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A pair of UV nuclei or a compact star-forming region near the active nucleus in Mrk 766?
Singh, K. P.; Dewangan, G. C.; Deka, P. P. +1 more
We report the discovery of a bright, compact ultraviolet source at a projected separation of 1.1 kpc from the known active galactic nucleus (AGN) in Mrk 766 based on AstroSat/UVIT observations. We perform radial profile analysis and derive the UV flux almost free from the nearby contaminating sources. The new source is about 2.5 and 5.6 times fain…
gzK-colour-selected star-forming galaxies in the AKARI NEP-Deep Field
Goto, Tomotsugu; Pearson, Chris; Jeong, Woong-Seob +7 more
We study the clustering property and physical parameters of gzK-colour-selected star-forming galaxies (sgzKs) based on the Canada-France-Hawaii Telescope surveys over 0.55 deg2 in the AKARI North Ecliptic Pole-Deep Field. Two-point correlation functions for two magnitude-limited cases, Ks < 21.1 (N = 234) and Ks…
Impact of Ionospheric Ions on Magnetospheric Dynamics
Grigorenko, Elena E.; Ilie, Raluca; Kistler, Lynn +2 more
Constraints for Use of Ultraviolet Spectropolarimetry to Detect Chiral Amino Acids from Comets
Gómez de Castro, Ana I.; De Isidro-Gómez, Ana I.
Life is pervasive on planet Earth, but whether life is ubiquitous in the Galaxy and sustainable over timescales comparable to stellar evolution is unknown. Evidence suggests that life first appeared on Earth more than 3.77 Gyr ago, during a period of heavy meteoric bombardment. Amino acids, the building blocks of proteins, have been demonstrated t…
Introduction to Icarus special issue "From Mars Express to ExoMars"
Lopez-Valverde, Miguel A.; Titov, Dmitrij V.; Wilson, Colin F.
In February 2018, the international community working on the investigation and exploration of the atmosphere and surface of Mars met at ESAC near Madrid for a few days conference, organized and funded by the project UPWARDS ("Understanding Planet Mars With Advanced Remote- ensing Datasets and Synergistic Studies", www.upwards-mars.eu) of the EU Ho…
Half-a-century of gamma-ray astrophysics at the Max-Planck Institute for Extraterrestrial Physics
Greiner, Jochen; Schönfelder, Volker
Gamma-ray astronomy has been one of the prime scientific research fields of the Max-Planck Institute for Extraterrestrial Physics (MPE) from its beginning. Over the years, the entire gamma-ray energy range accessible from space was explored. The purpose of this review article is to summarise the achievements of the gamma-ray group at MPE during th…
Analysis of signal to noise ratio in coronagraph observations of coronal mass ejections
West, Matthew J.; Nicula, Bogdan; Bothmer, Volker +7 more
We establish a baseline signal-to-noise ratio (SNR) requirement for the European Space Agency (ESA)-funded Solar Coronagraph for OPErations (SCOPE) instrument in its field of view of 2.5-30 solar radii based on existing observations by the Solar and Heliospheric Observatory (SOHO). Using automatic detection of coronal mass ejections (CMEs), we ana…
Study of dynamical status of the globular cluster NGC 1851 using ultraviolet imaging telescope
Yadav, R. K. S.; Sahu, Snehalata; Subramaniam, Annapurni +1 more
We present the study of dynamical status of the globular cluster NGC 1851. A combination of multi-wavelength space and ground-based data sets are used for the present analysis. In order to select the genuine cluster members, we used the astro-photometric data available from HST and GAIA-DR2 catalogs. The BSS radial distribution of the cluster is p…
How We Can Account for Type Ia Supernova Environment in Cosmological Analysis
Pruzhinskaya, M. V.; Pauna, N.; Novinskaya, A. K. +1 more
Among the other types of supernovae, Type Ia Supernovae (SNe Ia) have less luminosity dispersion at maximum light and show higher optical luminosities. These properties allow to use them as cosmological distance indicators that led to the discovery of the accelerating expansion of the Universe. However, even after the luminosity correction for str…
Investigando la zona de los cúmulos inmersos DBS 114-115-117
Baume, G.; Borissova, J.; Ramirez Alegria, S.
A preliminary study of the stellar population has been carried out in the area of the immersed clusters DBS 114, 115 and 117. The information provided by various astronomical databases and data available in the literature has been used. Photometric data in the optical (VPHAS +, GAIA), near infrared (2MASS-VVV) and mid infrared (WISE) has been incl…