20.500.12556/RUL-147271 The GALAH survey new diffuse interstellar bands found in residuals of 872 000 stellar spectra We use more than 872 000 mid- to high-resolution (R ∼ 20 000) spectra of stars from the GALactic Archaeology with HERMES (GALAH) survey to discern the spectra of diffuse interstellar bands (DIBs). We use four windows with the wavelength ranges 4718–4903, 5649–5873, 6481–6739, and 7590–7890 Å, giving a total coverage of 967 Å. We produce ∼400 000 spectra of interstellar medium (ISM) absorption features and correct them for radial velocities of the DIB clouds. Ultimately, we combine the 33 115 best ISM spectra into six reddening bins with a range of 0.1 < E(B − V) < 0.7 mag. A total of 183 absorption features in these spectra qualify as DIBs, and their fitted model parameters are summarized in a detailed catalogue. From these, 64 are not reported in the literature, of which 17 are certain, 14 are probable and 33 are possible. We find that the broad DIBs can be fitted with a multitude of narrower DIBs. Finally, we create a synthetic DIB spectrum at unit reddening. This should allow us to narrow down the possible carriers of DIBs, to explore the composition of the ISM, and ultimately to model dust and star formation better as well as to correct Galactic and extragalactic observations. The majority of certain DIBs show a significant excess of equivalent width when compared with reddening. We explain this with observed lines of sight penetrating more uniform DIB clouds compared with clumpy dust clouds. catalogues spectroscopic surveys methods data analysis surveys dust extinction true false true Angleški jezik Ni določen Članek v reviji 2023-06-28 11:47:22 2023-06-28 11:47:22 2024-03-06 15:47:59 0000-00-00 00:00:00 2023 0 0 Str. 3727-3748 iss. 3 Vol. 521 May 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 524.3 1365-2966 10.1093/mnras/stad678 152621827 stad678.pdf stad678.pdf 1 F4DF3D3FAD4B6559564A20458D9B9511 0fe7f73a399ee70b536b4654c41fa796361ca159e71f03b3b111bbd4318706aa bc2298b3-1598-11ee-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=170795 https://academic.oup.com/mnras/article/521/3/3727/7085973 0 91f04ab8-1598-11ee-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=170794 Fakulteta za matematiko in fiziko 0 0 0