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We analyze JWST NIRSpec$+$MIRI/MRS observations of the infrared (IR) gas-phase molecular bands of the most enshrouded source (D1) within the interacting system and luminous IR galaxy II Zw 096. We report the detection of rovibrational lines…

The hydroxyl radical (OH) is found in various environments within the interstellar medium (ISM) of the Milky Way and external galaxies, mostly either in diffuse interstellar clouds or in the warm, dense environments of newly formed low-mass…

Aims. We use different tracers, such as Ha, ultraviolet (UV), and infrared (IR) emissions at various wavelengths, to study the dust and star-formation (SF) conditions throughout the disk of M33. Methods. We derive the radial distribution of…

Astrophysics · Physics 2009-11-13 S. Verley , E. Corbelli , C. Giovanardi , L. K. Hunt

Understanding the formation of substructures in protoplanetary disks is vital for gaining insights into dust growth and the process of planet formation. Studying these substructures in highly embedded Class 0 objects using the Atacama Large…

Arcuate infrared nebulae are ubiquitous throughout the Galactic Plane and are candidates for partial shells, bubbles, or bowshocks produced by massive runaway stars. We tabulate infrared photometry for 709 such objects using images from the…

IRAS 17256-3631 is a southern Galactic massive star forming region located at a distance of 2 kpc. In this paper, we present a multiwavelength investigation of the embedded cluster, the HII region, as well as the parent cloud. Radio images…

Astrophysics of Galaxies · Physics 2016-01-27 V. S. Veena , S. Vig , A. Tej , W. P. Varricatt , S. K. Ghosh , T. Chandrasekhar , N. M. Ashok

We aim at determining the spatial distribution of the gas and dust in star-forming regions and address their relative abundances in quantitative terms. We also examine the dust opacity exponent beta for spatial and/or temporal variations.…

Astrophysics of Galaxies · Physics 2015-04-24 R. Liseau , B. Larsson , T. Lunttila , M. Olberg , G. Rydbeck , P. Bergman , K. Justtanont , G. Olofsson , B. L. de Vries

We present an analysis of the IRAS 08589-4714 star-forming region. This region harbors candidate young stellar objects identified in the WISE and Herschel images using color index criteria and spectral energy distributions (SEDs). The SEDs…

Solar and Stellar Astrophysics · Physics 2016-09-06 H. P. Saldaño , J. Vásquez , M. Gómez , C. E. Cappa , N. U. Duronea , M. Rubio

The BN/KL region of the Orion Nebula is the nearest region of high mass star formation in our galaxy. As such, it has been the subject of intense investigation at a variety of wavelengths, which have revealed it to be brightest in the…

We study centimeter continuum emission of eight high- and intermediate-mass protostars that are part of the SOFIA Massive (SOMA) Star Formation Survey, thus building extended spectral energy distributions (SEDs) from the radio to the…

Solar and Stellar Astrophysics · Physics 2019-03-06 V. Rosero , K. E. I. Tanaka , J. C. Tan , J. Marvil , M. Liu , Y. Zhang , J. M. De Buizer , M. T. Beltrán

We present a model for the diffuse interstellar dust that explains the observed wavelength-dependence of extinction, emission, linear and circular polarisation of light. The model is set-up with a small number of parameters. It consists of…

Astrophysics of Galaxies · Physics 2015-06-16 R. Siebenmorgen , N. V. Voshchinnikov , S. Bagnulo

We have collected one-dimensional raster-scan observations of the active star-forming region Sharpless 171 (S171), a typical HII region-molecular cloud complex, with the three spectrometers (LWS, SWS, and PHT-S) on board ISO. We have…

Astrophysics · Physics 2009-11-10 Y. Okada , T. Onaka , H. Shibai , Y. Doi

We report spectra obtained with the Spitzer Space Telescope in the wavelength range between 14 microns and 35 microns of 19 nearby main-sequence stars with infrared excesses. The six stars with strong dust emission show no recognizable…

Large-scale dust heating and cooling in the diffuse medium of M31 is studied using the HiRes IRAS maps in conjunction with UV, optical (UBV) and the HI maps. A dust heating/cooling model is developed based on a radiative transfer model…

Astrophysics · Physics 2009-10-28 Cong Xu , George Helou

This paper utilizes the JWST MIRI multi-band imaging data from the SMILES survey (5-25micron), complemented with HST and NIRCam photometric and spectroscopic data from the JADES and FRESCO surveys for 443 star-forming (non-AGN) galaxies at…

We report on resolved interferometric observations with VLTI/MIDI of the massive young stellar object (MYSO) W33A. The MIDI observations deliver spectrally dispersed visibilities with values between 0.03 and 0.06, for a baseline of 45m over…

Astrophysics · Physics 2009-11-13 W. J. de Wit , M. G. Hoare , R. D. Oudmaijer , J. C. Mottram

The Palomar Integral Field Spectrograph was used to probe a variety of environments in nine nearby galaxies that span a range of morphological types, luminosities, metallicities, and infrared-to-blue ratios. For the first time,…

Episodic accretion plays an important role in the evolution of young stars. Although it has been under investigation for a long time, the origin of such episodic accretion events is not yet understood. We investigate the dust and gas…

Solar and Stellar Astrophysics · Physics 2019-10-16 Andreas Postel , Marc Audard , Eduard Vorobyov , Odysseas Dionatos , Christian Rab , Manuel Güdel

Infrared emission from the dust shell around IRC+10216 is analysed in detail, employing a self-consistent model for radiatively driven winds around late-type stars that couples the equations of motion and radiative transfer in the dust. The…

Astrophysics · Physics 2015-06-24 Zeljko Ivezic , Moshe Elitzur

W5-E has been observed with the Herschel-PACS and -SPIRE photometers, at 100, 160, 250, 350, and 500 microns. The dust temperature map shows a rather uniform temperature, in the range 17.5-20 K in the dense condensations or filaments, 21-22…

Astrophysics of Galaxies · Physics 2015-06-11 L. Deharveng , A. Zavagno , L. D. Anderson , F. Motte , A. Abergel , Ph. Andre , S. Bontemps , G. Leleu , H. Roussel , D. Russeil