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Deep GeMS/GSAOI near-infrared observations of N159W in the Large Magellanic Cloud
Zavagno, A.; Neichel, B.; Samal, M. R. +5 more
Aims: The formation and properties of star clusters at the edge of H II regions are poorly known, partly due to limitations in angular resolution and sensitivity, which become particularly critical when dealing with extragalactic clusters. In this paper we study the stellar content and star-formation processes in the young N159W region in the…
Comparative study of water ice exposures on cometary nuclei using multispectral imaging data
Jorda, L.; Lamy, P. L.; Lara, L. M. +48 more
Deep Impact, EPOXI and Rosetta missions visited comets 9P/Tempel 1, 103P/Hartley 2 and 67P/Churyumov-Gerasimenko, respectively. Each of these three missions was equipped with both multispectral imagers and infrared spectrometers. Bright blue features containing water ice were detected in each of these comet nuclei. We analysed multispectral proper…
Diffuse low-ionization gas in the galactic halo casts doubts on z ≃ 0.03 WHIM detections
Piro, L.; Elvis, M.; Nicastro, F. +4 more
In this Letter, we demonstrate that the two claims of z ≃ 0.03 O VII K α absorption lines from Warm Hot Intergalactic Medium (WHIM) along the lines of sight to the blazars H 2356-309 (Buote et al.; Fang et al.) and Mkn 501 (Ren, Fang & Buote) are likely misidentifications of the z = 0 O II K β line produced by a diffuse Low-Ionization Metal Me…
Dark sectors of the Universe: A Euclid survey approach
Tutusaus, Isaac; Lamine, Brahim; Blanchard, Alain +3 more
In this paper we study the consequences of relaxing the hypothesis of the pressureless nature of the dark matter component when determining constraints on dark energy. To this aim we consider simple generalized dark matter models with constant equation of state parameter. We find that present-day low-redshift probes (type-Ia supernovae and baryoni…
Interaction between reconnection and Kelvin-Helmholtz at the high-latitude magnetopause
Zhang, Hui; Ma, Xuanye; Otto, Antonius +1 more
On March 23, 2002, Cluster satellites recorded an event, which has been interpreted as reconnection, during an outward crossing near the dawn side cusp region in the Northern Hemisphere. The event showed a large perturbation in the magnetic normal component, inconsistent with a one-dimensional reconnection layer configuration, and causing a poor r…
Protoplanetary Disks in the Hostile Environment of Carina
Tsamis, Y. G.; Henney, W. J.; Mesa-Delgado, A. +2 more
We report the first direct imaging of protoplanetary disks in the star-forming region of Carina, the most distant massive cluster in which disks have been imaged. Using the Atacama Large Millimeter/sub-millimeter Array (ALMA), the disks are observed around two young stellar objects (YSOs) that are embedded inside evaporating gaseous globules and e…
Radio Pulsation Search and Imaging Study of SGR J1935+2154
Manoharan, P. K.; Surnis, Mayuresh. P.; Joshi, Bhal Chandra +3 more
We present the results obtained from imaging observations and a search for radio pulsations toward the magnetar SGR J1935+2154 made using the Giant Metrewave Radio Telescope and the Ooty Radio Telescope. We present the high-resolution radio image of the supernova remnant (SNR) G57.2+0.8, which is positionally associated with SGR J1935+2154. We did…
[C II] and [N II] from dense ionized regions in the Galaxy
Goldsmith, P. F.; Langer, W. D.; Pineda, J. L.
Context. The interstellar medium (ISM) consists of highly ionized and neutral atomic, as well as molecular, components. Knowledge of their distribution is important for tracing the structure and lifecycle of the ISM.
Aims: To determine the properties of the highly ionized gas and neutral weakly ionized gas in the Galaxy traced by the fine-str…
An Intense Flare-CME Event in 2015: Propagation and Interaction Effects Between the Sun and Earth's Orbit
Manoharan, P. K.; Johri, Abhishek
We report the interplanetary effects of a fast coronal mass ejection (CME) associated with the intense X2.7 flare that occurred on 05 May 2015. The near-Sun signatures of the CME at low-coronal heights [<2 R⊙] are obtained from the EUV images at 171 Å and metric radio observations. The intensity and duration of the CME-driven radio b…
Influence of intermittency on the anisotropy of magnetic structure functions of solar wind turbulence
He, Jiansen; Wang, Xin; Wang, Linghua +4 more
Intermittency appears to be connected with the spectral anisotropy of solar wind turbulence. We use the Local Intermittency Measure to identify and remove intermittency from the magnetic field data measured by the Ulysses spacecraft in fast solar wind. Structure functions are calculated based on the time sequences as obtained before and after remo…