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相关论文: Components of the Diffuse Ultraviolet Radiation at…

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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 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

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

The diffuse far-ultraviolet (FUV) background has received considerable attention from astronomers since the 1970's. The initial impetus came from the hope of detecting UV radiation from the hot intergalactic medium. The central importance…

星系天体物理 · 物理学 2022-08-31 S. R. Kulkarni

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 Voyager and Galex observations to map the diffuse Galactic light near the Galactic equator. We find that most of the observations are relatively faint with surface brightnesses of less than 5,000 photon units. This is important…

星系天体物理 · 物理学 2020-04-14 Jayant Murthy , R. C. Henry , James Overduin

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

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

Using the GALEX ultraviolet imagers we have observed a region of nebulosity first identified as starlight scattered by interstellar dust by Sandage (1976). Apart from airglow and zodiacal emission, we have found a diffuse UV background of…

天体物理学 · 物理学 2011-02-11 N. V. Sujatha , Jayant Murthy , Abhay Karnataki , Richard Conn Henry , Luciana Bianchi

We present new observations of the cosmic ultraviolet background (CUVB) at high Galactic latitudes ($|b| > 40^{\circ}$), made using the Alice UV spectrograph on board the New Horizons spacecraft. These observations were taken at about 57 AU…

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 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

Recent availability of high quality infrared (IR) data for diffuse regions in the Galaxy and external galaxies have added to our understanding of interstellar dust. A comparison of ultraviolet (UV) and IR observations may be used to…

星系天体物理 · 物理学 2017-05-02 Gautam Saikia , P. Shalima , Rupjyoti Gogoi , Amit Pathak

We present an analysis of the diffuse ultraviolet (UV) background in a low latitude region near the Aquila Rift based on observations made by the Galaxy Evolution Explorer (GALEX). The UV background is at a level of about 2000 ph cm^-2 s^-1…

星系天体物理 · 物理学 2015-10-14 S. N. Jyothy , Jayant Murthy , Narayanankutty Karuppath , N. V. Sujatha

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

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

Extinction in ultraviolet is much more significant than in optical or infrared, which can be very informative to precisely measure the extinction and understand the dust properties in the low extinction areas. The high Galactic latitude sky…

星系天体物理 · 物理学 2021-06-23 Mingxu Sun , Biwei Jiang , Haibo Yuan , Jun Li

In order to study the properties and effects of high Galactic latitude dust we present an analysis of 373,303 galaxies selected from the Galaxy Evolution Explorer (GALEX) All-Sky Survey and Wide-Field Infrared Explorer (WISE) All-Sky Data…

星系天体物理 · 物理学 2015-06-15 J. E. G. Peek , David Schiminovich

We present the first observations of diffuse radiation in the far ultraviolet (1000 -- 1150 \AA) from the Large Magellanic Cloud based on observations made with the {\it Far Ultraviolet Spectroscopic Explorer}. The fraction of the total…

星系天体物理 · 物理学 2015-05-19 Ananta C. Pradhan , Amit Pathak , Jayant Murthy

The diffuse far-ultraviolet (FUV) continuum radiation "longward" of Ly-alpha (1216A) is well known to correlate with the dust emission at 100 um. However, it has been claimed that the FUV continuum background "shortward" of Ly-alpha shows…

星系天体物理 · 物理学 2015-06-16 Kwang-Il Seon
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