Ultraviolet and Infrared Correlation Studies in Orion

Bose, Lakshmi S.; Sujatha, N. V.; Narayanankutty, K.

doi:10.1515/astro-2017-0233

Cited by 2 publications

(1 citation statement)

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“…Zodiacal light, the contributor to diffuse NUV which depend upon the angle from the sun and the distance from the ecliptic plane. The contribution using the optical distribution by assuming that the ratio between the zodiacal light and the solar spectrum is the same at all wavelengths and found to be 485 photons cm −2 sr −1 s −1 Å −1 following the procedure of Bose et al [30].…”

Section: Estimation Of Diffuse Uv Emissionmentioning

confidence: 99%

A Study of the Extragalactic UV Radiation in Helix Nebula using GALEX

Bose¹

2021

Walailak J Sci & Tech

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We have studied the ultraviolet sources using Galaxy Evolution Explorer medium imaging surveys in Helix Nebula and estimated UV fluxes by using aperture photometry in distant and near ultraviolet bands. The aperture photometric method produces reliable, accurate flux measurements and found inconsistent with the merged catalog of Galaxy Evolution Explorer. From the current results, the fluxes are consistent with brighter absolute magnitude up to 24.5 and the measurement error increases gradually to more than 50 % at the fainter magnitude side. Percentage of error in far UV is greater than near UV, due to the fact that brighter galaxies are more visible than the near UV sources. The diffuse UV contributors of zodiacal light, airglow contribution in the nebula were estimated. The total extragalactic UV radiation from the detected sources to the diffuse background in the nebula is of the order of 50 ± 14 photons cm-2sr-1s-1Å-1 in NUV band and 28 ±10 photons cm-2sr-1s-1Å-1 in FUV band. HIGHLIGHTS GALEX observations have the potential to find extragalactic UV sources Helix Nebula is first identified for distinct source detection Aperture photometric method can detect fainter sources up to the magnitude of 27 Extragalactic sources in the Helix nebula contribute to diffuse UV emission in the nebula GRAPHICAL ABSTRACT

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Section: Estimation Of Diffuse Uv Emissionmentioning

confidence: 99%