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Related papers: Modeling anomalous extinction using nanodiamonds

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Differential $E_{V-I}$ variations of up to $\sim 0.2$ mag on a scale of arcminutes across NGC 3201 are presented in the form of an extinction map. This map, created by calculating average $E_{V-I}$ values for stars in small subregions of…

Astrophysics · Physics 2009-10-31 Kaspar von Braun , Mario Mateo

Diamond-based photonic devices offer exceptional opportunity to study cavity QED at room temperature. Here we report fabrication and optical characterization of high quality photonic crystal (PC) microcavities based on nanocrystalline…

Materials Science · Physics 2009-11-13 Chiou-Fu Wang , Ronald Hanson , Tatyana Feygelson , Jie Yang , James Butler , David Awschalom , Evelyn Hu

Nitrogen-doped ultrananocrystalline diamond (N-UNCD) is a form of diamond electrode with near-infrared photoresponsivity, making it well suited for physiological applications. N-UNCD's photoresponsivity is strongly influenced by its…

Applied Physics · Physics 2024-06-25 Samira Falahatdoost , Andre Chambers , Alastair Stacey , Steven Prawer , Arman Ahnood

We explore the extinction properties of the dust in the distant universe through the afterglows of high-redshifted GRBs based on the "Drude" model which, unlike previous studies, does not require a prior assumption of template extinction…

Astrophysics · Physics 2008-12-18 S. L. Liang , Aigen Li

Nano-diamonds remain an intriguing component of the dust in the few sources where they have been observed in emission. This work focusses on the nano-diamonds observed in circumstellar discs and is an attempt to derive critical information…

Astrophysics of Galaxies · Physics 2022-09-07 Anthony P. Jones

We analyze the X-ray scattering halos around three Galactic Anomalous X-ray Pulsars (AXPs) in order to constrain the distance and the optical extinction of each source. We obtain surface brightness distributions from EPIC-pn data obtained…

Astrophysics of Galaxies · Physics 2010-01-26 A. Rivera-Ingraham , M. H. van Kerkwijk

Tellurite glass fibers with embedded nanodiamond are attractive materials for quantum photonics applications. Reducing the loss of these fibers in the 600-800 nm wavelength range of nanodiamond fluorescence is essential to exploit the…

The eventual presence of the diamond carbon allotrope in space is discussed in numerous theoretical and experimental studies. The review summarizes the principal mechanisms of nanodiamond formation and experimental results of spectroscopic…

Earth and Planetary Astrophysics · Physics 2024-07-30 A. A. Shiryaev

Optical modulators are one of the most important elements of photonic circuits. Here, we designed, fabricated and characterized a nanophotonic all optical modulator (NOM) in silicon that is an order of magnitude smaller than any previous…

Applied Physics · Physics 2017-12-11 Apratim Majumder , Bing Shen , Randy Polson , Trisha Andrew , Rajesh Menon

We produce a set of 72 NIR through UV extinction curves by combining new HST/STIS optical spectrophotometry with existing IUE spectrophotometry (yielding gapless coverage from 1150 to 10000 Angstroms) and NIR photometry. These curves are…

Astrophysics of Galaxies · Physics 2020-01-08 Edward L. Fitzpatrick , Derck Massa , Karl D. Gordon , Ralph Bohlin , Geoffrey C. Clayton

We present CCD photometry in UBVRI of several thousand Galactic field stars in four large (>1 degree^2) regions centered on diffuse interstellar dust clouds, commonly referred to as ``cirrus'' clouds (with optical depth A_V less than…

Astrophysics · Physics 2009-10-31 Arpad Szomoru , Puragra Guhathakurta

On large cosmological scales, anisotropic gravitational collapse is manifest in the dark cosmic web. Its statistical properties are little known for alternative dark matter models such as fuzzy dark matter (FDM). In this work, we assess for…

Cosmology and Nongalactic Astrophysics · Physics 2023-08-17 Tibor Dome , Anastasia Fialkov , Nina Sartorio , Philip Mocz

In recent years, various forms of nanocrystalline diamond (NCD) have emerged as an attractive group of diamond/graphite mixed-phase materials for a range of applications from electron emission sources to electrodes for neural interfacing.…

The extinction law from ultraviolet (UV) to infrared (IR) (0.2-24 $\mu$m) is determined by relying on the blue-edge method and color excess ratios for some nearby molecular clouds, from low mass star forming region to massive star forming…

Astrophysics of Galaxies · Physics 2024-10-04 Zhetai Cao , Biwei Jiang , Shu Wang , Jun Li

High-dispersion observations of the Na I D 5890, 5896 and K I 7665, 7699 interstellar lines, and the diffuse interstellar band at 5780 Angstroms in the spectra of 32 Type Ia supernovae are used as an independent means of probing dust…

Fluorescent nanodiamonds are attracting major attention in the field of bio-sensing and biolabeling. In this work we demonstrate a robust approach to surface functionalize individual nanodiamonds with metal-phenolic networks that enhance…

Several planetary nebulae (PNe) have been found to contain both polycyclic aromatic hydrocarbon (PAH-like) species and fullerenes (C$_{60}$) distinguished by their mid-infrared emission. Previous laboratory and astronomical studies suggest…

Solar and Stellar Astrophysics · Physics 2024-02-26 M. A. Gómez-Muñoz , D. A. García-Hernández , A. Manchado , R. Barzaga , T. Huertas-Roldán

Determining the infrared extinction curve towards the Galactic centre is crucial for accurately correcting observed data and deriving the underlying stellar populations. However, extinction curves reported in the literature often show…

We have used different spectroscopic techniques to obtain a consistent quantitative absorption spectrum of a sample of meteoritic nano-diamonds in the wavelength range from the vacuum ultraviolet (0.12 $\mu$m) to the far infrared (100…

Astrophysics · Physics 2009-11-10 H. Mutschke , A. C. Andersen , C. Jaeger , Th. Henning , A. Braatz

Integration of optically-active nanodiamonds with glass fibers is a powerful method of scaling of diamond magnetic sensing functionality. We propose a novel approach for integration of nanodiamonds containing nitrogen-vacancy centers…

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