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Identifying trends between observational data and the range of physical parameters of massive stars is a critical step to the still-elusive full understanding of the source, structure, and evolution of X-ray emission from the stellar winds,…

Solar and Stellar Astrophysics · Physics 2023-08-03 Pragati Pradhan , David P. Huenemoerder , Richard Ignace , Joy S. Nichols , A. M. T. Pollock

We have determined detailed radio spectra for 26 compact sources in the starburst nucleus of M82, between 74 and 1.3 cm. Seventeen show low-frequency turnovers. One other has a thermal emission spectrum, and we identify it as an HII region.…

Astrophysics · Physics 2009-10-30 Michael L. Allen , Philipp P. Kronberg

The COMPTEL observations of the diffuse galactic 1.809 MeV emission attributed to the radioactive decay of 26Al have confirmed the diffuse nature of this interstellar emission line. One of the most significant features of the reconstructed…

Astrophysics · Physics 2007-05-23 S. Plueschke , M. Cervino , R. Diehl , K. Kretschmer , D. H. Hartmann , J. Knoedlseder

We used the Spitzer Infrared Spectrograph (IRS) to study the mid-IR properties and investigate the energetics of 24 Submillimeter Galaxies (SMGs). This is the largest sample of SMGs observed with Spitzer IRS and covers the full extent of…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-18 Karín Menéndez-Delmestre , Andrew W. Blain , Ian Smail , Dave M. Alexander , Scott C. Chapman , Lee Armus , Dave Frayer , Rob J. Ivison , Harry Teplitz

We present sub-arcsecond resolution IRAM PdBI interferometry of eight submillimeter galaxies at redshifts from 2 to 3.4, where we detect continuum at 1mm and/or CO lines at 3 and 1 mm. The CO 3-2/4-3 line profiles in five of the sources are…

In a previous paper, we assembled a collection of medium-resolution spectra of 35 carbon stars, covering optical and near-infrared wavelengths from 400 to 2400 nm. The sample includes stars from the Milky Way and the Magellanic Clouds, with…

Solar and Stellar Astrophysics · Physics 2017-05-24 A. Gonneau , A. Lançon , S. C. Trager , B. Aringer , W. Nowotny , R. F. Peletier , P. Prugniel , Y. -P. Chen , M. Lyubenova

We have selected a sample of 80 candidates for obscured radio-loud active galactic nuclei and presented their basic optical/near-infrared (NIR) properties in Paper 1. In this paper, we present both high-resolution radio continuum images for…

Astrophysics of Galaxies · Physics 2016-03-16 Ting Yan , John T. Stocke , Jeremy Darling , Emmanuel Momjian , Soniya Sharma , Nissim Kanekar

This work aims at investigating the molecular and infrared components in the massive young stellar object (MYSO) candidate IRAS 18544+0112. The purpose is to determine the nature and the origin of this infrared source. To analyze the…

Astrophysics of Galaxies · Physics 2015-05-14 M. E. Ortega , S. Paron , S. Cichowolski , M. Rubio , G. Castelletti , G. Dubner

We present spatially resolved near-IR spectroscopic observations of 15 young stars. Using a grism spectrometer behind the Keck Interferometer, we obtained an angular resolution of a few milli-arcseconds and a spectral resolution of 230,…

Astrophysics · Physics 2011-02-11 J. A. Eisner , J. R. Graham , R. L. Akeson , J. Najita

We use two catalogues, a Herschel catalogue selected at 500 mu (HerMES) and an IRAS catalogue selected at 60 mu (RIFSCz), to contrast the sky at these two wavelengths. Both surveys demonstrate the existence of extreme starbursts, with…

We present a study of the wind launching region of the Herbig Be star HD 58647 using high angular (lambda/2B=0.003") and high spectral (R=12000) resolution interferometric VLTI-AMBER observations of the near-infrared hydrogen emission line,…

The near-infrared emission lines of Fe$^{+}$ at 1.257, 1.321, and 1.644 $\mu$m share the same upper level; their ratios can then be exploited to derive the extinction to a line emitting region once the relevant spontaneous emission…

Instrumentation and Methods for Astrophysics · Physics 2016-08-10 Tommaso Pecchioli , Nicoletta Sanna , Fabrizio Massi , Ernesto Oliva

We previously observed the star-forming region G16.59$-$0.05 through interferometric observations of both thermal and maser lines, and identified a high-mass young stellar object (YSO) which is surrounded by an accretion disk and drives a…

Solar and Stellar Astrophysics · Physics 2019-02-20 Luca Moscadelli , Alberto Sanna , Riccardo Cesaroni , Victor M. Rivilla , Ciriaco Goddi , Kazi L. J. Rygl

We report the first map of large-scale (10 pc in length) emission of millimeter-wavelength hydrogen recombination lines (mm-RRLs) toward the giant H II region around the W43-Main young massive star cluster (YMC). Our mm-RRL data come from…

In this study we define a new sample of distant powerful radio galaxies in order to study their host-galaxy properties and provide targets for future observations of HI absorption with new radio telescopes and to understand the fuelling and…

Astrophysics of Galaxies · Physics 2019-09-25 Takalani Marubini , Matt J. Jarvis , Stephen Fine , Tom Mauch , Kim McAlpine , Matthew Prescott

As part of a reanalysis of galactic Asymptotic Giant Branch (AGB) stars at infrared (IR) wavelengths, we discuss a sample (357) of carbon stars for which mass loss rates, near-IR photometry and distance estimates exist. For 252 sources we…

Astrophysics · Physics 2016-08-30 R. Guandalini , M. Busso , S. Ciprini , G. Silvestro , P. Persi

We present HST/NICMOS observations with 0.1" (15 AU) resolution of six young stellar objects in the Taurus star-formation region. The targets of our survey are three Class I IRAS sources (IRAS 04016+2610, IRAS 04248+2612, and IRAS…

We present new Spitzer photometry of the Eagle Nebula (M16, containing the optical cluster NGC 6611) combined with near-infrared photometry from 2MASS. We use dust radiative transfer models, mid-infrared and near-infrared color-color…

We use a dense, complete redshift survey, the Smithsonian Hectospec Lensing Survey (SHELS), covering a 4 square degree region of a deep imaging survey, the Deep Lens Survey (DLS), to study the optical spectral properties of Wide-field…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Ho Seong Hwang , Margaret J. Geller , Michael J. Kurtz , Ian P. Dell'Antonio , Daniel G. Fabricant
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