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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 …
Exploring the Bridge between A3556 and A3558 in the Shapley Supercluster
Kelley, R. L.; Gupta, A.; Mitsuishi, I. +4 more
Looking at the region connecting two clusters is a promising way to identify and study the Warm-Hot Intergalactic Medium. Observations show that the spectrum of the bridge between A3556 and A3558 has a stronger soft X-ray emission than the nearby region. Suzaku observations could not discriminate the origin of the extra emission. In this work we a…
Correcting peak deformation in Rosetta's ROSINA/DFMS mass spectrometer
Gunell, H.; Altwegg, K.; Balsiger, H. +17 more
A comprehensive HST BVI catalogue of star clusters in five Hickson compact groups of galaxies
Bastian, N.; Konstantopoulos, I. S.; Gallagher, S. C. +5 more
We present a photometric catalogue of star cluster candidates in Hickson compact groups (HCGs) 7, 31, 42, 59, and 92, based on observations with the Advanced Camera for Surveys and the Wide Field Camera 3 on the Hubble Space Telescope. The catalogue contains precise cluster positions (right ascension and declination), magnitudes, and colours in th…
Filaments disappearance in relation to coronal mass ejections during the solar cycle 23
Mawad, R.; Shaltout, Mosalam; Yousef, M. +2 more
We have studied the relationship between filament disappearances with CMEs during solar period 1996-2010. We used the observed disappearing filaments in Hα data from Meudon given in NOAA, and coronal mass ejections data (CMEs) from SOHO/LASCO. We obtained 278 CME events (14%) contemporary filament disappearances and CME ejections (from a total of …
Multiwavelength modeling the SED of supersoft X-ray sources III. RS Ophiuchi: The supersoft X-ray phase and beyond
Skopal, A.
I modeled the 14 Å-37 µm SED of the recurrent symbiotic nova RS Oph during its supersoft source (SSS) phase and the following quiescent phase. During the SSS phase, the model SEDs revealed the presence of a strong stellar and nebular component of radiation in the spectrum. The former was emitted by the burning WD at highly super-Eddington ra…
Coupling of the magnetic field and gas flows inferred from the net circular polarization in a sunspot penumbra
Ichimoto, Kiyoshi; Shaltout, Abdelrazek M. K.
We analyze penumbral fine structure using high-resolution spectropolarimetric data obtained by the Solar Optical Telescope on board the Hinode satellite. The spatial correlation between the net circular polarization (NCP) and Evershed flow is investigated in detail. Here we obtain that negative NCP structures are correlated with the Evershed flow …
The Molecular H2 Emission and the Stellar Kinematics in the Nuclear Region of the Sombrero Galaxy
Steiner, J. E.; Menezes, R. B.
We analyze the molecular H2 emission and the stellar kinematics in a data cube of the nuclear region of M104, the Sombrero galaxy, obtained with NIFS on the Gemini-north telescope. After a careful subtraction of the stellar continuum, the only emission line we detected in the data cube was {{{H}}}2λ 21218. An analysis of this…