Search Publications
Far-infrared Line Spectra of Active Galaxies from the Herschel/PACS Spectrometer: The Complete Database
Spinoglio, Luigi; Fernández-Ontiveros, Juan Antonio; Malkan, Matthew A. +3 more
We present a coherent database of spectroscopic observations of far-IR fine-structure lines from the Herschel/Photoconductor Array Camera and Spectrometer archive for a sample of 170 local active galactic nuclei (AGNs), plus a comparison sample of 20 starburst galaxies and 43 dwarf galaxies. Published Spitzer/IRS and Herschel/SPIRE line fluxes are…
Critical study of the distribution of rotational velocities of Be stars. I. Deconvolution methods, effects due to gravity darkening, macroturbulence, and binarity
Cidale, L.; Frémat, Y.; Royer, F. +9 more
Context. Among intermediate-mass and massive stars, Be stars are the fastest rotators in the main sequence (MS) and, as such, these stars are a cornerstone to validate models of structure and evolution of rotating stars. Several phenomena, however, induce under- or overestimations either of their apparent Vsini, or true velocity V.
Aims: In t…
Dissecting the High-z Interstellar Medium through Intensity Mapping Cross-correlations
Lagache, Guilaine; Doré, Olivier; Serra, Paolo
We explore the detection, with upcoming spectroscopic surveys, of three-dimensional power spectra of emission line fluctuations produced in different phases of the interstellar medium (ISM) by forbidden transitions of ionized carbon [C II] (157.7 µm), ionized nitrogen [N II] (121.9 and 205.2 µm), and neutral oxygen [O I] (145.5 µ…
Searching for Cool Dust in the Mid-to-far Infrared: The Mass-loss Histories of the Hypergiants µ Cep, VY CMa, IRC+10420, and ρ Cas
Gehrz, Robert D.; Humphreys, Roberta M.; Jones, Terry J. +6 more
We present mid- and far-IR imaging of four famous hypergiant stars: the red supergiants µ Cep and VY CMa, and the warm hypergiants IRC +10420 and ρ Cas. Our 11-37 µm SOFIA/FORCAST imaging probes cool dust not detected in visual and near-IR imaging studies. Adaptive optics 8-12 µm imaging of µ Cep and IRC +10420 with MMT/MIR…
The Orion HII Region and the Orion Bar in the Mid-infrared
Tielens, A. G. G. M.; Berné, O.; Herter, T. L. +3 more
We present mid-infrared photometry of the Orion bar obtained with the Faint Object infraRed Camera for the SOFIA Telescope (FORCAST) on board SOFIA at 6.4, 6.6, 7.7, 19.7, 31.5, and 37.1 µm. By complementing this observation with archival FORCAST and Herschel/PACS images, we are able to construct a complete infrared spectral energy distribut…
The [NII] 205 µm Emission in Local Luminous Infrared Galaxies
Gao, Yu; Lu, Nanyao; Zhao, Yinghe +9 more
In this paper, we present the measurements of the [N II] 205 µm line for a flux-limited sample of 122 (ultra-)luminous infrared galaxies [(U)LIRGs] and 20 additional normal galaxies, obtained with the Herschel Space Observatory (Herschel). We explore the far-infrared (FIR) color dependence of the [N II] 205 µm (L[N II]205 µm…
The Infrared Spectral Properties of Magellanic Carbon Stars
van Loon, J. Th.; Sahai, R.; Wood, P. R. +12 more
The Infrared Spectrograph on the Spitzer Space Telescope observed 184 carbon stars in the Magellanic Clouds. This sample reveals that the dust-production rate (DPR) from carbon stars generally increases with the pulsation period of the star. The composition of the dust grains follows two condensation sequences, with more SiC condensing before amor…
The abundance and thermal history of water ice in the disk surrounding HD 142527 from the DIGIT Herschel Key Program
Waters, L. B. F. M.; Woitke, P.; Hony, S. +9 more
Context. The presence or absence of ice in protoplanetary disks is of great importance to the formation of planets. By enhancing solid surface density and increasing sticking efficiency, ice catalyzes the rapid formation of planetesimals and decreases the timescale of giant planet core accretion.
Aims: In this paper, we analyze the compositio…
Star Formation in 3CR Radio Galaxies and Quasars at z < 1
Wilkes, Belinda J.; Willner, S. P.; Haas, Martin +8 more
Using the Herschel Space Observatory we have observed a representative sample of 87 powerful 3CR sources at redshift z\lt 1. The far-infrared (FIR, 70-500 µm) photometry is combined with mid-infrared (MIR) photometry from the Wide-Field Infrared Survey Explorer and cataloged data to analyze the complete spectral energy distributions (SEDs) o…
The ALMA detection of CO rotational line emission in AGB stars in the Large Magellanic Cloud
van Loon, J. Th.; Olofsson, H.; Sahai, R. +21 more
Context. Low- and intermediate-mass stars lose most of their stellar mass at the end of their lives on the asymptotic giant branch (AGB). Determining gas and dust mass-loss rates (MLRs) is important in quantifying the contribution of evolved stars to the enrichment of the interstellar medium.
Aims: This study attempts to spectrally resolve CO…