The Optical–Mid-infrared Extinction Law of the l = 165° Sightline in the Galactic Plane: Diversity of the Extinction Law in the Diffuse Interstellar Medium

Wang, Shu; Jiang, Biwei; Zhao, H.; Chen, Xiaodian; Grijs, Richard de

doi:10.3847/1538-4357/aa8db7

Cited by 32 publications

(32 citation statements)

References 65 publications

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“…The dispersion of the absolute magnitude in the K S band is about 0.03 mag, and the dispersion of the near-infrared (IR) color index J − K S is about 0.02 mag (López-Corredoira et al 2002). RCs are widely adopted to trace interstellar extinction as they can be easily distinguished in the color-magnitude diagram (CMD; Indebetouw et al 2005;Nishiyama et al 2006;Gao et al 2009;Wang et al 2017;Wang & Chen 2019). With the known extinction of a target, its distance can be derived by measuring the distribution of extinction along the distance towards the sightline.…”

Section: Introductionmentioning

confidence: 99%

“…In a few cases, there are significant outliers that are removed in determining the spline interpolation curves.4 In the solar neighborhood, the average extinction rate in the V band is 0.7-1.0 mag kpc −1(Gottlieb & Upson 1969;Milne & Aller 1980) Wang et al (2017). estimated the average rate to be 0.37 mag kpc −1 towards a very diffuse region in the Galactic plane Wang & Chen (2019).…”

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confidence: 99%

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Distances to the supernova remnants in the inner disk

Wang

Zhang

Jiang

et al. 2020

A&A

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Context. Distance measurements of supernova remnants (SNRs) are essential as accurate estimates of physical size, dust masses, and some other properties of SNRs depend critically on accurate distance measurements. However, the determination of SNR distances is still a tough task. Aims. Red clump stars (RCs) have a long history of being used as standard candles. In this work, we take RCs as tracers to determine the distances to a large group of SNRs in the inner disk. Methods. We first selected RC stars based on the near-infrared (IR) color-magnitude diagram. Then the distance to and extinction of RC stars were calculated. To extend the measurable range of distance, we combined near-IR photometric data from the 2MASS survey with the deeper UKIDSS and VVV surveys. With the help of the Gaia parallaxes, we also removed contaminants, including dwarfs and giants. Because an SN explosion compresses the surrounding interstellar medium, the SNR region would become denser and exhibit higher extinction than the surroundings. The distance of an SNR is then recognized by the position where the extinction and its gradient is higher than that of the ambient medium. Results. A total of 63 SNRs distances in the Galactic inner disk were determined and divided into three Levels A, B, and C with decreasing reliability. The distances to 43 SNRs are well determined with reliability A or B. The diameters and dust masses of SNRs were estimated with the obtained distance and extinction.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Distances to the supernova remnants in the inner disk

Wang

Zhang

Jiang

et al. 2020

A&A

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“…]. As shown by Wang & Chen (2019), fitting results can significantly change depending on the methods employed, and we therefore checked how the values of a 0 and a 1 vary for different methods. In addition to the OLS method, we tried Standard Major Axis (SMA) method and Deming Method (DM).…”

Section: Color Excess Ratiomentioning

confidence: 99%

Optical Properties of Interstellar Dust around the Orion A Molecular Cloud

Uehara,

Dobashi,

Nishiura

et al. 2021

Preprint

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We have studied optical properties of interstellar dust around the Orion A molecular cloud to investigate the size distribution and the composition of dust grains. Orion A is one of the most studied molecular clouds in the solar vicinity (d ≃ 400 pc). In this paper, we used optical and near-infrared photometric data. The optical data were obtained by BV RI bands imaging observations. The near-infrared data consisting of JHK S bands were taken from 2MASS point source catalog. We produced some color excess maps around Orion A, and measured their ratios such as E(R − I)/E(B − V ). In order to investigate dust properties, we compared the observed ratios with results of simulation performed by Naoi T. et al. ( 2021) who calculated the extinction in the optical to near-infrared wavelengths based on a standard dust model; they assumed a power-law grain-size distribution with an upper cutoff radius and assumed graphite and silicate as dominant components. As a result, we found that the upper cutoff radius around Orion A is ≃ 0.3 µm, and silicate predominates compared with graphite (with the fraction of silicate grater than 93 %). In addition, we further derived the total-to-selective extinction ratio R V from the observed extinction of A V and the color excess E(B − V ), and compared it with the model calculations. Dust properties (i.e., the upper cutoff radius and the ratio of graphite/silicate) derived from R V is almost consistent with those derived from the color excess ratios.

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“…It appears that these directions offer low-extinction windows, reaching and even crossing the Perseus Arm. These areas are known as diffuse regions (Wang et al 2017, their Figure 1). In other directions, the extinction increases quickly and the largest visible distance from the Sun is small.…”

Section: Mapping the Galactic Thin Disk Structure With Ew Typesmentioning

confidence: 99%

Eclipsing Binary Populations across the Northern Galactic Plane from the KISOGP survey

Ren,

de Grijs,

Zhang

et al. 2021

Preprint

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We present a catalog of eclipsing binaries in the northern Galactic Plane from the Kiso Wide-Field Camera Intensive Survey of the Galactic Plane (KISOGP). We visually identified 7055 eclipsing binaries spread across ∼330 square degrees, including 4197 W Ursa Majoris/EW-, 1458 β Lyrae/EB-, and 1400 Algol/EA-type eclipsing binaries. For all systems, I-band light curves were used to obtain accurate system parameters. We derived the distances and extinction values for the EW-type objects from their period-luminosity relation. We also obtained the structure of the thin disk from the distribution of our sample of eclipsing binary systems, combined with those of high-mass star-forming regions and Cepheid tracers. We found that the thin disk is inhomogeneous in number density as a function of Galactic longitude. Using this new set of distance tracers, we constrain the detailed structure of the thin disk. Finally, we report a global parallax zero-point offset of ∆π = −42.1 ± 1.9 (stat.) ± 12.9(syst.) µas between our carefully calibrated EW-type eclipsing binary positions and those provided by Gaia Early Data Release 3. Implementation of the officially recommended parallax zero-point correction results in a significantly reduced offset. Additionally, we provide a photometric characterization of our EW-type eclipsing binaries that can be applied to further analyses.

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The Optical–Mid-infrared Extinction Law of the l = 165° Sightline in the Galactic Plane: Diversity of the Extinction Law in the Diffuse Interstellar Medium

Cited by 32 publications

References 65 publications

Distances to the supernova remnants in the inner disk

Distances to the supernova remnants in the inner disk

Optical Properties of Interstellar Dust around the Orion A Molecular Cloud

Eclipsing Binary Populations across the Northern Galactic Plane from the KISOGP survey

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