Search Publications
The MOSDEF Survey: No Significant Enhancement in Star Formation or Deficit in Metallicity in Merging Galaxy Pairs at 1.5 ≲ z ≲ 3.5
Barro, Guillermo; Siana, Brian; Shapley, Alice E. +15 more
We study the properties of 30 spectroscopically identified pairs of galaxies observed during the peak epoch of star formation in the universe. These systems are drawn from the MOSFIRE Deep Evolution Field (MOSDEF) Survey at 1.4 ≤ z ≤ 3.8, and are interpreted as early-stage galaxy mergers. Galaxy pairs in our sample are identified as two objects wh…
Initial phases of high-mass star formation: a multiwavelength study towards the extended green object G12.42+0.50
Tej, Anandmayee; Liu, Tie; Ishwara Chandra, C. H. +4 more
We present a multiwavelength study of the extended green object, G12.42+0.50, in this paper. The associated ionized, dust, and molecular components of this source are studied in detail employing various observations at near-, mid- and far-infrared, submillimetre, and radio wavelengths. Radio continuum emission mapped at 610 and 1390 MHz, using the…
Observations of Solar Wind from Earth-directed Coronal Pseudostreamers
Panasenco, O.; Wang, Y. -M.
Low-speed (≲450 km s-1) solar wind is widely considered to originate from streamer loops that intermittently release their contents into the heliosphere, in contrast to high-speed wind, which has its source in large coronal holes. To account for the presence of slow wind far from the heliospheric current sheet (HCS), it has been suggest…
The nature of the soft excess and spectral variability in the Seyfert 1 galaxy Zw 229.015
Welsh, W. F.; Gallo, L. C.; Waddell, S. G. H. +2 more
We have carried out a systematic analysis of the nearby (z = 0.0279) active galaxy Zw 229.015 using multi-epoch, multi-instrument, and deep pointed observations with XMM-Newton, Suzaku, Swift,and NuSTAR. Spectral and temporal variability are examined in detail on both the long (weeks-to-years) and short (hours) time-scales. A deep Suzaku observati…
Simulating cosmological substructure in the solar neighbourhood
Grand, Robert J. J.; Gómez, Facundo A.; Marinacci, Federico +8 more
We explore the predictive power of cosmological, hydrodynamical simulations for stellar phase-space substructure and velocity correlations with the AURIGA simulations and AURIGAIA mock Gaia catalogues. We show that at the solar circle the AURIGA simulations commonly host phase-space structures in the stellar component that have constant orbital en…
TT Arietis: 40 yr of photometry
Bruch, Albert
In an effort to characterize variations on the time-scale of hours and smaller during the high and low states of the nova-like variable TT Ari, light curves taken over the course of more than 40 yr are analysed. It is found that the well-known negative superhump observed during the high state persists until the present day at an average period of …
Evidence for a clumpy disc-wind in the star-forming Seyfert 2 galaxy MCG-03-58-007
Campana, S.; Schartel, N.; Santos-Lleó, M. +9 more
We report the results of a detailed analysis of a deep simultaneous 130 ksXMM-Newton and NuSTAR observation of the nearby (z = 0.0315) and bright (L_bol∼ 3× 10^{45} erg s^{-1}) starburst-active galactic nucleus (AGN) Seyfert 2 system: MCG-03-58-007. From the broad-band fitting we show that most of the obscuration needs to be modelled with a toroid…
Near-infrared imaging polarimetry toward M 17 SWex
Kusune, Takayoshi; Nakamura, Fumitaka; Tamura, Motohide +7 more
We conducted near-infrared (JHK_s) imaging polarimetry toward the infrared dark cloud (IRDC) M 17 SWex, including almost all of the IRDC filaments as well as its outskirts, with the polarimeter SIRPOL on the IRSF 1.4 m telescope. We revealed the magnetic fields of M 17 SWex with our polarization-detected sources that were selected by some criteria…
In-flight photometry extraction of PLATO targets. Optimal apertures for detecting extrasolar planets
Cabrera, J.; Samadi, R.; Börner, A. +7 more
Context. The ESA PLATO space mission is devoted to unveiling and characterizing new extrasolar planets and their host stars. This mission will encompass a very large (>2100 deg2) field of view, granting it the potential to survey up to one million stars depending on the final observation strategy. The telemetry budget of the spacecra…
Molecular envelope around the HII region RCW 120
Wiebe, D. S.; Anderson, L. D.; Kirsanova, M. S. +5 more
The H II region RCW 120 is a well-known object, which is often considered as a target to verify theoretical models of gas and dust dynamics in the interstellar medium. However, the exact geometry of RCW 120 is still a matter of debate. In this work, we analyse observational data on molecular emission in RCW 120 and show that 13CO(2-1) a…