中文
相关论文

相关论文: A high-resolution extinction mapping technique for…

200 篇论文

The composition and properties of interstellar silicate dust are not well understood. In X-rays, interstellar dust can be studied in detail by making use of the fine structure features in the Si K-edge. The features in the Si K-edge offer a…

We present and analyze spatially-resolved maps for the observed $V$- and $g$-band to 3.6$\mu$m flux ratios and the inferred dust extinction values, $A_V$, for a sample of 257 nearby NGC and IC galaxies. Flux ratio maps are constructed using…

星系天体物理 · 物理学 2019-10-16 Duho Kim , Rolf A. Jansen , Rogier A. Windhorst , Seth H. Cohen , Tyler McCabe

We report results of a near--infrared imaging survey of L977, a dark cloud in Cygnus seen in projection against the plane of the Milky Way. We use measurements of the near--infrared color excess and positions of the 1628 brightest stars in…

天体物理学 · 物理学 2009-10-30 J. Alves , C. Lada , E. Lada , S. Kenyon , R. Phelps

Inferences about the spatial density or phase-space structure of stellar populations in the Milky Way require a precise determination of the effective survey volume. The volume observed by surveys such as Gaia or near-infrared spectroscopic…

星系天体物理 · 物理学 2016-06-07 Jo Bovy , Hans-Walter Rix , Gregory M. Green , Edward F. Schlafly , Douglas P. Finkbeiner

We have measured the radial brightness distributions in the disks of three nearby face-on spirals: M 51, NGC 3631, and NGC 4321 (M 100) in the photometric bands B through I, with the addition of the K band for M 51 only. The measurements…

天体物理学 · 物理学 2009-10-28 J. E. Beckman , R. F. Peletier , J. H. Knapen , R. L. M. Corradi , L. J. Gentet

By analyzing the spectral energy distributions (SEDs) of resolved stars in nearby galaxies, we can constrain their stellar properties and line-of-sight dust extinction. From the Scylla survey, we obtain ultraviolet to near-infrared…

We present a 8 deg x 6 deg, high resolution extinction map of the Pipe nebula using 4.5 million stars from the Two Micron All Sky Survey (2MASS) point source catalog. The use of NICER, a robust and optimal technique to map the dust column…

天体物理学 · 物理学 2009-11-11 Marco Lombardi , Joao Alves , Charles J. Lada

It has often been suggested that an alternative to the standard CO/21-cm method for estimating the mass of the interstellar medium (ISM) in a galaxy might be to estimate the mass of the ISM from the continuum dust emission. In this paper,…

We introduce a new approach to quantifying dust in galaxies by combining information from the Balmer decrement (BD) and the dust mass ($M_d$). While there is no explicit correlation between these two properties, they jointly probe different…

We report optical extinction properties of dust for a sample of 26 early-type galaxies based on the analysis of their multicolour CCD observations. The wavelength dependence of dust extinction for these galaxies is determined and the…

天体物理学 · 物理学 2007-05-23 M. K. Patil , S. K. Pandey , D. K. Sahu , A. K. Kembhavi

Near-infrared spectroscopy from APOGEE and wide-field optical photometry from Pan-STARRS1 have recently made possible precise measurements of the shape of the extinction curve for tens of thousands of stars, parameterized by R(V). These…

星系天体物理 · 物理学 2017-03-29 E. F. Schlafly , J. E. G. Peek , D. P. Finkbeiner , G. M. Green

In this study, we derived a galactic extinction map in high ecliptic latitudes for |\beta| > 30 degrees. The dust temperature distribution was derived from the intensities at 100 and 140 \mu m with a spatial resolution of 5'. The intensity…

星系天体物理 · 物理学 2015-06-12 Tsunehito Kohyama , Hiroshi Shibai , Misato Fukagawa , Takahiro Sumi , Yasunori Hibi

Understanding the properties and physical mechanisms that shape dust attenuation curves in galaxies is one of the fundamental questions of extragalactic astrophysics, with a great practical significance for deriving the physical properties…

星系天体物理 · 物理学 2020-11-11 Samir Salim , Desika Narayanan

The dust extinction of gamma-ray bursts (GRBs) host galaxies, containing important clues to the nature of GRB progenitors and crucial for dereddening, is still poorly known. Here we propose a straightforward method to determine the…

天体物理学 · 物理学 2009-03-12 Yuan Li , Aigen Li , Daming Wei

We present a new set of high resolution dust extinction maps of the nearby and essentially starless Pipe Nebula molecular cloud. The maps were constructed from a concerted deep near-infrared imaging survey with the ESO-VLT, ESO-NTT, CAHA…

星系天体物理 · 物理学 2010-12-23 Carlos Gerardo Román-Zúñiga , João F. Alves , Charles J. Lada , Marco Lombardi

We explore evolution in the dust-to-gas ratio with density within four well-resolved Local Group galaxies - the LMC, SMC, M31, and M33. We do this using new ${\it Herschel}$ maps, which restore extended emission that was missed by previous…

We present a method to simultaneously infer the interstellar extinction parameters $A_0$ and $R_0$, stellar effective temperature $T_{\rm eff}$, and distance modulus $\mu$ in a Bayesian framework. Using multi-band photometry from SDSS and…

星系天体物理 · 物理学 2015-06-18 R. J. Hanson , C. A. L. Bailer-Jones

Dust extinction is the most robust tracer of the gas distribution in the interstellar medium, but measuring extinction is limited by the systematic uncertainties involved in estimating the intrinsic colors to background stars. In this paper…

天体物理仪器与方法 · 物理学 2017-05-24 Stefan Meingast , Marco Lombardi , Joao Alves

We relate the optical attenuation inferred by the Balmer decrement, $A_{V\mathrm{,BD}}$, and by the SED-fitting, $A_{V\mathrm{,SED}}$, to the dust distribution and gas surface density throughout the disc of galaxies, down to scales smaller…

星系天体物理 · 物理学 2025-10-29 E. D. Paspaliaris , S. Bianchi , E. Corbelli , A. Concas

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