Mapping local interstellar medium with diffuse interstellar bands
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00116123" target="_blank" >RIV/00216224:14310/20:00116123 - isvavai.cz</a>
Result on the web
<a href="https://academic.oup.com/mnras/article-abstract/495/2/2035/5824657" target="_blank" >https://academic.oup.com/mnras/article-abstract/495/2/2035/5824657</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/staa1112" target="_blank" >10.1093/mnras/staa1112</a>
Alternative languages
Result language
angličtina
Original language name
Mapping local interstellar medium with diffuse interstellar bands
Original language description
With the use of the data from archives, we studied the correlations between the equivalent widths of four diffuse interstellar bands (4430, 5780, 5797, 6284 A) and properties of the target stars (colour excess values, distances, and Galactic coordinates). Many different plots of the diffuse interstellar bands and their maps were produced and further analysed. There appears to be a structure in the plot of equivalent widths of 5780 angstrom DIB (and 6284 angstrom DIB) against the Galactic x-coordinate. The structure is well defined below similar to 150 m angstrom and within vertical bar x vertical bar < 250 pc, peaking around x = 170 pc. We argue that the origin of this structure is not a statistical fluctuation. Splitting the data in the Galactic longitude into several subregions improve or lower the well-known linear relation between the equivalent widths and the colour excess, which was expected. However, some of the lines of sight display drastically different behaviour. The region within 150 degrees < l < 200 degrees shows scatter in the correlation plots with the colour excess for all of the four bands with correlation coefficients R < 0.58. We suspect that the variation of physical conditions in the nearby molecular clouds could be responsible. Finally, the area 250 degrees < l < 300 degrees displays (from the statistical point of view) significantly lower values of equivalent widths than the other regions - this tells us that there is either a significant underabundance of carriers (when compared with the other regions) or that this has to be a result of an observational bias.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
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Volume of the periodical
495
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
18
Pages from-to
2035-2052
UT code for WoS article
000543015800036
EID of the result in the Scopus database
2-s2.0-85096991319