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We are conducting a study on the imprint of the ISM on optical spectra based on two types of ongoing spectroscopic massive-star surveys: on the one hand, intermediate-resolution (R = 2500) green-blue spectra for ~3000 stars obtained with…

星系天体物理 · 物理学 2012-10-09 M Penadés Ordaz , J. Maíz Apellániz , A. Sota

We are using five different surveys to compile the largest sample of diffuse interstellar band (DIB) measurements ever collected. GOSSS is obtaining intermediate-resolution blue-violet spectroscopy of ~2500 OB stars, of which 60% have…

星系天体物理 · 物理学 2015-06-16 J. Maíz Apellániz , A. Sota , R. H. Barbá , N. I. Morrell , A. Pellerin , E. J. Alfaro , S. Simón-Díaz

Using over a million and a half extragalactic spectra we study the properties of the mysterious Diffuse Interstellar Bands (DIBs) in the Milky Way. These data provide us with an unprecedented sampling of the skies at high Galactic-latitude…

星系天体物理 · 物理学 2015-06-22 Dalya Baron , Dovi Poznanski , Darach Watson , Yushu Yao , J. Xavier Prochaska

A large number of interstellar absorption features at ~ 4000\AA\ -- 1.8 {\mu}m, known as the "diffuse interstellar bands" (DIBs), remains unidentified. Most recent works relate them to large polycyclic aromatic hydrocarbon (PAH) molecules…

星系天体物理 · 物理学 2017-01-25 F. Y. Xiang , Aigen Li , J. X. Zhong

Diffuse interstellar bands (DIBs) are broad absorption features measured in sightlines probing the diffuse interstellar medium. Although large carbon-bearing molecules have been proposed as the carriers producing DIBs, their identity…

星系天体物理 · 物理学 2018-12-05 M. C. Ramírez-Tannus , N. L. J. Cox , L. Kaper , A. de Koter

ABRIDGED: Diffuse interstellar bands (DIBs) are faint spectral absorption features of unknown origin. Research on DIBs beyond the Local Group (LG) will surely blossom in the era of the ELTs. A possibility that needs to be explored is the…

星系天体物理 · 物理学 2018-07-18 Ana Monreal-Ibero , Peter M. Weilbacher , Martin Wendt

We present a new database of 5780.5 and 6283.8 {\AA} DIB measurements and also study their correlation with the reddening. The database is based on high-resolution, high-quality spectra of early-type nearby stars located in the southern…

星系天体物理 · 物理学 2015-06-05 Séverine Raimond , Rosine Lallement , Jean-Luc Vergely , Carine Babusiaux , Laurent Eyer

We have detected a broad interstellar absorption band centred close to 7700 \r{A} and with a FWHM of 176.6$\pm$3.9 \r{A}. This is the first such absorption band detected in the optical range and is significantly wider than the numerous…

星系天体物理 · 物理学 2021-01-13 J. Maíz Apellániz , R. H. Barbá , J. A. Caballero , R. C. Bohlin , C. Fariña

Diffuse interstellar bands (DIBs) hold a lot of information about the state and the structure of the ISM. Structure can most directly be observed by extensive spectroscopic surveys, including surveys of stars where DIBs are especially…

星系天体物理 · 物理学 2017-05-10 Janez Kos

We map the distribution and properties of the Milky Way's interstellar medium as traced by diffuse interstellar bands (DIBs) detected in near-infrared stellar spectra from the SDSS-III/APOGEE survey. Focusing exclusively on the strongest…

We used 3D maps of 862nm DIB equivalent width (EW) and extinction, DIB catalogues, and measured parameters of dust extinction law and dust emission to study relationships between DIB and extinction level, total-to-selective extinction ratio…

星系天体物理 · 物理学 2024-10-30 R. Lallement , J. L. Vergely , N. L. J. Cox

The carriers of the still (mostly) unidentified diffuse interstellar bands (DIBs) have been a long-standing mystery ever since their first discovery exactly 100 years ago. In recent years, the ubiquitous detection of a large number of DIBs…

星系天体物理 · 物理学 2019-10-02 Kaijun Li , Aigen Li , F. Y. Xiang

I present results on the interstellar medium towards the O stars observed in five optical spectroscopic surveys: GOSSS, OWN, IACOB, NoMaDS, and CAF\'E-BEANS. I have measured both the amount [$E(4405-5495)$] and type [$R_{5495}$] of…

星系天体物理 · 物理学 2015-09-01 J. Maíz Apellániz

[ABRIDGED] Context. O stars are excellent tracers of the intervening ISM because of their high luminosity, blue intrinsic SED, and relatively featureless spectra. We are currently conducting GOSSS, which is generating a large sample of O…

星系天体物理 · 物理学 2018-05-16 J. Maíz Apellániz , R. H. Barbá

Using over a million and a half extragalactic spectra we study the correlations of the Diffuse Interstellar Bands (DIBs) in the Milky Way. We measure the correlation between DIB strength and dust extinction for 142 DIBs using 24 stacked…

星系天体物理 · 物理学 2015-08-06 Dalya Baron , Dovi Poznanski , Darach Watson , Yushu Yao , Nick L. J. Cox , J. Xavier Prochaska

In this brief review of recent work relating the DIBs to other gas-phase constituents of the ISM, we explore correlations between DIB equivalent widths and the column densities of various atomic and molecular species, drawn from a large…

星系天体物理 · 物理学 2015-06-16 Daniel E. Welty

We study how diffuse interstellar bands (DIBs) measured toward distance-distributed target stars can be used to locate dense interstellar (IS) clouds in the Galaxy and probe a line-of-sight (LOS) kinematical structure, a potential useful…

It is well known that interstellar spectral features correlate with color excess E(B$-$V). This suggests that measuring intensities of these features allows one to estimate reddening of stars. The aim of this paper is to check how tight…

星系天体物理 · 物理学 2019-08-01 J. Krelowski , G. Galazutdinov , V. Godunova , A. Bondar

Diffuse interstellar bands (DIBs) are absorption features seen in optical and infrared spectra of stars that are probably caused by large and complex molecules in the ISM. Here we investigate the Galactic distribution and properties of two…

Diffuse interstellar bands (DIBs) are common interstellar absorption features in spectroscopic observations but their origins remain unclear. DIBs play an important role in the life cycle of the interstellar medium (ISM) and can also be…

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