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Related papers: First science results from SOFIA/FORCAST: The mid-…

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The aromatic features in M101 were studied spectroscopically and photometrically using observations from all three instruments on the Spitzer Space Telescope. The global SED of M101 shows strong aromatic feature (commonly called PAH…

We investigate to what degree local physical and chemical conditions are related to the evolutionary status of various objects in star-forming media. rho Oph A displays the entire sequence of low-mass star formation in a small volume of…

Astrophysics of Galaxies · Physics 2017-12-20 Bengt Larsson , Rene Liseau

Using a large collection of near-infrared spectra (2.5-5.4 um) of Galactic HII regions and HII region-like objects, we perform a systematic investigation of the astronomical polycyclic aromatic hydrocarbon (PAH) features. 36 objects were…

Astrophysics of Galaxies · Physics 2015-06-18 Tamami I. Mori , Takashi Onaka , Itsuki Sakon , Daisuke Ishihara , Takashi Shimonishi , Ryou Ohsawa , Aaron C. Bell

We performed an integral field spectroscopic study for the HII galaxy IIZw70 in order to investigate the interplay between its ionized interstellar medium (ISM) and the massive star formation (SF). Observations were taken in the optical…

Astrophysics · Physics 2009-11-13 C. Kehrig , J. M. Vilchez , S. F. Sanchez , E. Telles , E. Perez-Montero , D. Martin-Gordon

In dense parts of interstellar clouds (> 10^5 cm^-3), dust & gas are expected to be in thermal equilibrium, being coupled via collisions. However, previous studies have shown that the temperatures of the dust & gas may remain decoupled even…

Solar and Stellar Astrophysics · Physics 2015-08-05 E. Koumpia , P. M. Harvey , V. Ossenkopf , F. F. S. van der Tak , B. Mookerjea , A. Fuente , C. Kramer

(Abridged) The Magellanic Clouds provide a nearby laboratory for metal-poor dwarf galaxies. The low dust abundance enhances the penetration of UV photons into the interstellar medium (ISM), resulting in a relatively larger filling factor of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 V. Lebouteiller , D. Cormier , S. C. Madden , F. Galliano , R. Indebetouw , N. Abel , M. Sauvage , S. Hony , A. Contursi , A. Poglitsch , A. Remy , E. Sturm , R. Wu

The Perseus molecular cloud complex is a ~30pc long chain of molecular clouds most well-known for the two star-forming clusters NGC1333 and IC348 and the well-studied outflow source in B5. However, when studied at mid- to far-infrared…

Astrophysics · Physics 2009-11-11 Naomi A. Ridge , Scott L. Schnee , Alyssa A. Goodman , Jonathan B. Foster

We investigate the gas dynamics and the physical properties of photodissociation regions (PDRs) in IC1396A, which is an illuminated bright-rimmed globule with internal structures created by young stellar objects. Our mapping observations of…

The Very Small Array (VSA) has been used to survey the l = 27 to 46 deg, |b|<4 deg region of the Galactic plane at a resolution of 13 arcmin. The survey consists of 44 pointings of the VSA, each with a r.m.s. sensitivity of ~90 mJy/beam.…

The equatorial ring of Supernova (SN) 1987A has been exposed to forward shocks from the SN blast wave, and it has been suggested that these forward shocks have been causing on-going destruction of dust in the ring. We obtained SOFIA FORCAST…

The infrared spectral energy distributions (SEDs) of main-sequence galaxies in the early universe (z > 4) is currently unconstrained as infrared continuum observations are time consuming and not feasible for large samples. We present…

We present scattered light images of the TW Hya disk performed with SPHERE in PDI mode at 0.63, 0.79, 1.24 and 1.62 micron. We also present H2/H3-band ADI observations. Three distinct radial depressions in the polarized intensity…

Laboratory characterization of Interplanetary Dust Particles (IDPs) collected in the lower stratosphere represents a concrete analysis of cosmic dust properties which played a fundamental role in the origin and evolution of Solar System.…

Astrophysics · Physics 2007-05-23 A. Aronica , A. Rotundi , G. Ferrini , E. Palomba , E. Zona , L. Colangeli

The traditional picture of post-starburst galaxies as dust- and gas-poor merger remnants, rapidly transitioning to quiescence, has been recently challenged. Unexpected detections of a significant ISM in many post-starbursts raise important…

With IRAM-30m/HERA, we have detected CO(2-1) gas complexes within 30 arcsec (~100 pc) from the center of M31 amounting to a minimum total mass of 4.2 x 10^4 Msol (one third of the positions are detected). Averaging the whole HERA field, we…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 A. -L. Melchior , F. Combes

We present arcsecond resolution 1.4mm observations of the high mass star forming region, Sharpless 2-157, that reveal the cool dust associated with the first stages of star formation. These data are compared with archival images at optical,…

Astrophysics of Galaxies · Physics 2015-06-04 Chian-Chou Chen , Jonathan P. Williams , Jagadheep D. Pandian

A mid-infrared (3.6-8 um) survey of the Galactic Center has been carried out with the IRAC instrument on the Spitzer Space Telescope. This survey covers the central 2x1.4 degree (~280x200 pc) of the Galaxy. At 3.6 and 4.5 um the emission is…

We present observations and models for one of these MYSO candidates, NGC3603 IRS 9A. Our goal is to investigate with infrared interferometry the structure of IRS 9A on scales as small as 200AU, exploiting the fact that a cluster of O and B…

Solar and Stellar Astrophysics · Physics 2015-05-19 S. Vehoff , C. A. Hummel , J. D. Monnier , P. Tuthill , D. E. A. Nuernberger , R. Siebenmorgen , O. Chesneau , W. J. Duschl

We present James Webb Space Telescope (JWST) Near Infrared Spectrograph (NIRSpec) and Mid-infrared Instrument (MIRI) integral-field spectroscopy of the nearby blue compact dwarf II Zw 40, which has a low metallicity of 25% of solar.…