Search Publications
HST/WFC3 imaging of protostellar jets in Carina: [Fe II] emission tracing massive jets from intermediate-mass protostars
Smith, Nathan; Reiter, Megan
We present narrow-band Wide Field Camera 3 (WFC3)-UVIS and WFC3-IR images of four externally irradiated protostellar jets in the Carina nebula: HH 666, HH 901, HH 902 and HH 1066. These massive jets are unusual because they are bathed in UV radiation from dozens of nearby O-type stars, but despite the strong incident ionizing radiation, portions o…
INTEGRAL and XMM-Newton observations of IGR J16418-4532: evidence of accretion regime transitions in a supergiant fast X-ray transient
Hill, A. B.; Sidoli, L.; Bird, A. J. +5 more
We report on combined INTEGRAL and XMM-Newton observations of the supergiant fast X-ray transient (SFXT) IGR J16418-4532. The observations targeted the X-ray eclipse region of IGR J16418-4532's orbit with continuous INTEGRAL observations across ∼25 per cent of orbital phase and two quasi-simultaneous XMM-Newton observations of length 20 and 14 ks,…
Far- and mid-infrared spectroscopy of complex organic matter of astrochemical interest: coal, heavy petroleum fractions and asphaltenes
García-Hernández, D. A.; Manchado, Arturo; Cataldo, Franco
The coexistence of a large variety of molecular species (i.e. aromatic, cycloaliphatic and aliphatic) in several astrophysical environments suggests that unidentified infrared emission (UIE) occurs from small solid particles containing a mix of aromatic and aliphatic structures (e.g. coal, petroleum, etc.), renewing the astronomical interest on th…
Dust-obscured star formation in the outskirts of XMMU J2235.3-2557, a massive galaxy cluster at z = 1.4
Böhringer, H.; Berta, S.; Lutz, D. +17 more
Star formation (SF) in the galaxy populations of local massive clusters is reduced with respect to field galaxies, and tends to be suppressed in the core region. Indications of a reversal of the SF-density relation have been observed in a few z > 1.4 clusters. Using deep imaging from 100-500 µm from Photodetector Array Camera and Spectrom…
Lyα luminosity functions at redshift z ≈ 4.5
Finkelstein, Steven L.; Tilvi, Vithal; Zheng, Zhen-Ya +7 more
We present a spectroscopically confirmed sample of Lyman α emitting galaxies (LAEs) at z ∼ 4.5 in the Extended Chandra Deep Field-South (ECDFS), which we combine with a sample of z ∼ 4.5 LAEs from previous narrow-band surveys from the Large Area Lyman Alpha (LALA) survey to build a unified Lyα luminosity function. We spectroscopically observed 64 …
X-ray and radio observations of the magnetar Swift J1834.9-0846 and its dust-scattering halo
Tiengo, A.; Götz, D.; Mereghetti, S. +13 more
We present a long-term study of the 2011 outburst of the magnetar Swift J1834.9-0846 carried out using new Chandra observations, as well as all the available Swift, RXTE and XMM-Newton data. The last observation was performed on 2011 November 12, about 100 d after the onset of the bursting activity that had led to the discovery of the source on 20…
Herschel limits on far-infrared emission from circumstellar dust around three nearby type Ia supernovae.
Amanullah, R.; Goobar, A.; Johansson, J.
We report upper limits on dust emission at far-infrared (IR) wavelengths from three nearby Type Ia supernovae: SNe 2011by, 2011fe and 2012cg. Observations were carried out at 70 and 160 µm with the Photodetector Array Camera and Spectrometer onboard the Herschel Space Observatory. None of the supernovae were detected in the far-IR, allowing …
Polycyclic aromatic hydrocarbons in spatially resolved extragalactic star-forming complexes
Wiebe, D. S.; Boley, P. A.; Khramtsova, M. S. +1 more
The abundance of polycyclic aromatic hydrocarbons (PAHs) in low- and high-metallicity galaxies has been widely discussed since the time when detailed infrared data for extragalactic objects were first obtained. On the scales of entire galaxies, a smaller PAH abundance in lower metallicity galaxies is often observed. We study this relationship for …
The ALHAMBRA survey: reliable morphological catalogue of 22 051 early- and late-type galaxies
Cepa, J.; Infante, L.; Molino, A. +29 more
Advanced Large Homogeneous Area Medium Band Redshift Astronomical (ALHAMBRA) is photometric survey designed to trace the cosmic evolution and cosmic variance. It covers a large area of ∼4 deg2 in eight fields, where seven fields overlap with other surveys, allowing us to have complementary data in other wavelengths. All observations wer…
A wind-shell interaction model for multipolar planetary nebulae
López, J. A.; Steffen, W.; Koning, N. +4 more
We explore the formation of multipolar structures in planetary and pre-planetary nebulae from the interaction of a fast post-asymptotic giant branch wind with a highly inhomogeneous and filamentary shell structure assumed to form during the final phase of the high-density wind. The simulations were performed with a new hydrodynamics code integrate…