Search Publications
CARMA observations of Galactic cold cores: searching for spinning dust emission
Paladini, R.; Ysard, N.; Laureijs, R. J. +9 more
We present the first search for spinning dust emission from a sample of 34 Galactic cold cores, performed using the CARMA interferometer. For each of our cores, we use photometric data from the Herschel Space Observatory to constrain bar{N}H, bar{T}d, bar{n}H, and bar{G}0. By computing the mass of the co…
The orthogonally aligned dark halo of an edge-on lensing galaxy in the Hubble Frontier Fields: a challenge for modified gravity
Broadhurst, Tom; Lam, Daniel; Lim, Jeremy +2 more
We examine a well-resolved lensed image that is bent by an edge-on lenticular galaxy, in the Hubble Frontier Fields (HFF) data of MACSJ0416.1-20403. The fortuitous combination of a long arc (zs ≈ 1 ± 0.2) intersecting an edge-on galaxy from the cluster (z = 0.4) provides an opportunity to constrain its dark matter (DM) halo and its orie…
Transit time of CME/shock associated with four major geo-effective CMEs in solar cycle 24
Shanmugaraju, A.; Syed Ibrahim, M.; Bendict Lawrance, M.
The kinematics of coronal mass ejection (CME) in the interplanetary medium is very important in the concept of space-weather. Main aim of this paper is to study the propagation of four major geo-effective CMEs and their associated shocks observed in solar cycle 24. The arrival of interplanetary shocks and CMEs of these events near the Earth is see…
Detection of Flux Emergence, Splitting, Merging, and Cancellation of Network Fields. II. Apparent Unipolar Flux Change and Cancellation
Hagenaar, H. J.; Iida, Y.; Yokoyama, T.
In this second paper in the series, we investigate occurrence frequencies of apparent unipolar processes, cancellation, and emergence of patch structures in quiet regions. Apparent unipolar events are considerably more frequent than cancellation and emergence, per our definition, which is consistent with Lamb et al. Furthermore, we investigate the…
Three-dimensional magnetohydrodynamic model of the interaction between the solar wind and cometary atmospheres
Baranov, V. B.; Alexashov, D. B.; Lebedev, M. G.
A magnetohydrodynamic (MHD) model of the interaction between the solar wind and an expanding gas flow issuing from a comet nucleus is presented. The processes of photoionization of the neutral component of the comet matter and the resonance charge exchange between charged and neutral particles are taken into account, together with the interplaneta…
A Starburst in the Core of a Galaxy Cluster: the Dwarf Irregular NGC 1427A in Fornax
Puzia, Thomas H.; Chanamé, Julio; Mora, Marcelo D.
Gas-rich galaxies in dense environments such as galaxy clusters and massive groups are affected by a number of possible types of interactions with the cluster environment, which make their evolution radically different than that of field galaxies. The dwarf irregular galaxy NGC 1427A, presently infalling toward the core of the Fornax galaxy cluste…
Variations in the 3.3 µm feature and carbonaceous dust in AKARI data
Hammonds, M.; Mori, T.; Usui, F. +1 more
A wealth of near infrared spectroscopic data for a large number of galactic objects was recorded with AKARI during its active lifetime. The hydrocarbon emission features around 3.3 - 3.5 m are modelled here as a series of 6 Voigt profiles arising due to hydrogen atoms found in different molecular structures within the emitting spectroscopic carrie…
Recent Stellar Mass Assembly of Low-mass Star-forming Galaxies at Redshifts 0.3 < z < 0.9
Barro, Guillermo; Tresse, Laurence; Charlot, Stéphane +5 more
The epoch when low-mass star-forming galaxies (LMSFGs) form the bulk of their stellar mass is uncertain. While some models predict an early formation, others favor a delayed scenario until later ages of the universe. We present constraints on the star formation histories (SFHs) of a sample of LMSFGs obtained through the analysis of their spectral …
Propagating disturbances along fan-like coronal loops in an active region
Teriaca, Luca; Krishna Prasad, S.; Banerjee, Dipankar +2 more
Propagating disturbances are often observed in active region fan-like coronal loops. They were thought to be due to slow mode magnetohydrodynamic waves based on some of the observed properties. However, recent studies involving spectroscopy indicate that they could be due to high speed quasi-periodic upflows which are difficult to distinguish from…
The Kinematic and Chemical Properties of a Potential Core-forming Clump: Perseus B1-E
André, Ph.; Henning, Th.; Di Francesco, J. +4 more
We present 13CO and {{C}18}O (1-0), (2-1), and (3-2) maps toward the core-forming Perseus B1-E clump using observations from the James Clerk Maxwell Telescope, the Submillimeter Telescope of the Arizona Radio Observatory, and the IRAM 30 m telescope. We find that the 13CO and {{C}18}O line emission both …