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6 results on '"S. Samuroff"'

1. Weak Gravitational Lensing around Low Surface Brightness Galaxies in the DES Year 3 Data

Author

N. Chicoine, J. Prat, G. Zacharegkas, C. Chang, D. Tanoglidis, A. Drlica-Wagner, D. Anbajagane, S. Adhikari, A. Amon, R. H. Wechsler, A. Alarcon, K. Bechtol, M. R. Becker, G. M. Bernstein, A. Campos, A. Carnero Rosell, M. Carrasco Kind, R. Cawthon, R. Chen, A. Choi, J. Cordero, C. Davis, J. DeRose, S. Dodelson, C. Doux, K. Eckert, J. Elvin-Poole, S. Everett, A. Ferté, M. Gatti, G. Giannini, D. Gruen, R. A. Gruendl, I. Harrison, K. Herner, M. Jarvis, P. -F. Leget, N. MacCrann, J. McCullough, J. Myles, A. Navarro-Alsina, S. Pandey, M. Raveri, R. P. Rollins, A. Roodman, A. J. Ross, E. S. Rykoff, C. Sánchez, L. F. Secco, I. Sevilla-Noarbe, E. Sheldon, T. Shin, M. A. Troxel, I. Tutusaus, T. N. Varga, B. Yanny, B. Yin, J. Zuntz, M. Aguena, O. Alves, D. Bacon, D. Brooks, J. Carretero, F. J. Castander, C. Conselice, S. Desai, J. De Vicente, P. Doel, I. Ferrero, B. Flaugher, J. Frieman, J. García-Bellido, E. Gaztanaga, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, K. Kuehn, S. Lee, C. Lidman, M. Lima, J. L. Marshall, J. Mena-Fernández, R. Miquel, J. Muir, R. L. C. Ogando, A. Palmese, M. E. S. Pereira, A. Pieres, A. A. Plazas Malagón, A. Porredon, A. R. Walker, S. Samuroff, E. Sanchez, D. Sanchez Cid, M. Smith, E. Suchyta, M. E. C. Swanson, G. Tarle, C. To, D. L. Tucker, V. Vikram, N. Weaverdyck, and P. Wiseman

Subjects
Astronomy, QB1-991, Astrophysics, QB460-466
Abstract

We present galaxy-galaxy lensing measurements using a sample of low surface brightness galaxies (LSBGs) drawn from the Dark Energy Survey Year 3 (Y3) data as lenses. LSBGs are diffuse galaxies with a surface brightness dimmer than the ambient night sky. These dark-matter-dominated objects are intriguing due to potentially unusual formation channels that lead to their diffuse stellar component. Given the faintness of LSBGs, using standard observational techniques to characterize their total masses proves challenging. Weak gravitational lensing, which is less sensitive to the stellar component of galaxies, could be a promising avenue to estimate the masses of LSBGs. Our LSBG sample consists of 23,790 galaxies separated into red and blue color types at $g-i\ge 0.60$ and $g-i< 0.60$, respectively. Combined with the DES Y3 shear catalog, we measure the tangential shear around these LSBGs and find signal-to-noise ratios of 6.67 for the red sample, 2.17 for the blue sample, and 5.30 for the full sample. We use the clustering redshifts method to obtain redshift distributions for the red and blue LSBG samples. Assuming all red LSBGs are satellites, we fit a simple model to the measurements and estimate the host halo mass of these LSBGs to be $\log(M_{\rm host}/M_{\odot}) = 12.98 ^{+0.10}_{-0.11}$. We place a 95% upper bound on the subhalo mass at $\log(M_{\rm sub}/M_{\odot})

Published
2024
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2. DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys

Author

Dark Energy Survey, Kilo-Degree Survey Collaboration, T. M. C. Abbott, M. Aguena, A. Alarcon, O. Alves, A. Amon, F. Andrade-Oliveira, M. Asgari, S. Avila, D. Bacon, K. Bechtol, M. R. Becker, G. M. Bernstein, E. Bertin, M. Bilicki, J. Blazek, S. Bocquet, D. Brooks, P. Burger, D. L. Burke, H. Camacho, A. Campos, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, F. J. Castander, R. Cawthon, C. Chang, R. Chen, A. Choi, C. Conselice, J. Cordero, M. Crocce, L. N. da Costa, M. E. da Silva Pereira, R. Dalal, C. Davis, J. T. A. deJong, J. DeRose, S. Desai, H. T. Diehl, S. Dodelson, P. Doel, C. Doux, A. Drlica-Wagner, A. Dvornik, K. Eckert, T. F. Eifler, J. Elvin-Poole, S. Everett, X. Fang, I. Ferrero, A. Ferté, B. Flaugher, O. Friedrich, J. Frieman, J. García-Bellido, M. Gatti, G. Giannini, B. Giblin, D. Gruen, R. A. Gruendl, G. Gutierrez, I. Harrison, W. G. Hartley, K. Herner, C. Heymans, H. Hildebrandt, S. R. Hinton, H. Hoekstra, D. L. Hollowood, K. Honscheid, H. Huang, E. M. Huff, D. Huterer, D. J. James, M. Jarvis, N. Jeffrey, T. Jeltema, B. Joachimi, S. Joudaki, A. Kannawadi, E. Krause, K. Kuehn, K. Kuijken, N. Kuropatkin, O. Lahav, P. -F. Leget, P. Lemos, S. Li, X. Li, A. R. Liddle, M. Lima, C. -A Lin, H. Lin, N. MacCrann, C. Mahony, J. L. Marshall, J. McCullough, J. Mena-Fernández, F. Menanteau, R. Miquel, J. J. Mohr, J. Muir, J. Myles, N. Napolitano, A. Navarro-Alsina, R. L. C. Ogando, A. Palmese, S. Pandey, Y. Park, M. Paterno, J. A. Peacock, D. Petravick, A. Pieres, A. A. Plazas Malagón, A. Porredon, J. Prat, M. Radovich, M. Raveri, R. Reischke, N. C. Robertson, R. P. Rollins, A. K. Romer, A. Roodman, E. S. Rykoff, S. Samuroff, C. Sánchez, E. Sanchez, J. Sanchez, P. Schneider, L. F. Secco, I. Sevilla-Noarbe, H.-Y. Shan, E. Sheldon, T. Shin, C. Sifón, M. Smith, M. Soares-Santos, B. Stölzner, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, C. To, M. A. Troxel, T. Tröster, I. Tutusaus, J. L. van den Busch, T. N. Varga, A. R. Walker, N. Weaverdyck, R. H. Wechsler, J. Weller, P. Wiseman, A. H. Wright, B. Yanny, B. Yin, M. Yoon, Y. Zhang, and J. Zuntz

Subjects
Astronomy, QB1-991, Astrophysics, QB460-466
Abstract

We present a joint cosmic shear analysis of the Dark Energy Survey (DES Y3) and the Kilo-Degree Survey (KiDS-1000) in a collaborative effort between the two survey teams. We find consistent cosmological parameter constraints between DES Y3 and KiDS-1000 which, when combined in a joint-survey analysis, constrain the parameter $S_8 = \sigma_8 \sqrt{\Omega_{\rm m}/0.3}$ with a mean value of $0.790^{+0.018}_{-0.014}$. The mean marginal is lower than the maximum a posteriori estimate, $S_8=0.801$, owing to skewness in the marginal distribution and projection effects in the multi-dimensional parameter space. Our results are consistent with $S_8$ constraints from observations of the cosmic microwave background by Planck, with agreement at the $1.7\sigma$ level. We use a Hybrid analysis pipeline, defined from a mock survey study quantifying the impact of the different analysis choices originally adopted by each survey team. We review intrinsic alignment models, baryon feedback mitigation strategies, priors, samplers and models of the non-linear matter power spectrum. Supplementary information: you can download the chains here or create your own chains with CosmoSIS here.

Published
2023
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3. DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys

Author

T.M.C. Abbott, M. Aguena, A. Alarcon, O. Alves, A. Amon, F. Andrade-Oliveira, M. Asgari, S. Avila, D. Bacon, K. Bechtol, M. R. Becker, G. M. Bernstein, E. Bertin, M. Bilicki, J. Blazek, S. Bocquet, D. Brooks, P. Burger, D. L. Burke, H. Camacho, A. Campos, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, F. J. Castander, R. Cawthon, C. Chang, R. Chen, A. Choi, C. Conselice, J. Cordero, M. Crocce, L. N. da Costa, M. E. da Silva Pereira, R. Dalal, C. Davis, J. T. A. de Jong, J. DeRose, S. Desai, H. T. Diehl, S. Dodelson, P. Doel, C. Doux, A. Drlica-Wagner, A. Dvornik, K. Eckert, T. F. Eifler, J. Elvin-Poole, S. Everett, X. Fang, I. Ferrero, A. Ferté, B. Flaugher, O. Friedrich, J. Frieman, J. García-Bellido, M. Gatti, G. Giannini, B. Giblin, D. Gruen, R. A. Gruendl, G. Gutierrez, I. Harrison, W. G. Hartley, K. Herner, C. Heymans, H. Hildebrandt, S. R. Hinton, H. Hoekstra, D. L. Hollowood, K. Honscheid, H. Huang, E. M. Huff, D. Huterer, D. J. James, M. Jarvis, N. Jeffrey, T. Jeltema, B. Joachimi, S. Joudaki, A. Kannawadi, E. Krause, K. Kuehn, K. Kuijken, N. Kuropatkin, O. Lahav, P.-F. Leget, P. Lemos, S.-S. Li, X. Li, A. R. Liddle, M. Lima, C.-A. Lin, H. Lin, N. MacCrann, C. Mahony, J. L. Marshall, J. McCullough, J. Mena-Fernández, F. Menanteau, R. Miquel, J. J. Mohr, J. Muir, J. Myles, N. Napolitano, A. Navarro-Alsina, R. L. C. Ogando, A. Palmese, S. Pandey, Y. Park, M. Paterno, J. A. Peacock, D. Petravick, A. Pieres, A. A. Plazas Malagón, A. Porredon, J. Prat, M. Radovich, M. Raveri, R. Reischke, N. C. Robertson, R. P. Rollins, A. K. Romer, A. Roodman, E. S. Rykoff, S. Samuroff, C. Sánchez, E. Sanchez, J. Sanchez, P. Schneider, L. F. Secco, I. Sevilla-Noarbe, H.-Y. Shan, E. Sheldon, T. Shin, C. Sifón, M. Smith, M. Soares-Santos, B. Stölzner, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, C. To, M. A. Troxel, T. Tröster, I. Tutusaus, J. L. van den Busch, T. N. Varga, A. R. Walker, N. Weaverdyck, R. H. Wechsler, J. Weller, P. Wiseman, A. H. Wright, B. Yanny, B. Yin, M. Yoon, Y. Zhang, and J. Zuntz

Subjects
Astronomy, QB1-991, Astrophysics, QB460-466
Published
2023
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4. Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances, Weak Lensing, and Galaxy Correlations.

Author

To C, Krause E, Rozo E, Wu H, Gruen D, Wechsler RH, Eifler TF, Rykoff ES, Costanzi M, Becker MR, Bernstein GM, Blazek J, Bocquet S, Bridle SL, Cawthon R, Choi A, Crocce M, Davis C, DeRose J, Drlica-Wagner A, Elvin-Poole J, Fang X, Farahi A, Friedrich O, Gatti M, Gaztanaga E, Giannantonio T, Hartley WG, Hoyle B, Jarvis M, MacCrann N, McClintock T, Miranda V, Pereira MES, Park Y, Porredon A, Prat J, Rau MM, Ross AJ, Samuroff S, Sánchez C, Sevilla-Noarbe I, Sheldon E, Troxel MA, Varga TN, Vielzeuf P, Zhang Y, Zuntz J, Abbott TMC, Aguena M, Amon A, Annis J, Avila S, Bertin E, Bhargava S, Brooks D, Burke DL, Carnero Rosell A, Carrasco Kind M, Carretero J, Chang C, Conselice C, da Costa LN, Davis TM, Desai S, Diehl HT, Dietrich JP, Everett S, Evrard AE, Ferrero I, Flaugher B, Fosalba P, Frieman J, García-Bellido J, Gruendl RA, Gutierrez G, Hinton SR, Hollowood DL, Honscheid K, Huterer D, James DJ, Jeltema T, Kron R, Kuehn K, Kuropatkin N, Lima M, Maia MAG, Marshall JL, Menanteau F, Miquel R, Morgan R, Muir J, Myles J, Palmese A, Paz-Chinchón F, Plazas AA, Romer AK, Roodman A, Sanchez E, Santiago B, Scarpine V, Serrano S, Smith M, Suchyta E, Swanson MEC, Tarle G, Thomas D, Tucker DL, Weller J, Wester W, and Wilkinson RD

Abstract

We present the first joint analysis of cluster abundances and auto or cross-correlations of three cosmic tracer fields: galaxy density, weak gravitational lensing shear, and cluster density split by optical richness. From a joint analysis (4×2pt+N) of cluster abundances, three cluster cross-correlations, and the auto correlations of the galaxy density measured from the first year data of the Dark Energy Survey, we obtain Ω&#95;{m}=0.305&#95;{-0.038}^{+0.055} and σ&#95;{8}=0.783&#95;{-0.054}^{+0.064}. This result is consistent with constraints from the DES-Y1 galaxy clustering and weak lensing two-point correlation functions for the flat νΛCDM model. Consequently, we combine cluster abundances and all two-point correlations from across all three cosmic tracer fields (6×2pt+N) and find improved constraints on cosmological parameters as well as on the cluster observable-mass scaling relation. This analysis is an important advance in both optical cluster cosmology and multiprobe analyses of upcoming wide imaging surveys.

Published
2021
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5. Detection of Cross-Correlation between Gravitational Lensing and γ Rays.

Author

Ammazzalorso S, Gruen D, Regis M, Camera S, Ando S, Fornengo N, Bechtol K, Bridle SL, Choi A, Eifler TF, Gatti M, MacCrann N, Omori Y, Samuroff S, Sheldon E, Troxel MA, Zuntz J, Carrasco Kind M, Annis J, Avila S, Bertin E, Brooks D, Burke DL, Carnero Rosell A, Carretero J, Castander FJ, Costanzi M, da Costa LN, De Vicente J, Desai S, Diehl HT, Dietrich JP, Doel P, Everett S, Flaugher B, Fosalba P, García-Bellido J, Gaztanaga E, Gerdes DW, Giannantonio T, Goldstein DA, Gruendl RA, Gutierrez G, Hollowood DL, Honscheid K, James DJ, Jarvis M, Jeltema T, Kent S, Kuropatkin N, Lahav O, Li TS, Lima M, Maia MAG, Marshall JL, Melchior P, Menanteau F, Miquel R, Ogando RLC, Palmese A, Plazas AA, Romer AK, Roodman A, Rykoff ES, Sánchez C, Sanchez E, Scarpine V, Serrano S, Sevilla-Noarbe I, Smith M, Soares-Santos M, Sobreira F, Suchyta E, Swanson MEC, Tarle G, Thomas D, Vikram V, and Zhang Y

Abstract

In recent years, many γ-ray sources have been identified, yet the unresolved component hosts valuable information on the faintest emission. In order to extract it, a cross-correlation with gravitational tracers of matter in the Universe has been shown to be a promising tool. We report here the first identification of a cross-correlation signal between γ rays and the distribution of mass in the Universe probed by weak gravitational lensing. We use data from the Dark Energy Survey Y1 weak lensing data and the Fermi Large Area Telescope 9-yr γ-ray data, obtaining a signal-to-noise ratio of 5.3. The signal is mostly localized at small angular scales and high γ-ray energies, with a hint of correlation at extended separation. Blazar emission is likely the origin of the small-scale effect. We investigate implications of the large-scale component in terms of astrophysical sources and particle dark matter emission.

Published
2020
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6. Cosmological Constraints from Multiple Probes in the Dark Energy Survey.

Author

Abbott TMC, Alarcon A, Allam S, Andersen P, Andrade-Oliveira F, Annis J, Asorey J, Avila S, Bacon D, Banik N, Bassett BA, Baxter E, Bechtol K, Becker MR, Bernstein GM, Bertin E, Blazek J, Bridle SL, Brooks D, Brout D, Burke DL, Calcino J, Camacho H, Campos A, Carnero Rosell A, Carollo D, Carrasco Kind M, Carretero J, Castander FJ, Cawthon R, Challis P, Chan KC, Chang C, Childress M, Crocce M, Cunha CE, D'Andrea CB, da Costa LN, Davis C, Davis TM, De Vicente J, DePoy DL, DeRose J, Desai S, Diehl HT, Dietrich JP, Dodelson S, Doel P, Drlica-Wagner A, Eifler TF, Elvin-Poole J, Estrada J, Evrard AE, Fernandez E, Flaugher B, Foley RJ, Fosalba P, Frieman J, Galbany L, García-Bellido J, Gatti M, Gaztanaga E, Gerdes DW, Giannantonio T, Glazebrook K, Goldstein DA, Gruen D, Gruendl RA, Gschwend J, Gutierrez G, Hartley WG, Hinton SR, Hollowood DL, Honscheid K, Hoormann JK, Hoyle B, Huterer D, Jain B, James DJ, Jarvis M, Jeltema T, Kasai E, Kent S, Kessler R, Kim AG, Kokron N, Krause E, Kron R, Kuehn K, Kuropatkin N, Lahav O, Lasker J, Lemos P, Lewis GF, Li TS, Lidman C, Lima M, Lin H, Macaulay E, MacCrann N, Maia MAG, March M, Marriner J, Marshall JL, Martini P, McMahon RG, Melchior P, Menanteau F, Miquel R, Mohr JJ, Morganson E, Muir J, Möller A, Neilsen E, Nichol RC, Nord B, Ogando RLC, Palmese A, Pan YC, Peiris HV, Percival WJ, Plazas AA, Porredon A, Prat J, Romer AK, Roodman A, Rosenfeld R, Ross AJ, Rykoff ES, Samuroff S, Sánchez C, Sanchez E, Scarpine V, Schindler R, Schubnell M, Scolnic D, Secco LF, Serrano S, Sevilla-Noarbe I, Sharp R, Sheldon E, Smith M, Soares-Santos M, Sobreira F, Sommer NE, Swann E, Swanson MEC, Tarle G, Thomas D, Thomas RC, Troxel MA, Tucker BE, Uddin SA, Vielzeuf P, Walker AR, Wang M, Weaverdyck N, Wechsler RH, Weller J, Yanny B, Zhang B, Zhang Y, and Zuntz J

Abstract

The combination of multiple observational probes has long been advocated as a powerful technique to constrain cosmological parameters, in particular dark energy. The Dark Energy Survey has measured 207 spectroscopically confirmed type Ia supernova light curves, the baryon acoustic oscillation feature, weak gravitational lensing, and galaxy clustering. Here we present combined results from these probes, deriving constraints on the equation of state, w, of dark energy and its energy density in the Universe. Independently of other experiments, such as those that measure the cosmic microwave background, the probes from this single photometric survey rule out a Universe with no dark energy, finding w=-0.80&#95;{-0.11}^{+0.09}. The geometry is shown to be consistent with a spatially flat Universe, and we obtain a constraint on the baryon density of Ω&#95;{b}=0.069&#95;{-0.012}^{+0.009} that is independent of early Universe measurements. These results demonstrate the potential power of large multiprobe photometric surveys and pave the way for order of magnitude advances in our constraints on properties of dark energy and cosmology over the next decade.

Published
2019
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