The stellar contribution to the extragalactic background light: Implications for propagation of ultra high energy cosmic rays and TeV gamma rays

Soebur Razzaque; Justin D. Finke; Charles D. Dermer

The stellar contribution to the extragalactic background light: Implications for propagation of ultra high energy cosmic rays and TeV gamma rays

Soebur Razzaque, Justin D. Finke, Charles D. Dermer

Research output: Contribution to conference › Paper › peer-review

Abstract

We present models of extragalactic background light (EBL) from the infrared to ultraviolet derived from the stellar initial mass function, star formation history of the universe, and absorption of ultraviolet photons by dust and reemission in infrared. These models are simultaneously fitted to the EBL data as well as to the data on the stellar luminosity density. We discuss implications of our results for the propagation of ultrahighenergy cosmic rays and TeV gamma rays from their sources to Earth in the EBL, and a calculation of the gamma- ray horizon for UHECR protons. The results are applied to the highest energy photons observed from extragalactic sources measured with the Fermi Gamma ray Space Telescope.

Original language	English
Publication status	Published - 2009
Externally published	Yes
Event	31st International Cosmic Ray Conference, ICRC 2009 - Lodz, Poland Duration: 7 Jul 2009 → 15 Jul 2009

Conference

Conference	31st International Cosmic Ray Conference, ICRC 2009
Country/Territory	Poland
City	Lodz
Period	7/07/09 → 15/07/09

Keywords

Cosmic rays
Diffuse radiation
Gamma-rays

ASJC Scopus subject areas

Nuclear and High Energy Physics

Cite this

@conference{b876f4ac6f444559b074509c31a9daec,

title = "The stellar contribution to the extragalactic background light: Implications for propagation of ultra high energy cosmic rays and TeV gamma rays",

abstract = "We present models of extragalactic background light (EBL) from the infrared to ultraviolet derived from the stellar initial mass function, star formation history of the universe, and absorption of ultraviolet photons by dust and reemission in infrared. These models are simultaneously fitted to the EBL data as well as to the data on the stellar luminosity density. We discuss implications of our results for the propagation of ultrahighenergy cosmic rays and TeV gamma rays from their sources to Earth in the EBL, and a calculation of the gamma- ray horizon for UHECR protons. The results are applied to the highest energy photons observed from extragalactic sources measured with the Fermi Gamma ray Space Telescope.",

keywords = "Cosmic rays, Diffuse radiation, Gamma-rays",

author = "Soebur Razzaque and Finke, {Justin D.} and Dermer, {Charles D.}",

year = "2009",

language = "English",

note = "31st International Cosmic Ray Conference, ICRC 2009 ; Conference date: 07-07-2009 Through 15-07-2009",

}

TY - CONF

T1 - The stellar contribution to the extragalactic background light

T2 - 31st International Cosmic Ray Conference, ICRC 2009

AU - Razzaque, Soebur

AU - Finke, Justin D.

AU - Dermer, Charles D.

PY - 2009

Y1 - 2009

N2 - We present models of extragalactic background light (EBL) from the infrared to ultraviolet derived from the stellar initial mass function, star formation history of the universe, and absorption of ultraviolet photons by dust and reemission in infrared. These models are simultaneously fitted to the EBL data as well as to the data on the stellar luminosity density. We discuss implications of our results for the propagation of ultrahighenergy cosmic rays and TeV gamma rays from their sources to Earth in the EBL, and a calculation of the gamma- ray horizon for UHECR protons. The results are applied to the highest energy photons observed from extragalactic sources measured with the Fermi Gamma ray Space Telescope.

AB - We present models of extragalactic background light (EBL) from the infrared to ultraviolet derived from the stellar initial mass function, star formation history of the universe, and absorption of ultraviolet photons by dust and reemission in infrared. These models are simultaneously fitted to the EBL data as well as to the data on the stellar luminosity density. We discuss implications of our results for the propagation of ultrahighenergy cosmic rays and TeV gamma rays from their sources to Earth in the EBL, and a calculation of the gamma- ray horizon for UHECR protons. The results are applied to the highest energy photons observed from extragalactic sources measured with the Fermi Gamma ray Space Telescope.

KW - Cosmic rays

KW - Diffuse radiation

KW - Gamma-rays

UR - http://www.scopus.com/inward/record.url?scp=84899075155&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:84899075155

Y2 - 7 July 2009 through 15 July 2009

ER -

The stellar contribution to the extragalactic background light: Implications for propagation of ultra high energy cosmic rays and TeV gamma rays

Abstract

Conference

Keywords

ASJC Scopus subject areas

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