaan, A.

PY - 2020/4

Y1 - 2020/4

N2 - We present the first systematic study of the stellar populations of ultra-diffuse galaxies (UDGs) in the field, integrating the large area search and characterization of UDGs by the SMUDGes survey with the twelve-band optical photometry of the S-PLUS survey. Based on Bayesian modeling of the optical colors of UDGs, we determine the ages, metallicities, and stellar masses of 100 UDGs distributed in an area of ∼330 deg2 in the Stripe 82 region. We find that the stellar masses and metallicities of field UDGs are similar to those observed in clusters and follow the trends previously defined in studies of dwarf and giant galaxies. However, field UDGs have younger luminosity-weighted ages than do UDGs in clusters. We interpret this result to mean that field UDGs have more extended star formation histories, including some that continue to form stars at low levels to the present time. Finally, we examine stellar population scaling relations that show that UDGs are, as a population, similar to other low surface brightness galaxies.

AB - We present the first systematic study of the stellar populations of ultra-diffuse galaxies (UDGs) in the field, integrating the large area search and characterization of UDGs by the SMUDGes survey with the twelve-band optical photometry of the S-PLUS survey. Based on Bayesian modeling of the optical colors of UDGs, we determine the ages, metallicities, and stellar masses of 100 UDGs distributed in an area of ∼330 deg2 in the Stripe 82 region. We find that the stellar masses and metallicities of field UDGs are similar to those observed in clusters and follow the trends previously defined in studies of dwarf and giant galaxies. However, field UDGs have younger luminosity-weighted ages than do UDGs in clusters. We interpret this result to mean that field UDGs have more extended star formation histories, including some that continue to form stars at low levels to the present time. Finally, we examine stellar population scaling relations that show that UDGs are, as a population, similar to other low surface brightness galaxies.

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One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field

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Opt. photometry of SMUDGes ultra-diffuse galaxies

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One Hundred SMUDGes in S-PLUS: Ultra-diffuse Galaxies Flourish in the Field

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Opt. photometry of SMUDGes ultra-diffuse galaxies

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