Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Yoshiura S"'
Autor:
Chege, J. Kariuki, Jordan, C. H., Lynch, C., Trott, C. M., Line, J. L. B., Pindor, B., Yoshiura, S.
The redshifted cosmological 21 cm signal emitted by neutral hydrogen during the first billion years of the universe is much fainter relative to other galactic and extragalactic radio emissions, posing a great challenge towards detection of the signal
Externí odkaz:
http://arxiv.org/abs/2207.12090
Autor:
Rahimi, M., Pindor, B., Line, J. L. B., Barry, N., Trott, C. M., Webster, R. L., Jordan, C. H., Wilensky, M., Yoshiura, S., Beardsley, A., Bowman, J., Byrne, R., Chokshi, A., Hazelton, B. J., Hasegawa, K., Howard, E., Greig, B., Jacobs, D., Joseph, R., Kolopanis, M., Lynch, C., McKinley, B., Mitchell, D. A., Murray, S., Morales, M. F., Pober, J. C., Takahashi, K., Tingay, S. J., Wayth, R. B., Wyithe, J. S. B., Zheng, Q.
Current attempts to measure the 21cm Power Spectrum of neutral hydrogen during the Epoch of Reionization are limited by systematics which produce measured upper limits above both the thermal noise and the expected cosmological signal. These systemati
Externí odkaz:
http://arxiv.org/abs/2110.03190
Autor:
Trott, Cathryn M., Jordan, C. H., Line, J. L. B., Lynch, C. R., Yoshiura, S., McKinley, B., Dayal, P., Pindor, B., Hutter, A., Takahashi, K., Wayth, R. B., Barry, N., Beardsley, A., Bowman, J., Byrne, R., Chokshi, A., Greig, B., Hasegawa, K., Hazelton, B. J., Howard, E., Jacobs, D., Kolopanis, M., Mitchell, D. A., Morales, M. F., Murray, S., Pober, J. C., Rahimi, M., Tingay, S. J., Webster, R. L., Wilensky, M., Wyithe, J. S. B., Zheng, Q.
The locations of Ly-$\alpha$ emitting galaxies (LAEs) at the end of the Epoch of Reionisation (EoR) are expected to correlate with regions of ionised hydrogen, traced by the redshifted 21~cm hyperfine line. Mapping the neutral hydrogen around regions
Externí odkaz:
http://arxiv.org/abs/2107.14493
Autor:
Yoshiura, S., Pindor, B., Line, J. L. B., Barry, N., Trott, C. M., Beardsley, A., Bowman, J., Byrne, R., Chokshi, A., Hazelton, B. J., Hasegawa, K., Howard, E., Greig, B., Jacobs, D., Jordan, C. H., Joseph, R., Kolopanis, M., Lynch, C., McKinley, B., Mitchell, D. A., Morales, M. F., Murray, S. G., Pober, J. C., Rahimi, M., Takahashi, K., Tingay, S. J., Wayth, R. B., Webster, R. L., Wilensky, M., Wyithe, J. S. B., Zhang, Z., Zheng, Q.
Observations in the lowest MWA band between $75-100$ MHz have the potential to constrain the distribution of neutral hydrogen in the intergalactic medium at redshift $\sim 13-17$. Using 15 hours of MWA data, we analyse systematics in this band such a
Externí odkaz:
http://arxiv.org/abs/2105.12888
Autor:
Trott, Cathryn M., Jordan, C. H., Midgley, S., Barry, N., Greig, B., Pindor, B., Cook, J. H., Sleap, G., Tingay, S. J., Ung, D., Hancock, P., Williams, A., Bowman, J., Byrne, R., Chokshi, A., Hazelton, B. J., Hasegawa, K., Jacobs, D., Joseph, R. C., Li, W., Line, J. L. B, Lynch, C., McKinley, B., Mitchell, D. A., Morales, M. F., Ouchi, M., Pober, J. C., Rahimi, M., Takahashi, K., Wayth, R. B., Webster, R. L., Wilensky, M., Wyithe, J. S. B., Yoshiura, S., Zhang, Z., Zheng, Q.
We compute the spherically-averaged power spectrum from four seasons of data obtained for the Epoch of Reionisation (EoR) project observed with the Murchison Widefield Array (MWA). We measure the EoR power spectrum over $k= 0.07-3.0~h$Mpc$^{-1}$ at r
Externí odkaz:
http://arxiv.org/abs/2002.02575
Autor:
Li, W., Pober, J. C., Barry, N., Hazelton, B. J., Morales, M. F., Trott, C. M., Lanman, A., Wilensky, M., Sullivan, I., Beardsley, A. P., Booler, T., Bowman, J. D., Byrne, R., Crosse, B., Emrich, D., Franzen, T. M. O., Hasegawa, K., Horsley, L., Johnston-Hollitt, M., Jacobs, D. C., Jordan, C. H., Joseph, R. C., Kaneuji, T., Kaplan, D. L., Kenney, D., Kubota, K., Line, J., Lynch, C., McKinley, B., Mitchell, D. A., Murray, S., Pallot, D., Pindor, B., Rahimi, M., Riding, J., Sleap, G., Steele, K., Takahashi, K., Tingay, S. J., Walker, M., Wayth, R. B., Webster, R. L., Williams, A., Wu, C., Wyithe, J. S. B., Yoshiura, S., Zheng, Q.
Publikováno v:
ApJ (2019) 887 141
The compact configuration of Phase II of the Murchison Widefield Array (MWA) consists of both a redundant subarray and pseudo-random baselines, offering unique opportunities to perform sky-model and redundant interferometric calibration. The highly r
Externí odkaz:
http://arxiv.org/abs/1911.10216
Autor:
Beardsley, A. P., Johnston-Hollitt, M., Trott, C. M., Pober, J. C., Morgan, J., Oberoi, D., Kaplan, D. L., Lynch, C. R., Anderson, G. E., McCauley, P. I., Croft, S., James, C. W., Wong, O. I., Tremblay, C. D., Norris, R. P., Cairns, I. H., Lonsdale, C. J., Hancock, P. J., Gaensler, B. M., Bhat, N. D. R., Li, W., Hurley-Walker, N., Callingham, J. R., Seymour, N., Yoshiura, S., Joseph, R. C., Takahashi, K., Sokolowski, M., Miller-Jones, J. C. A., Chauhan, J. V., Bojičić, I., Filipović, M. D., Leahy, D., Su, H., Tian, W. W., McSweeney, S. J., Meyers, B. W., Kitaeff, S., Vernstrom, T., Gürkan, G., Heald, G., Xue, M., Riseley, C. J., Duchesne, S. W., Bowman, J. D., Jacobs, D. C., Crosse, B., Emrich, D., Franzen, T. M. O., Horsley, L., Kenney, D., Morales, M. F., Pallot, D., Steele, K., Tingay, S. J., Walker, M., Wayth, R. B., Williams, A., Wu, C.
The Murchison Widefield Array (MWA) is an open access telescope dedicated to studying the low frequency (80$-$300 MHz) southern sky. Since beginning operations in mid 2013, the MWA has opened a new observational window in the southern hemisphere enab
Externí odkaz:
http://arxiv.org/abs/1910.02895
Autor:
Barry, N., Wilensky, M., Trott, C. M., Pindor, B., Beardsley, A. P., Hazelton, B. J., Sullivan, I. S., Morales, M. F., Pober, J. C., Line, J., Greig, B., Byrne, R., Lanman, A., Li, W., Jordan, C. H., Joseph, R. C., McKinley, B., Rahimi, M., Yoshiura, S., Bowman, J. D., Gaensler, B. M., Hewitt, J. N., Jacobs, D. C., Mitchell, D. A., Shankar, N. Udaya, Sethi, S. K., Subrahmanyan, R., Tingay, S. J., Webster, R. L., Wyithe, J. S. B.
Measurements of 21 cm Epoch of Reionization (EoR) structure are subject to systematics originating from both the analysis and the observation conditions. Using 2013 data from the Murchison Widefield Array (MWA), we show the importance of mitigating b
Externí odkaz:
http://arxiv.org/abs/1909.00561
Autor:
Trott, Cathryn M., Fu, Shih Ching, Murray, Steven, Jordan, Christopher, Line, Jack, Barry, N., Byrne, R., Hazelton, B. J., Hasegawa, K., Joseph, R., Kaneuji, T., Kubota, K., Li, W., Lynch, C., McKinley, B., Mitchell, D. A., Morales, M. F., Pindor, B., Pober, J. C., Rahimi, M., Takahashi, K., Tingay, S. J., Wayth, R. B., Webster, R. L., Wilensky, M., Wyithe, J. S. B., Yoshiura, S., Zheng, Q., Walker, M.
We explore methods for robust estimation of the 21 cm signal from the Epoch of Reionisation (EoR). A Kernel Density Estimator (KDE) is introduced for measuring the spatial temperature fluctuation power spectrum from the EoR. The KDE estimates the und
Externí odkaz:
http://arxiv.org/abs/1904.11623
Observation of the 21cm line signal from neutral hydrogen during the Epoch of Reionization is challenging due to extremely bright Galactic and extragalactic foregrounds and complicated instrumental calibration. A reasonable approach for mitigating th
Externí odkaz:
http://arxiv.org/abs/1803.00756