Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot dataCitation formats

  • External authors:
  • Melis O Irfan
  • Philip Bull
  • Mario G. Santos
  • Jingying Wang
  • Yichao Li
  • Isabella P. Carucci
  • Marta Spinelli
  • Steven Cunnington

Standard

Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot data. / Irfan, Melis O; Bull, Philip; Santos, Mario G.; Wang, Jingying; Grainge, Keith; Li, Yichao; Carucci, Isabella P. ; Spinelli, Marta; Cunnington, Steven.

In: Monthly Notices of the Royal Astronomical Society, 23.11.2021.

Research output: Contribution to journal › Article › peer-review

Harvard

Irfan, MO, Bull, P, Santos, MG, Wang, J, Grainge, K, Li, Y, Carucci, IP, Spinelli, M & Cunnington, S 2021, 'Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot data', Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1093/mnras/stab3346

APA

Irfan, M. O., Bull, P., Santos, M. G., Wang, J., Grainge, K., Li, Y., Carucci, I. P., Spinelli, M., & Cunnington, S. (2021). Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot data. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1093/mnras/stab3346

Vancouver

Irfan MO, Bull P, Santos MG, Wang J, Grainge K, Li Y et al. Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot data. Monthly Notices of the Royal Astronomical Society. 2021 Nov 23. https://doi.org/10.1093/mnras/stab3346

Author

Irfan, Melis O ; Bull, Philip ; Santos, Mario G. ; Wang, Jingying ; Grainge, Keith ; Li, Yichao ; Carucci, Isabella P. ; Spinelli, Marta ; Cunnington, Steven. / Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot data. In: Monthly Notices of the Royal Astronomical Society. 2021.

Bibtex

@article{477d1066053b49a2b0be6692a74f5055,
title = "Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot data",
abstract = "21cm intensity mapping experiments are bringing an influx of high spectral resolution observational data in the ∼ 100 MHz – 1 GHz regime. We use pilot 971 − 1075 MHz data from MeerKAT in single-dish mode, recently used to test the calibration and data reduction scheme of the upcoming MeerKLASS survey, to probe the spectral index of diffuse synchrotron emission below 1 GHz within 145◦ < 훼 < 180◦, −1◦ < 훿 < 8◦. Through comparisons with datafrom the OVRO Long Wavelength Array and the Maipu and MU surveys, we find an average spectral index of −2.75 < 훽 < −2.71 between 45 and 1055 MHz. By fitting for spectral curvature with a spectral index of the form 훽 + 푐 ln(휈/73 MHz), we measure 훽 = −2.55±0.13 and 푐 = −0.12 ± 0.05 within our target field. Our results are in good agreement (within 1휎) with existing measurements from experiments such as ARCADE2 and EDGES. These results show the calibration accuracy of current data and demonstrate that MeerKLASS will also be capable of achieving a secondary science goal of probing the interstellar medium.",
author = "Irfan, {Melis O} and Philip Bull and Santos, {Mario G.} and Jingying Wang and Keith Grainge and Yichao Li and Carucci, {Isabella P.} and Marta Spinelli and Steven Cunnington",
year = "2021",
month = nov,
day = "23",
doi = "10.1093/mnras/stab3346",
language = "English",
journal = "Royal Astronomical Society. Monthly Notices",
issn = "1365-2966",
publisher = "Oxford University Press",

}

RIS

TY - JOUR

T1 - Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot data

AU - Irfan, Melis O

AU - Bull, Philip

AU - Santos, Mario G.

AU - Wang, Jingying

AU - Grainge, Keith

AU - Li, Yichao

AU - Carucci, Isabella P.

AU - Spinelli, Marta

AU - Cunnington, Steven

PY - 2021/11/23

Y1 - 2021/11/23

N2 - 21cm intensity mapping experiments are bringing an influx of high spectral resolution observational data in the ∼ 100 MHz – 1 GHz regime. We use pilot 971 − 1075 MHz data from MeerKAT in single-dish mode, recently used to test the calibration and data reduction scheme of the upcoming MeerKLASS survey, to probe the spectral index of diffuse synchrotron emission below 1 GHz within 145◦ < 훼 < 180◦, −1◦ < 훿 < 8◦. Through comparisons with datafrom the OVRO Long Wavelength Array and the Maipu and MU surveys, we find an average spectral index of −2.75 < 훽 < −2.71 between 45 and 1055 MHz. By fitting for spectral curvature with a spectral index of the form 훽 + 푐 ln(휈/73 MHz), we measure 훽 = −2.55±0.13 and 푐 = −0.12 ± 0.05 within our target field. Our results are in good agreement (within 1휎) with existing measurements from experiments such as ARCADE2 and EDGES. These results show the calibration accuracy of current data and demonstrate that MeerKLASS will also be capable of achieving a secondary science goal of probing the interstellar medium.

AB - 21cm intensity mapping experiments are bringing an influx of high spectral resolution observational data in the ∼ 100 MHz – 1 GHz regime. We use pilot 971 − 1075 MHz data from MeerKAT in single-dish mode, recently used to test the calibration and data reduction scheme of the upcoming MeerKLASS survey, to probe the spectral index of diffuse synchrotron emission below 1 GHz within 145◦ < 훼 < 180◦, −1◦ < 훿 < 8◦. Through comparisons with datafrom the OVRO Long Wavelength Array and the Maipu and MU surveys, we find an average spectral index of −2.75 < 훽 < −2.71 between 45 and 1055 MHz. By fitting for spectral curvature with a spectral index of the form 훽 + 푐 ln(휈/73 MHz), we measure 훽 = −2.55±0.13 and 푐 = −0.12 ± 0.05 within our target field. Our results are in good agreement (within 1휎) with existing measurements from experiments such as ARCADE2 and EDGES. These results show the calibration accuracy of current data and demonstrate that MeerKLASS will also be capable of achieving a secondary science goal of probing the interstellar medium.

U2 - 10.1093/mnras/stab3346

DO - 10.1093/mnras/stab3346

M3 - Article

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

SN - 1365-2966

ER -