Search Publications
Missions
Journals
Publication Years
The Structure of the Young Star Cluster NGC 6231. I. Stellar Population
Gromadzki, Mariusz; Feigelson, Eric D.; Getman, Konstantin V. +4 more
NGC 6231 is a young cluster (age ∼2-7 Myr) dominating the Sco OB1 association (distance ∼1.59 kpc) with ∼100 O and B stars and a large pre-main-sequence stellar population. We combine a reanalysis of archival Chandra X-ray data with multiepoch near-infrared (NIR) photometry from the VISTA Variables in the Vía Lactéa (VVV) survey and published opti…
The complex, dusty narrow-line region of NGC 4388: gas-jet interactions, outflows and extinction revealed by near-IR spectroscopy
Colina, L.; Ho, L. C.; Winge, C. +14 more
We present Gemini/GNIRS (Gemini Near-Infrared Spectrograph) spectroscopy of the Seyfert 2 galaxy NGC 4388, with simultaneous coverage from 0.85 to 2.5 µm. Several spatially extended emission lines are detected for the first time, both in the obscured and unobscured portion of the optical narrow-line region (NLR), allowing us to assess the co…
Discovery of a Very Bright and Intrinsically Very Luminous, Strongly Lensed Lyα Emitting Galaxy at z = 2.82 in the BOSS Emission-Line Lens Survey
Brownstein, Joel R.; Marques-Chaves, Rui; Oguri, Masamune +9 more
We report the discovery of a very bright (r = 20.16), highly magnified, and yet intrinsically very luminous Lyα emitter (LAE) at z=2.82. This system comprises four images in the observer plane with a maximum separation of ∼ 6\prime\prime and it is lensed by a z=0.55 massive early-type galaxy. It was initially identified in the Baryon Os…
The protoplanetary system HD 100546 in Hα polarized light from SPHERE/ZIMPOL. A bar-like structure across the disk gap?
Lumsden, S. L.; Mendigutía, I.; Huélamo, N. +7 more
Context. HD 100546 is one of the few known pre-main-sequence stars that may host a planetary system in its disk.
Aims: This work aims to contribute to our understanding of HD 100546 by analyzing new polarimetric images with high spatial resolution.
Methods: Using VLT/SPHERE/ZIMPOL with two filters in Hα and the adjacent continuum, we hav…
The paleolacustrine evolution of Juventae Chasma and Maja Valles and its implications for the formation of interior layered deposits on Mars
Jaumann, Ralf; Bishop, Janice L.; Gross, Christoph +4 more
Juventae Chasma, Mars, is an approximately 7 km deep basin located in close vicinity of Valles Marineris. It extends for ∼190 km east-west and ∼270 km north-south and exhibits several light-toned interior layered deposits (ILDs). These deposits form four large and distinctive light-toned mounds referred to as mound A, B, C, and D, from south to no…
Looking for dark matter trails in colliding galaxy clusters
Massey, Richard; Kneib, Jean-Paul; Harvey, David +1 more
If dark matter interacts, even weakly, via non-gravitational forces, simulations predict that it will be preferentially scattered towards the trailing edge of the halo during collisions between galaxy clusters. This will temporarily create a non-symmetric mass profile, with a trailing overdensity along the direction of motion. To test this hypothe…
A very dark stellar system lost in Virgo: kinematics and metallicity of SECCO 1 with MUSE
Bellazzini, M.; Testa, V.; Beccari, G. +11 more
We present the results of VLT-MUSE (Very Large Telescope-Multi Unit Spectroscopic Explorer) integral field spectroscopy of SECCO 1, a faint, star-forming stellar system recently discovered as the stellar counterpart of an ultracompact high-velocity cloud (HVC 274.68+74.0), very likely residing within a substructure of the Virgo cluster of galaxies…
Consistency of the Planck CMB data and ΛCDM cosmology
Hazra, Dhiraj Kumar; Shafieloo, Arman
We test the consistency between Planck temperature and polarization power spectra and the concordance model of Λ Cold Dark Matter cosmology (ΛCDM) within the framework of Crossing statistics. We find that Planck TT best fit ΛCDM power spectrum is completely consistent with EE power spectrum data while EE best fit ΛCDM power spectrum is not consist…
A comprehensive study of young B stars in NGC 2264 . I. Space photometry and asteroseismology
Fossati, L.; Przybilla, N.; Nieva, M. -F. +9 more
Context. Space photometric time series of the most massive members of the young open cluster NGC 2264 allow us to study their different sources of variability down to the millimagnitude level and permit a search for slowly pulsating B (SPB)-type pulsation among objects that are only a few million years old.
Aims: Our goal is to conduct a homo…
A systematic analysis of the XMM-Newton background: II. Properties of the in-Field-Of-View excess component
Tiengo, Andrea; De Luca, Andrea; Marelli, Martino +6 more
We present an accurate characterization of the particle background behaviour on XMM-Newton based on the entire EPIC archive. This corresponds to the largest EPIC data set ever examined. Our results have been obtained thanks to the collaboration between the FP7 European program EXTraS and the ESA R&D ATHENA activity AREMBES. We used as a diagno…