Search Results - "Wojtak, R"

A New Measurement of the Hubble Constant and Matter Content of the Universe Using Extragalactic Background Light γ-Ray Attenuation by Domínguez, A., Wojtak, R., Finke, J., Ajello, M., Helgason, K., Prada, F., Desai, A., Paliya, V., Marcotulli, L., Hartmann, D. H.

“…The Hubble constant H0 and matter density m of the universe are measured using the latest γ-ray attenuation results from Fermi-LAT and Cerenkov telescopes…”
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Galaxy Cluster Mass Reconstruction Project – IV. Understanding the effects of imperfect membership on cluster mass estimation by Wojtak, R, Old, L, Mamon, G A, Pearce, F R, de Carvalho, R, Sifón, C, Gray, M E, Skibba, R A, Croton, D, Bamford, S, Gifford, D, von der Linden, A, Muñoz-Cuartas, J C, Müller, V, Pearson, R J, Rozo, E, Rykoff, E, Saro, A, Sepp, T, Tempel, E

“…The primary difficulty in measuring dynamical masses of galaxy clusters from galaxy data lies in the separation between true cluster members from interloping…”
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Galaxy cluster mass reconstruction project – I. Methods and first results on galaxy-based techniques by Old, L., Skibba, R. A., Pearce, F. R., Croton, D., Muldrew, S. I., Muñoz-Cuartas, J. C., Gifford, D., Gray, M. E., der Linden, A. von, Mamon, G. A., Merrifield, M. R., Müller, V., Pearson, R. J., Ponman, T. J., Saro, A., Sepp, T., Sifón, C., Tempel, E., Tundo, E., Wang, Y. O., Wojtak, R.

“…This paper is the first in a series in which we perform an extensive comparison of various galaxy-based cluster mass estimation techniques that utilize the…”
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Galaxy Cluster Mass Reconstruction Project – II. Quantifying scatter and bias using contrasting mock catalogues by Old, L., Wojtak, R., Mamon, G. A., Skibba, R. A., Pearce, F. R., Croton, D., Bamford, S., Behroozi, P., de Carvalho, R., Muñoz-Cuartas, J. C., Gifford, D., Gray, M. E., der Linden, A. von, Merrifield, M. R., Muldrew, S. I., Müller, V., Pearson, R. J., Ponman, T. J., Rozo, E., Rykoff, E., Saro, A., Sepp, T., Sifón, C., Tempel, E.

“…This paper is the second in a series in which we perform an extensive comparison of various galaxy-based cluster mass estimation techniques that utilize the…”
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A new derivation of the Hubble constant from γ-ray attenuation using improved optical depths for the Fermi and CTA era by Domínguez, A, Østergaard Kirkeberg, P, Wojtak, R, Saldana-Lopez, A, Desai, A, Primack, J R, Finke, J, Ajello, M, Pérez-González, P G, Paliya, V S, Hartmann, D

“…ABSTRACT We present γ-ray optical-depth calculations from a recently published extragalactic background light (EBL) model built from multiwavelength galaxy…”
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LensWatch. I. Resolved HST Observations and Constraints on the Strongly Lensed Type Ia Supernova 2022qmx (“SN Zwicky”) by Pierel, J. D. R., Arendse, N., Ertl, S., Huang, X., Moustakas, L. A., Schuldt, S., Shajib, A. J., Shu, Y., Birrer, S., Bronikowski, M., Hjorth, J., Suyu, S. H., Agarwal, S., Agnello, A., Bolton, A. S., Chakrabarti, S., Cold, C., Courbin, F., Della Costa, J. M., Dhawan, S., Engesser, M., Fox, Ori D., Gall, C., Gomez, S., Goobar, A., Jha, S. W., Jimenez, C., Johansson, J., Larison, C., Li, G., Marques-Chaves, R., Mao, S., Mazzali, P. A., Perez-Fournon, I., Petrushevska, T., Poidevin, F., Rest, A., Sheu, W., Shirley, R., Silver, E., Storfer, C., Strolger, L. G., Treu, T., Wojtak, R., Zenati, Y.

“…Abstract Supernovae (SNe) that have been multiply imaged by gravitational lensing are rare and powerful probes for cosmology. Each detection is an opportunity…”
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Galaxy Cluster Mass Reconstruction Project – III. The impact of dynamical substructure on cluster mass estimates by Old, L, Wojtak, R, Pearce, F R, Gray, M E, Mamon, G A, Sifón, C, Tempel, E, Biviano, A, Yee, H K C, de Carvalho, R, Müller, V, Sepp, T, Skibba, R A, Croton, D, Bamford, S P, Power, C, von der Linden, A, Saro, A

“…Abstract With the advent of wide-field cosmological surveys, we are approaching samples of hundreds of thousands of galaxy clusters. While such large numbers…”
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A fast-rising tidal disruption event from a candidate intermediate-mass black hole by Angus, C. R., Baldassare, V. F., Mockler, B., Foley, R. J., Ramirez-Ruiz, E., Raimundo, S. I., French, K. D., Auchettl, K., Pfister, H., Gall, C., Hjorth, J., Drout, M. R., Alexander, K. D., Dimitriadis, G., Hung, T., Jones, D. O., Rest, A., Siebert, M. R., Taggart, K., Terreran, G., Tinyanont, S., Carroll, C. M., DeMarchi, L., Earl, N., Gagliano, A., Izzo, L., Villar, V. A., Zenati, Y., Arendse, N., Cold, C., de Boer, T. J. L., Chambers, K. C., Coulter, D. A., Khetan, N., Lin, C. C., Magnier, E. A., Rojas-Bravo, C., Wainscoat, R. J., Wojtak, R.

“…Massive black holes (BHs) at the centres of massive galaxies are ubiquitous. The population of BHs within dwarf galaxies, on the other hand, is not yet known…”
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Ursa Major II - reproducing the observed properties through tidal disruption by Smith, R., Fellhauer, M., Candlish, G. N., Wojtak, R., Farias, J. P., Blaña, M.

“…Recent deep photometry of the dwarf spheroidal Ursa Major II's morphology, and spectroscopy of individual stars, have provided a number of new constraints on…”
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Mass distribution in nearby Abell clusters by Łokas, E. L., Wojtak, R., Gottlöber, S., Mamon, G. A., Prada, F.

“…We study the mass distribution in six nearby (z < 0.06) relaxed Abell clusters of galaxies A0262, A0496, A1060, A2199, A3158 and A3558. Given the dominance of…”
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The complex velocity distribution of galaxies in Abell 1689: implications for mass modelling by Łokas, E. L., Prada, F., Wojtak, R., Moles, M., Gottlöber, S.

“…The Abell 1689 galaxy cluster has recently become a subject of intensive study. Thanks to its intermediate redshift (z= 0.183), its mass distribution can be…”
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Why does the Jeans Swindle work? by Falco, M., Hansen, S. H., Wojtak, R., Mamon, G. A.

“…When measuring the mass profile of any given cosmological structure through internal kinematics, the distant background density is always ignored. This trick…”
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The Young Supernova Experiment: Survey Goals, Overview, and Operations by Jones, D. O., Foley, R. J., Narayan, G., Hjorth, J., Huber, M. E., Aleo, P. D., Alexander, K. D., Angus, C. R., Auchettl, K., Baldassare, V. F., Bruun, S. H., Chambers, K. C., Chatterjee, D., Coppejans, D. L., Coulter, D. A., DeMarchi, L., Dimitriadis, G., Drout, M. R., Engel, A., French, K. D., Gagliano, A., Gall, C., Hung, T., Izzo, L., Jacobson-Galán, W. V., Kilpatrick, C. D., Korhonen, H., Margutti, R., Raimundo, S. I., Ramirez-Ruiz, E., Rest, A., Rojas-Bravo, C., Siebert, M. R., Smartt, S. J., Smith, K. W., Terreran, G., Wang, Q., Wojtak, R., Agnello, A., Ansari, Z., Arendse, N., Baldeschi, A., Blanchard, P. K., Brethauer, D., Bright, J. S., Brown, J. S., Boer, T. J. L. de, Dodd, S. A., Fairlamb, J. R., Grillo, C., Hajela, A., Hede, C., Kolborg, A. N., Law-Smith, J. A. P., Lin, C.-C., Magnier, E. A., Malanchev, K., Matthews, D., Mockler, B., Muthukrishna, D., Pan, Y.-C., Pfister, H., Ramanah, D. K., Rest, S., Sarangi, A., Schrøder, S. L., Stauffer, C., Stroh, M. C., Taggart, K. L., Tinyanont, S., Wainscoat, R. J.

“…Time-domain science has undergone a revolution over the past decade, with tens of thousands of new supernovae (SNe) discovered each year. However, several…”
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Galaxy Cluster Mass Reconstruction Project – III. The impact of dynamical substructure on cluster mass estimates by Old, L., Wojtak, R., Pearce, F. R., Gray, M. E., Mamon, G. A., Sifon, C., Tempel, E., Biviano, A., Yee, H. K. C., de Carvalho, R., Muller, V., Sepp, T., Skibba, R. A., Croton, D., Bamford, S. P., Power, C., von der Linden, A., Saro, A.

“…With the advent of wide-field cosmological surveys, we are approaching samples of hundreds of thousands of galaxy clusters. While such large numbers will help…”
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Dark matter annihilation in Draco: New considerations of the expected gamma flux by Sánchez-Conde, M. A., Prada, F., Łokas, E. L., Gómez, M. E., Wojtak, R., Moles, M.

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Equation of state for the Universe from similarity symmetries by Szydłowski, Marek, Godłowski, Włodzimierz, Wojtak, Radosław

“…In this paper we proposed to use the group of analysis of symmetries of the dynamical system to describe the evolution of the Universe. This method is used in…”
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Mass distribution in nearby Abell clusters by Łokas, E. L., Wojtak, R., Gottlöber, S., Mamon, G. A., Prada, F.

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A new derivation of the Hubble constant from $\gamma$-ray attenuation using improved optical depths for the Fermi and CTA era by Domínguez, A, Kirkeberg, P. Østergaard, Wojtak, R, Saldana-Lopez, A, Desai, A, Primack, J. R, Finke, J, Ajello, M, Pérez-González, P. G, Paliya, V. S, Hartmann, D

“…We present $\gamma$-ray optical-depth calculations from a recently published extragalactic background light (EBL) model built from multiwavelength galaxy data…”
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The complex velocity distribution of galaxies in Abell 1689: implications for mass modelling by Łokas, E. L., Prada, F., Wojtak, R., Moles, M., Gottlöber, S.

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LensWatch: I. Resolved HST Observations and Constraints on the Strongly-Lensed Type Ia Supernova 2022qmx ("SN Zwicky") by Pierel, J. D. R, Arendse, N, Ertl, S, Huang, X, Moustakas, L. A, Schuldt, S, Shajib, A. J, Shu, Y, Birrer, S, Bronikowski, M, Hjorth, J, Suyu, S. H, Agarwal, S, Agnello, A, Bolton, A. S, Chakrabarti, S, Cold, C, Courbin, F, Della Costa, J. M, Dhawan, S, Engesser, M, Fox, O. D, Gall, C, Gomez, S, Goobar, A, Jimenez, C, Johansson, J, Li, G, Marques-Chaves, R, Mao, S, Mazzali, P. A, Perez-Fournon, I, Petrushevska, T, Poidevin, F, Rest, A, Sheu, W, Shirley, R, Silver, E, Storfer, C, Treu, T, Wojtak, R, Zenati, Y

“…Supernovae (SNe) that have been multiply-imaged by gravitational lensing are rare and powerful probes for cosmology. Each detection is an opportunity to…”
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