Separating 21-cm M31 signal from background

Research Article
Open access

Separating 21-cm M31 signal from background

Wenlan Miao 1*
  • 1 Sichuan University    
  • *corresponding author miaowl12@163.com
Published on 8 December 2023 | https://doi.org/10.54254/2753-8818/18/20230450
TNS Vol.18
ISSN (Print): 2753-8826
ISSN (Online): 2753-8818
ISBN (Print): 978-1-83558-201-5
ISBN (Online): 978-1-83558-202-2

Abstract

By investigating 21 cm radio wave emitted by Hydrogen gas in Milky Way galaxy we can determine the intensity map of M31(a.k.a.,"Andromeda"). The author applied the data sets collected by 18m radio telescope pointing at different locations of M31 and using FFT, double subtraction method and matplotlib to visualize the data in the term of power spectral density-Doppler velocity spectrum. Then the author compared the spectrum and used the structure of M31 to explain the difference between the on-source spectrum and background spectrum.

Keywords:

radio astronomy, andromeda, galaxy structure, spectrum analysis

Miao,W. (2023). Separating 21-cm M31 signal from background. Theoretical and Natural Science,18,302-307.
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References

[1]. Results for Messier 31. NASA/IPAC Extragalactic Database

[2]. De Vaucouleurs, Gerard; De Vaucouleurs, Antoinette; Corwin, Herold G.; Buta, Ronald J.; Paturel, Georges; Fouque, Pascal (1991) Third Reference Catalogue of Bright Galaxies

[3]. Ribas, Ignasi; Jordi, Carme; Vilardell, Francesc; et al. (2005). "First Determination of the Distance and Fundamental Properties of an Eclipsing Binary in the Andromeda Galaxy". Astrophysical Journal Letters. 635 (1): L37–L40.

[4]. "NASA's Hubble Shows Milky Way is Destined for Head-On Collision". NASA. 31 May 2012. Archived from the original on 4 June 2014. Retrieved 12 July 2012.

[5]. Ueda, Junko; Iono, Daisuke; Yun, Min S.; et al. (2014). "Cold molecular gas in merger remnants. I. Formation of molecular gas disks". The Astrophysical Journal Supplement Series. 214 (1): 1

[6]. "M 31, M 32 & M 110". 15 October 2016.

[7]. Arp, Halton (1964). "Spiral Structure in M31". Astrophysical Journal. 139: 1045.

[8]. Simien, François; Pellet, André; Monnet, Guy; et al. (1978). "The spiral structure of M31 – A morphological approach". Astronomy and Astrophysics.


Cite this article

Miao,W. (2023). Separating 21-cm M31 signal from background. Theoretical and Natural Science,18,302-307.

Data availability

The datasets used and/or analyzed during the current study will be available from the authors upon reasonable request.

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About volume

Volume title: Proceedings of the 2nd International Conference on Computing Innovation and Applied Physics

ISBN:978-1-83558-201-5(Print) / 978-1-83558-202-2(Online)
Editor:Marwan Omar, Roman Bauer
Conference website: https://www.confciap.org/
Conference date: 25 March 2023
Series: Theoretical and Natural Science
Volume number: Vol.18
ISSN:2753-8818(Print) / 2753-8826(Online)

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References

[1]. Results for Messier 31. NASA/IPAC Extragalactic Database

[2]. De Vaucouleurs, Gerard; De Vaucouleurs, Antoinette; Corwin, Herold G.; Buta, Ronald J.; Paturel, Georges; Fouque, Pascal (1991) Third Reference Catalogue of Bright Galaxies

[3]. Ribas, Ignasi; Jordi, Carme; Vilardell, Francesc; et al. (2005). "First Determination of the Distance and Fundamental Properties of an Eclipsing Binary in the Andromeda Galaxy". Astrophysical Journal Letters. 635 (1): L37–L40.

[4]. "NASA's Hubble Shows Milky Way is Destined for Head-On Collision". NASA. 31 May 2012. Archived from the original on 4 June 2014. Retrieved 12 July 2012.

[5]. Ueda, Junko; Iono, Daisuke; Yun, Min S.; et al. (2014). "Cold molecular gas in merger remnants. I. Formation of molecular gas disks". The Astrophysical Journal Supplement Series. 214 (1): 1

[6]. "M 31, M 32 & M 110". 15 October 2016.

[7]. Arp, Halton (1964). "Spiral Structure in M31". Astrophysical Journal. 139: 1045.

[8]. Simien, François; Pellet, André; Monnet, Guy; et al. (1978). "The spiral structure of M31 – A morphological approach". Astronomy and Astrophysics.