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相关论文: GALEX Observations of Diffuse UV Radiation at High…

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We have used GALEX observations of the North and South Galactic poles to study the diffuse ultraviolet background at locations where the Galactic light is expected to be at a minimum. We find offsets of 230 -- 290 photon units in the FUV…

星系天体物理 · 物理学 2018-05-23 M. S. Akshaya , Jayant Murthy , S. Ravichandran , R. C. Henry , James Overduin

We present a map of the diffuse ultraviolet cosmic background in two wavelength bands (FUV: 1530 {\AA}; NUV: 2310 {\AA}) over almost 75% of the sky using archival data from the GALEX mission. Most of the diffuse flux is due to…

星系天体物理 · 物理学 2010-11-30 Jayant Murthy , Richard C. Henry , N. V. Sujatha

We have studied small scale (2 arcmin) spatial variation of the diffuse UV radiation using a set of 11 GALEX deep observations in the constellation of Draco. We find a good correlation between the observed UV background and the IR 100…

星系天体物理 · 物理学 2015-05-20 N. V. Sujatha , Jayant Murthy , Rahul Suresh , Richard Conn Henry , Luciana Bianchi

We have used data from the Galaxy Evolution Explorer to study the different components of the diffuse ultraviolet background in the region between the Galactic latitudes 70-80 degree. We find an offset at zero dust column density (E(B - V)…

星系天体物理 · 物理学 2019-08-12 M. S. Akshaya , Jayant Murthy , S. Ravichandran , R. C. Henry , James Overduin

The diffuse cosmic background radiation in the GALEX far ultraviolet (FUV, 1300 \AA\ - 1700 \AA) is deduced to originate only partially in the dust-scattered radiation of FUV-emitting stars: the source of a substantial fraction of the FUV…

星系天体物理 · 物理学 2015-06-19 Richard Conn Henry , Jayant Murthy , James Overduin , Joshua Tyler

Circumgalactic dust grains trace the circulation of mass and metals between star-forming regions and gaseous galactic halos, giving insight into feedback and tidal stripping processes. We perform a search for ultraviolet (UV) reflection…

星系天体物理 · 物理学 2024-08-23 Erin Boettcher , Edmund Hodges-Kluck

A bright UV GALEX image in the direction of a dense high galactic latitude interstellar dust cloud is examined to test (and to reject) the idea that a bright extragalactic UV background radiation field exists. A GALEX "Deep Imaging Survey"…

星系天体物理 · 物理学 2009-06-17 Richard Conn Henry

We have modeled the diffuse background at the Galactic Poles in the far-ultraviolet (FUV: 1536 \AA) and the near-ultraviolet (NUV: 2316 \AA). The background is well-fit using a single-scattering dust model with an offset representing the…

星系天体物理 · 物理学 2023-09-06 Jayant Murthy , Richard C. Henry , James Overduin

We have discovered ultraviolet halos extending as far as 5{\deg} around four (of six) bright UV stars using data from the GALEX satellite. These halos are due to the scattering of the starlight from nearby thin, foreground dust clouds. We…

星系天体物理 · 物理学 2011-09-13 Jayant Murthy , Richard Conn Henry

The far-ultraviolet (FUV) diffuse emission is predominantly due to scattering of starlight from interstellar dust grains which shows a large regional variation depending on the relative orientations of dust and stars. The observations of…

星系天体物理 · 物理学 2013-07-05 Ananta C. Pradhan

We have studied the diffuse radiation in the surroundings of M42 using photometric data from the Galaxy Evolution Explorer (GALEX) in the far-ultraviolet (FUV) and infrared observations of the AKARI space telescope. The main source of the…

星系天体物理 · 物理学 2018-03-21 Gautam Saikia , P. Shalima , Rupjyoti Gogoi

We present an all sky map of the diffuse Galactic far ultraviolet (1344-1786 Angstroms) background using GALEX data, covering 65% of the sky with 11.79 arcmin square pixels. We investigate the dependence of the background on Galactic…

星系天体物理 · 物理学 2015-06-17 Erika Hamden , David Schiminovich , Mark Seibert

CONTEXT: The Virgo direction has been observed at many wavelengths in the recent years, in particular in the ultraviolet with GALEX. The far ultraviolet (FUV) diffuse light detected by GALEX bears interesting information on the large scale…

The optical surface brightness of dark nebulae is mainly due to scattering of integrated starlight by classical dust grains. It contains information on the impinging interstellar radiation field, cloud structure, and grain scattering…

星系天体物理 · 物理学 2016-12-21 K. Lehtinen , K. Mattila

I explore models of the dust-scattered component of the Cosmic Ultraviolet Background (CUVB) at the North Galactic Pole (NGP) in order to develop a framework for calculating the dust-scattered light as a function of the optical depths. As…

天体物理仪器与方法 · 物理学 2025-07-08 Jayant Murthy

We have found variations in the diffuse ultraviolet background on the scale about 10 days over the 10 year life of the GALEX mission. These variations are only apparent in the near-ultraviolet band of GALEX and are most likely related to…

星系天体物理 · 物理学 2022-02-01 Jayant Murthy , Amith S. Gowtham

We present a multi-wavelength correlation study of diffuse ultraviolet radiation using GALEX observations towards the Aquila Rift. Apart from airglow and zodiacal emissions, we find a diffuse background of 1300 - 3700 \photu\ in the…

星系天体物理 · 物理学 2018-09-24 S. N. Jyothy , N. V. Sujatha , Narayanankutty Karuppath

In 1992 the Far-Ultraviolet Space Telescope (FAUST) provided measurements of the ultraviolet (140-180nm) diffuse sky background at high, medium, and low Galactic latitudes. A significant fraction of the detected radiation was found to be of…

天体物理学 · 物理学 2009-10-30 Adolf N. Witt , Brian C. Friedmann , Timothy P. Sasseen

We present spectra of the diffuse FUV (900 -- 1200 \AA) emission from a region near the Orion Nebula: the first high resolution spectra of the diffuse background radiation. These observations were made using serendipitous FUSE observations…

天体物理学 · 物理学 2009-11-10 Jayant Murthy , David J. Sahnow , R. C. Henry

We present Galaxy Evolution Explorer (GALEX) far-UV and near-UV mosaic observations covering the entirety of M31 and M33. For both targets, we measure the decline of surface brightness (in FUV and NUV) and changes in FUV--NUV color as a…

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