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Neon and [C II] 158 µm Emission Line Profiles in Dusty Starbursts and Active Galactic Nuclei
Lebouteiller, Vianney; Samsonyan, Anahit; Weedman, Daniel +2 more
A sample of 379 extragalactic sources is presented that has mid-infrared, high-resolution spectroscopy from the Spitzer Infrared Spectrograph (IRS) and also spectroscopy of the [C II] 158 µm line from the Herschel Photodetector Array Camera and Spectrometer (PACS). The emission line profiles of [Ne II] 12.81 µm, [Ne III] 15.55 µm…
Dust Impact Monitor (SESAME-DIM) on board Rosetta/Philae: Millimetric particle flux at comet 67P/Churyumov-Gerasimenko
Flandes, Alberto; Krüger, Harald; Loose, Alexander +7 more
Context. The Philae lander of the Rosetta mission, aimed at the in situ investigation of comet 67P/Churyumov-Gerasimenko, was deployed to the surface of the comet nucleus on 12 November 2014 at 2.99 AU heliocentric distance. The Dust Impact Monitor (DIM) as part of the Surface Electric Sounding and Acoustic Monitoring Experiment (SESAME) on the la…
X-ray narrow emission lines from the nuclear region of NGC 1365
Page, M. J.; Branduardi-Raymont, G.; Whewell, M.
Context. NGC 1365 is a Seyfert 2 galaxy with a starburst ring in its nuclear region. In this work we look at the XMM-Newton Reflection Grating Spectrometer (RGS) data from four 2012-13, three 2007 and two 2004 observations of NGC 1365, in order to analyse and characterise in a uniform way the soft X-ray narrow-line emitting gas in the nucleus.
Ultraviolet emission lines of Si II in cool star and solar spectra
Ayres, Thomas R.; Laha, Sibasish; Ferland, Gary J. +6 more
Recent atomic physics calculations for Si II are employed within the CLOUDY modelling code to analyse Hubble Space Telescope (HST) STIS ultraviolet spectra of three cool stars, β Geminorum, α Centauri A and B, as well as previously published HST/GHRS observations of α Tau, plus solar quiet Sun data from the High Resolution Telescope and Spectrogra…
Spatially resolved dust emission of extremely metal-poor galaxies*
Li, Aigen; Armus, Lee; Helou, George +4 more
We present infrared (IR) spectral energy distributions (SEDs) of individual star-forming regions in four extremely metal-poor (EMP) galaxies with metallicity Z ≲ Z⊙/10 as observed by the Herschel Space Observatory. With the good wavelength coverage of the SED, it is found that these EMP star-forming regions show distinct SED shapes as c…
H-ATLAS: the far-infrared properties of galaxies in and around the Coma cluster
Ibar, E.; Dunne, L.; Dye, S. +12 more
We describe a far-infrared survey of the Coma cluster and the galaxy filament it resides within. Our survey covers an area of ∼150 deg2 observed by Herschel H-ATLAS (Herschel Astrophysical Terahertz Large Area Survey) in five bands at 100, 160, 250, 350 and 500 µm. The SDSS spectroscopic survey (mr ≤ 17.8) is used to de…
Evidence for variable, correlated X-ray and optical/IR extinction towards the nearby, pre-main-sequence binary TWA 30
Kastner, J. H.; Alcalá, J. M.; Principe, David A. +2 more
We present contemporaneous XMM-Newton X-ray and ground-based optical/near-IR spectroscopic observations of the nearby (D ≈ 42 pc), low-mass (mid-M) binary system TWA 30A and 30B. The components of this wide (separation ∼3400 au) binary are notable for their nearly edge-on disc viewing geometries, high levels of variability, and evidence for collim…
A tale of two tails: exploring stellar populations in the tidal tails of NGC 3256
Gronwall, Caryl; Ciardullo, Robin; Charlton, Jane +7 more
We have developed an observing programme using deep, multiband imaging to probe the chaotic regions of tidal tails in search of an underlying stellar population, using NGC 3256's 400 Myr twin tidal tails as a case study. These tails have different colours of u - g = 1.05 ± 0.07 and r - I = 0.13 ± 0.07 for NGC 3256W, and u - g = 1.26 ± 0.07 and r -…
Results from DROXO. IV. EXTraS discovery of an X-ray flare from the Class I protostar candidate ISO-Oph 85
Salvaterra, R.; Haberl, F.; Tiengo, A. +15 more
X-ray emission from young stellar objects (YSOs) is a key ingredient in understanding star formation. For the early, protostellar (Class I) phase, a very limited (and controversial) quantity of X-ray results is available to date. Within the EXTraS (Exploring the X-ray Transient and variable Sky) project, we have discovered transient X-ray emission…
The Broken Lane of a Type II Radio Burst Caused by Collision of a Coronal Shock with a Flare Current Sheet
Lin, Jun; Wang, Min; Gao, Guannan +3 more
We investigated a peculiar metric type II solar radio burst with a broken lane structure that was observed on November 13, 2012. In addition to the radio data, we also studied the data in other wavelengths. The bursts were associated with two coronal mass ejections (CMEs) and two flares that originated from Active Region AR 11613. A long current s…