Search Publications
Probing the Dragonfish star-forming complex: the ionizing population of the young massive cluster Mercer 30
Herrero, A.; Urbaneja, M. A.; Najarro, F. +11 more
It has recently been claimed that the nebula, Dragonfish, is powered by a superluminous but elusive OB association. However, systematic searches in near-infrared photometric surveys have found many other cluster candidates in this region of the sky. Among these, the first confirmed young massive cluster was Mercer 30, where Wolf-Rayet stars were f…
New Constraints on the Molecular Gas in the Prototypical HyLIRGs BRI1202-0725 and BRI1335-0417
Momjian, E.; Walter, F.; Riechers, D. A. +6 more
We present Karl G Jansky Very Large Array observations of CO(J=2\to 1) line emission and rest-frame 250 GHz continuum emission of the Hyper-Luminous IR Galaxies (HyLIRGs) BRI 1202-0725 (z = 4.69) and BRI 1335-0417 (z = 4.41), with an angular resolution as high as 0.″15. Our low-order CO observations delineate the cool molecular gas, the fuel for s…
A new approach to the infrared photometric study of Be stars
Chen, P. S.; Liu, J. Y.; Shan, H. G.
In this paper, we have collected data for almost all Be stars known so far (1991 sources in total) and photometrically study their infrared properties. 2MASS, WISE, IRAS and Akari data are analysed. It is shown from several two-colour diagrams that from 1 to 60 µm, infrared excesses for the majority of Be stars are mainly due to the free-fre…
Photochemistry of forbidden oxygen lines in the inner coma of 67P/Churyumov-Gerasimenko
Gunell, H.; Altwegg, K.; Fuselier, S. A. +19 more
Observations of the green and red-doublet emission lines have previously been realized for several comets. We present here a chemistry-emission coupled model to study the production and loss mechanisms of the O(1S) and O(1D) states, which are responsible for the emission lines of interest for comet 67P/Churyumov-Gerasimenko. …
Major-Merger Galaxy Pairs at Z = 0: Dust Properties and Companion Morphology
Domingue, Donovan L.; Cao, Chen; Xu, C. Kevin +4 more
We present an analysis of dust properties of a sample of close major-merger galaxy pairs selected by K s magnitude and redshift. The pairs represent the two populations of spiral-spiral (S+S) and mixed morphology spiral-elliptical (S+E). The Code Investigating GALaxy Emission software is used to fit dust models to the Two Micron All S…
Interacting parametrized post-Friedmann method
Xu, Lixin; Richarte, Martín G.
We apply the interacting parametrized post-Friedmann (IPPF) method to coupled dark energy models where the interaction is proportional to dark matter density at background level. In the first case, the dark components are treated as fluids and the growth of dark matter perturbations only feel the interaction via the modification of background quan…
The ESPAS e-infrastructure: Access to data from near-Earth space
Hapgood, Mike; Belehaki, Anna; James, Sarah +9 more
ESPAS, the ;near-Earth space data infrastructure for e-science; is a data e-infrastructure facilitating discovery and access to observations, ground-based and space borne, and to model predictions of the near-Earth space environment, a region extending from the Earth's atmosphere up to the outer radiation belts. ESPAS provides access to metadata a…
The Optical Variability of SDSS Quasars from Multi-epoch Spectroscopy. III. A Sudden UV Cutoff in Quasar SDSS J2317+0005
Prochaska, J. Xavier; Ma, Jingzhe; Malkan, Matthew A. +6 more
We have collected near-infrared to X-ray data of 20 multi-epoch heavily reddened SDSS quasars to investigate the physical mechanism of reddening. Of these, J2317+0005 is found to be a UV cutoff quasar. Its continuum, which usually appears normal, decreases by a factor 3.5 at 3000 Å, compared to its more typical bright state during an interval of 2…
Cross-correlation analysis of CMB with foregrounds for residuals
Rath, Pranati K.; Aluri, Pavan K.
In this paper, we try to probe whether a clean cosmic microwave background (CMB) map obtained from the raw satellite data using a cleaning procedure is sufficiently clean. Specifically, we study if there are any foreground residuals still present in the cleaned data using a cross-correlation statistic. Residual contamination is expected to be pres…
HST STIS Observations of the Mixing Layer in the Cat’s Eye Nebula
Toalá, Jesús A.; Guerrero, Martín A.; Chu, You-Hua +2 more
Planetary nebulae (PNe) are expected to have a ∼105 K interface layer between the ≥slant 106 K inner hot bubble and the ∼104 K optical nebular shell. The PN structure and evolution, and the X-ray emission, depend critically on the efficiency of the mixing of material at this interface layer. However, neither its lo…