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We present a set of 6-12 micron ISOPHOT-S spectra of the general interstellar medium of the Milky Way. This part of the spectrum is dominated by a series of strong, wide emission features commonly called the Unidentified Infrared Bands. The…

天体物理学 · 物理学 2009-11-07 J. Kahanpaa , K. Mattila , K. Lehtinen , C. Leinert , D. Lemke

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…

Published interpretations of the relative intensity variations of the Unidentified Infrared Bands (UIBs) and their underlying continuum are discussed. An alternative model is proposed, in which a single carrier for both emits a) mostly a…

天体物理学 · 物理学 2009-11-10 Renaud Papoular

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

The gross features in the distribution of stars as well as warm (T >~ 100 K) interstellar dust in the Galactic disk have been investigated using the recent mid infrared survey by Midcourse Space Experiment (MSX) at 8, 12, 14 & 21 micron…

天体物理学 · 物理学 2009-11-10 S. Vig , S. K. Ghosh , D. K. Ojha

The Cosmic Infrared Background (CIB) is hidden behind veils of foreground emission from our own solar system and Galaxy. This paper describes procedures for removing the Galactic IR emission from the 1.25 - 240 micron COBE DIRBE maps as…

The spectrum of the unidentified infrared (UIR) emission bands between 5.9 and 11.7 [micro]m has been observed for the first time in the disk of an external galaxy. We have used the low-resolution spectrometer of the ISOPHOT instrument…

天体物理学 · 物理学 2007-05-23 K. Mattila , K. Lehtinen , D. Lemke

We present an inventory of mid-infrared spectral features detected in high resolution 2.4 to 45um ISO-SWS spectra of the galaxies M82, NGC253, Circinus, NGC1068, and the 30Doradus region of the LMC. We discuss their identifications and…

天体物理学 · 物理学 2009-10-05 E. Sturm , D. Lutz , D. Tran , H. Feuchtgruber , R. Genzel , D. Kunze , A. F. M. Moorwood , M. D. Thornley

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 the analysis of the Unidentified Infrared Bands (UIB) in the starburst galaxy NGC 1097. We have combined spectral maps observed with the AKARI/IRC and Spitzer/IRS instruments, in order to study all of the most prominent UIBs,…

星系天体物理 · 物理学 2018-02-01 Ronin Wu , Frédéric Galliano , Takashi Onaka

We present mid-infrared to optical properties of 22 representative irregular galaxies: 18 Im, 3 BCDs, and one Sm. The mid-IR is based on images from the Spitzer Space Telescope archives. The 3.6 and 4.5 micron bands and the UBVJHK images…

天体物理学 · 物理学 2008-11-26 Deidre A. Hunter , Bruce G. Elmegreen , Emily Martin

We present visible and near IR images of the compact HII region Sh 152. Some of these images reveal the presence of Extended Red Emission (ERE) around 698 nm and emission from Unidentified Infra Red Bands (UIRBs) at 3.3 and 6.2 micron.…

天体物理学 · 物理学 2007-05-23 S. Darbon , A. Zavagno , C. Savine , V. Ducci , J. -M. Perrin , J. -P. Sivan

The diffuse interstellar bands (DIBs) are absorption lines observed in visual and near infrared spectra of stars. Understanding their origin in the interstellar medium (ISM) is one of the oldest problems in astronomical spectroscopy, as…

We present mid-IR 21micron images of a sample of radio selected Ultracompact HII (UCHII) regions, obtained with the Midcourse Space Experiment (MSX). All, with one possible exception, are detected at mid-IR wavelengths, sampling the warm…

天体物理学 · 物理学 2009-11-07 Paul A. Crowther , Peter S. Conti

Diffuse Interstellar Bands (DIBs) are non-stellar weak absorption features of unknown origin found in the spectra of stars viewed through one or several clouds of Interstellar Medium (ISM). Research of DIBs outside the Milky Way is…

We have identified 41 infrared dark clouds from the 8 micron maps of the Midcourse Space Experiment (MSX), selected to be found within one square degree areas centered on known ultracompact HII regions. We have mapped these infrared dark…

ISOCAM extragalactic mid-infrared deep surveys have detected a population of strong IR emitters ten times more numerous than expected if there were no evolution from z<0.2 (IRAS) up to the maximum redshift of these galaxies (z=1.5). The…

天体物理学 · 物理学 2007-05-23 D. Elbaz , H. Aussel , C. J. Cesarsky , F. X. Desert , D. Fadda , A. Franceschini , M. Harwit , J. L. Puget , J. L. Starck

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

The spectrum of any star viewed through a sufficient quantity of diffuse interstellar material reveals a number of absorption features collectively called diffuse interstellar bands (DIBs). The first DIBs were reported 90 years ago, and…

星系天体物理 · 物理学 2015-06-03 T. R. Geballe , F. Najarro , D. F. Figer , B. W. Schlegelmilch , D. de la Fuente

The mid-infrared emission from 18 nearby galaxies imaged with the IRAC instrument on Spitzer Space Telescope samples the spatial distributions of the reddening-free stellar photospheric emission and the warm dust in the ISM. These two…

天体物理学 · 物理学 2009-11-10 M. A. Pahre , M. L. N. Ashby , G. G. Fazio , S. P. Willner
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