Search Publications
The Grism Lens-Amplified Survey from Space (GLASS). VIII. The Influence of the Cluster Properties on Hα Emitter Galaxies at 0.3 < z < 0.7
Pentericci, Laura; Schmidt, Kasper B.; Treu, Tommaso +13 more
Exploiting the data of the Grism Lens-Amplified Survey from Space (GLASS), we characterize the spatial distribution of star formation in 76 highly active star-forming galaxies in 10 clusters at 0.3< z< 0.7. All of these galaxies are likely restricted to first infall. In a companion paper, we contrast the properties of field and cluster galax…
Solar Ellerman Bombs in 1D Radiative Hydrodynamics
Doyle, J. G.; Mathioudakis, M.; Reid, A. +2 more
Recent observations from the Interface Region Imaging Spectrograph appear to show impulsive brightenings in high temperature lines, which when combined with simultaneous ground-based observations in Hα, appear co-spatial to Ellerman Bombs (EBs). We use the RADYN one-dimensional radiative transfer code in an attempt to try and reproduce the observe…
Stripped Elliptical Galaxies as Probes of ICM Physics. III. Deep Chandra Observations of NGC 4552: Measuring the Viscosity of the Intracluster Medium
Churazov, E.; Forman, W. R.; Nulsen, P. E. J. +7 more
We present results from a deep (200 ks) Chandra observation of the early-type galaxy NGC 4552 (M89), which is falling into the Virgo cluster. Previous shallower X-ray observations of this galaxy showed a remnant gas core, a tail to the South of the galaxy, and twin “horns” attached to the northern edge of the gas core. In our deeper data, we detec…
Corotating Magnetic Reconnection Site in Saturn’s Magnetosphere
Lewis, G. R.; Coates, A. J.; Dougherty, M. K. +12 more
Using measurements from the Cassini spacecraft in Saturn’s magnetosphere, we propose a 3D physical picture of a corotating reconnection site, which can only be driven by an internally generated source. Our results demonstrate that the corotating magnetic reconnection can drive an expansion of the current sheet in Saturn’s magnetosphere and, conseq…
Pressure Profiles of Distant Galaxy Clusters in the Planck Catalogue
Bourdin, H.; Mazzotta, P.; Vikhlinin, A. +2 more
Successive releases of Planck data have demonstrated the strength of the Sunyaev-Zeldovich (SZ) effect in detecting hot baryons out to the galaxy cluster peripheries. To infer the hot gas pressure structure from nearby galaxy clusters to more distant objects, we developed a parametric method that models the spectral energy distribution and spatial…
Diffuse Interstellar Bands and the Ultraviolet Extinction Curves: The Missing Link Revisited
Li, Aigen; Xiang, F. Y.; Zhong, J. X.
A large number of interstellar absorption features at ∼4000 Å-1.8 µm, known as the “diffuse interstellar bands” (DIBs), remains unidentified. Most recent works relate them to large polycyclic aromatic hydrocarbon (PAH) molecules or ultrasmall carbonaceous grains which are also thought to be responsible for the 2175 \mathringA extinction bump…
Uniform Contribution of Supernova Explosions to the Chemical Enrichment of Abell 3112 out to R 200
Miller, Eric D.; Bulbul, Esra; Smith, Randall K. +5 more
The spatial distribution of the metals residing in the intra-cluster medium (ICM) of galaxy clusters records all the information on a cluster’s nucleosynthesis and chemical enrichment history. We present measurements from a total of 1.2 Ms Suzaku XIS and 72 ks Chandra observations of the cool-core galaxy cluster Abell 3112 out to its virial radius…
Star Formation Activity in the Molecular Cloud G35.20-0.74: Onset of Cloud-Cloud Collision
Dewangan, L. K.
To probe star formation (SF) processes, we present results of an analysis of the molecular cloud G35.20-0.74 (hereafter MCG35.2) using multi-frequency observations. The MCG35.2 is depicted in a velocity range of 30-40 km s-1. An almost horseshoe-like structure embedded within the MCG35.2 is evident in the infrared and millimeter images …
Spectral Resolution-linked Bias in Transit Spectroscopy of Extrasolar Planets
Deming, Drake; Sheppard, Kyle
We re-visit the principles of transmission spectroscopy for transiting extrasolar planets, focusing on the overlap between the planetary spectrum and the illuminating stellar spectrum. Virtually all current models of exoplanetary transmission spectra utilize an approximation that is inaccurate when the spectrum of the illuminating star has a compl…
Spatially resolved CO SLED of the Luminous Merger Remnant NGC 1614 with ALMA
Aalto, Susanne; Yun, Min S.; Kaneko, Hiroyuki +13 more
We present high-resolution (1.″0) Atacama Large Millimeter/submillimeter Array (ALMA) observations of CO (1-0) and CO (2-1) rotational transitions toward the nearby IR-luminous merger NGC 1614 supplemented with ALMA archival data of CO (3-2) and CO (6-5) transitions. The CO (6-5) emission arises from the starburst ring (central 590 pc in radius), …