Snr Radio Spectral Index Distribution and Its Correlation with Polarization. a Case Study: the Lupus Loop
Abstract
We use radio-continuum all-sky surveys at 1420 and 408 MHz with the aim to investigate properties of the Galactic radio source Lupus Loop. The survey data at 1435 MHz, with the linear polarization of the southern sky, are also used. We calculate properties of this supernova remnant: the brightness temperature, surface brightness and radio spectral index. To determine its borders and to calculate its properties, we use the method we have developed. The non-thermal nature of its radiation is confirmed. The distribution of spectral index over its area is also given. A significant correlation between the radio spectral index distribution and the corresponding polarized intensity distribution inside the loop borders is found, indicating that the polarization maps could provide us information about the distribution of the interstellar medium, and thus could represent one additional way to search for new Galactic loops.
Keywords:
ISM: supernova remnants / radiation mechanisms: non-thermal / radio continuum: ISMSource:
Revista Mexicana de Astronomia y Astrofisica, 2017, 53, 1, 37-44Funding / projects:
- Gravitation and the large scale structure of the Universe (RS-MESTD-Basic Research (BR or ON)-176003)
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Institution/Community
VinčaTY - JOUR AU - Borka Jovanović, Vesna AU - Jovanović, Predrag AU - Borka, Duško PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1496 AB - We use radio-continuum all-sky surveys at 1420 and 408 MHz with the aim to investigate properties of the Galactic radio source Lupus Loop. The survey data at 1435 MHz, with the linear polarization of the southern sky, are also used. We calculate properties of this supernova remnant: the brightness temperature, surface brightness and radio spectral index. To determine its borders and to calculate its properties, we use the method we have developed. The non-thermal nature of its radiation is confirmed. The distribution of spectral index over its area is also given. A significant correlation between the radio spectral index distribution and the corresponding polarized intensity distribution inside the loop borders is found, indicating that the polarization maps could provide us information about the distribution of the interstellar medium, and thus could represent one additional way to search for new Galactic loops. T2 - Revista Mexicana de Astronomia y Astrofisica T1 - Snr Radio Spectral Index Distribution and Its Correlation with Polarization. a Case Study: the Lupus Loop VL - 53 IS - 1 SP - 37 EP - 44 UR - https://hdl.handle.net/21.15107/rcub_vinar_1496 ER -
@article{ author = "Borka Jovanović, Vesna and Jovanović, Predrag and Borka, Duško", year = "2017", abstract = "We use radio-continuum all-sky surveys at 1420 and 408 MHz with the aim to investigate properties of the Galactic radio source Lupus Loop. The survey data at 1435 MHz, with the linear polarization of the southern sky, are also used. We calculate properties of this supernova remnant: the brightness temperature, surface brightness and radio spectral index. To determine its borders and to calculate its properties, we use the method we have developed. The non-thermal nature of its radiation is confirmed. The distribution of spectral index over its area is also given. A significant correlation between the radio spectral index distribution and the corresponding polarized intensity distribution inside the loop borders is found, indicating that the polarization maps could provide us information about the distribution of the interstellar medium, and thus could represent one additional way to search for new Galactic loops.", journal = "Revista Mexicana de Astronomia y Astrofisica", title = "Snr Radio Spectral Index Distribution and Its Correlation with Polarization. a Case Study: the Lupus Loop", volume = "53", number = "1", pages = "37-44", url = "https://hdl.handle.net/21.15107/rcub_vinar_1496" }
Borka Jovanović, V., Jovanović, P.,& Borka, D.. (2017). Snr Radio Spectral Index Distribution and Its Correlation with Polarization. a Case Study: the Lupus Loop. in Revista Mexicana de Astronomia y Astrofisica, 53(1), 37-44. https://hdl.handle.net/21.15107/rcub_vinar_1496
Borka Jovanović V, Jovanović P, Borka D. Snr Radio Spectral Index Distribution and Its Correlation with Polarization. a Case Study: the Lupus Loop. in Revista Mexicana de Astronomia y Astrofisica. 2017;53(1):37-44. https://hdl.handle.net/21.15107/rcub_vinar_1496 .
Borka Jovanović, Vesna, Jovanović, Predrag, Borka, Duško, "Snr Radio Spectral Index Distribution and Its Correlation with Polarization. a Case Study: the Lupus Loop" in Revista Mexicana de Astronomia y Astrofisica, 53, no. 1 (2017):37-44, https://hdl.handle.net/21.15107/rcub_vinar_1496 .