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Characterizing the structure of the Galactic interstellar medium (ISM) in three dimensions is of high importance for accurate modeling of dust emission as a foreground to the Cosmic Microwave Background (CMB). At high Galactic latitude,…

星系天体物理 · 物理学 2020-10-22 G. V. Panopoulou , D. Lenz

The unprecedented accuracy of JWST has led to the detection of silicate clouds in exoplanet atmospheres, allowing for the first time to probe cloud formation in extreme environments. While parametrized cloud descriptions can fit these…

地球与行星天体物理 · 物理学 2026-03-16 Sven Kiefer , Caroline V. Morley , Melanie Rowland

We report contributions to cosmic infrared background (CIB) intensities originating from known galaxies and their faint companions at submillimeter wavelengths. Using the publicly-available UltraVISTA catalog, and maps at 250, 350, and 500…

Precise, unbiased measurements of extragalactic background anisotropies require careful treatment of systematic effects in fluctuation-based, broad-band intensity mapping measurements. In this paper we detail improvements in methodology for…

Exoplanet emission spectra are often modelled assuming that the hemisphere observed is well represented by a horizontally homogenised atmosphere. However this approximation will likely fail for planets with a large temperature contrast in…

地球与行星天体物理 · 物理学 2021-06-04 Jake Taylor , Vivien Parmentier , Patrick G. J. Irwin , Suzanne Aigrain , Elspeth K. H. Lee , Joshua Krissansen-Totton

The far-infrared (FIR) opacity of dust in dark clouds within the Ophiuchus molecular cloud is investigated through multi-wavelength infrared observations from UKIDSS, Spitzer and Herschel. Employing the infrared color excess technique with…

星系天体物理 · 物理学 2024-02-19 Jun Li , Biwei Jiang , He Zhao , Xi Chen , Yang Yang

We present new deep near-infrared images of dark clouds in the Perseus molecular complex. These images show beautiful extended emission which we model as scattered ambient starlight and name ``cloudshine''. The brightness and color…

天体物理学 · 物理学 2009-11-13 Jonathan B. Foster , Alyssa A. Goodman

We present new methodology to use cosmic infrared background (CIB) fluctuations to probe sources at 10<z<30 from a JWST/NIRCam configuration that will isolate known galaxies to 28 AB mag at 0.5--5 micron. At present significant mutually…

宇宙学与河外天体物理 · 物理学 2015-05-20 A. Kashlinsky , J. C. Mather , K. Helgason , R. G. Arendt , V. Bromm , S. H. Moseley

(abridged) We develop the mid-infrared extinction (MIREX) mapping technique of Butler & Tan (2009, Paper I), presenting a new method to correct for the Galactic foreground emission based on observed saturation in independent cores. Using…

太阳与恒星天体物理 · 物理学 2015-06-05 Michael J. Butler , Jonathan C. Tan

We report weak-lensing masses for 51 of the most X-ray luminous galaxy clusters known. This cluster sample, introduced earlier in this series of papers, spans redshifts 0.15 < z_cl < 0.7, and is well suited to calibrate mass proxies for…

With current near-infrared (NIR) instruments the near-infrared light scattered from interstellar clouds can be mapped over large areas. The surface brightness carries information on the line-of-sight dust column density. Therefore,…

天体物理学 · 物理学 2009-11-13 M. Juvela , V. -M. Pelkonen , P. Padoan , K. Mattila

We study the reliability of mass estimates obtained for molecular cloud cores using sub-millimetre and infrared dust emission. We use magnetohydrodynamic simulations and radiative transfer to produce synthetic observations with spatial…

星系天体物理 · 物理学 2015-05-20 J. Malinen , M. Juvela , D. C. Collins , T. Lunttila , P. Padoan

Sub-millimetre dust emission is often used to derive the column density N of dense interstellar clouds. The observations consist of data at several wavelengths but of variable resolution. We examine two procedures that been proposed for the…

星系天体物理 · 物理学 2015-06-15 M. Juvela , J. Malinen , T. Lunttila

NICMOS observations of the resolved object fluxes in the Hubble Deep Field North and the Hubble Ultra Deep Field are significantly below the fluxes attributed to a 1.4 - 1.8 microns Near InfraRed Background Excess (NIRBE) from previous low…

天体物理学 · 物理学 2008-11-26 Rodger I. Thompson , Daniel Eisenstein , Xiaohui Fan , Marcia Rieke , Robert C. Kennicutt

We have applied the unsharp-masking technique to the 24 $\mu$m image of the Small Magellanic Cloud (SMC), obtained with the Spitzer Space Telescope, to search for high-extinction regions. This technique has been used to locate very dense…

Atmospheric lidar observations provide a unique capability to directly observe the vertical column of cloud and aerosol scattering properties. Detector and solar background noise, however, hinder the ability of lidar systems to provide…

Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During…

星系天体物理 · 物理学 2024-01-30 N. Zielinski , S. Wolf

Recent sub-millimeter dust thermal emission observations have unveiled a significant number of inter-arm massive molecular clouds in M31.However,the effectiveness of this technique is limited to its sensitivity,making it challenging to…

星系天体物理 · 物理学 2024-05-31 Cailing Chen , Zheng Zheng , Chao-Wei Tsai , Sihan Jiao , Jing Tang , Jingwen Wu , Di Li , Yun Zheng , Linjing Feng , Yujiao Yang , Yuan Liang

We study the correlations with inclination of H-band disk and bulge structural parameters and I-H colour profiles for a sample of 154 spiral galaxies, in order to detect possible effects due to internal extinction by dust. The selection of…

天体物理学 · 物理学 2007-05-23 G. Moriondo , R. Giovanelli , M. P. Haynes

Three-dimensional (3D) maps of the Galactic interstellar matter (ISM) are a potential tool of wide use, however accurate and detailed maps are still lacking. One of the ways to construct the maps is to invert individual distance-limited ISM…