Search Publications
Complete spectral energy distribution of the hot, helium-rich white dwarf RX J0503.9-2854
Hoyer, D.; Rauch, T.; Werner, K. +2 more
Context. In the line-of-sight toward the DO-type white dwarf
The effect of the environment on the structure, morphology and star formation history of intermediate-redshift galaxies
Schrabback, Tim; Aragón-Salamanca, Alfonso; Milvang-Jensen, Bo +4 more
With the aim of understanding the effect of the environment on the star formation history and morphological transformation of galaxies, we present a detailed analysis of the colour, morphology and internal structure of cluster and field galaxies at 0.4 ≤ z ≤ 0.8. We use the Hubble Space Telescope data for over 500 galaxies from the ESO Distant Clu…
Outflow and Metallicity in the Broad-Line Region of Low-Redshift Active Galactic Nuclei
Nagao, Tohru; Woo, Jong-Hak; Shin, Jaejin
Outflows in active galactic nuclei (AGNs) are crucial to understand in investigating the co-evolution of supermassive black holes (SMBHs) and their host galaxies since outflows may play an important role as an AGN feedback mechanism. Based on archival UV spectra obtained with the Hubble Space Telescope and IUE, we investigate outflows in the broad…
Similarities in element content between comet 67P/Churyumov-Gerasimenko coma dust and selected meteorite samples
Engrand, Cécile; Merouane, Sihane; Paquette, John +8 more
We have analysed the element composition and the context of particles collected within the coma of 67P/Churyumov-Gerasimenko with Rosetta's COmetary Secondary Ion Mass Analyzer (COSIMA). A comparison has been made between on board cometary samples and four meteorite samples measured in the laboratory with the COSIMA reference model. Focusing on th…
Shallow water simulations of Saturn's giant storms at different latitudes
Sánchez-Lavega, A.; García-Melendo, E.
Shallow water simulations are used to present a unified study of three major storms on Saturn (nicknamed as Great White Spots, GWS) at different latitudes, polar (1960), equatorial (1990), and mid-latitude (2010) (Sánchez-Lavega, 2004; Sánchez-Lavega et al., 2011). In our model, the three GWS are initiated by introducing a Gaussian function pulse …
Reddening and He I ∗ λ10830 Absorption Lines in Three Narrow-line Seyfert 1 Galaxies
Zhou, Hongyan; Ji, Tuo; Shi, Xiheng +6 more
We report the detection of heavy reddening and the He I* λ10830 absorption lines at the active galactic nucleus (AGN) redshift in three narrow-line Seyfert 1 galaxies: SDSS J091848.61+211717.0, SDSS J111354.66+124439.0, and SDSS J122749.13+321458.9. They exhibit very red optical to near-infrared colors, narrow Balmer/Paschen broad emission lines a…
Orbital variations in intensity and spectral properties of the highly obscured sgHMXB IGR J16318-4848
Paul, Biswajit; Iyer, Nirmal
IGR J16318-4848 is an X-ray binary with the highest known line-of-sight absorption column density among all known X-ray binary systems in our Galaxy. In order to investigate the reason behind such a large absorption column, we looked at the variations in the X-ray intensity and spectral parameters as a function of the tentatively discovered ∼80 d …
Rosetta Alice/VIRTIS observations of the water vapour UV electroglow emissions around comet 67P/Churyumov-Gerasimenko
Stern, S. A.; Feldman, P. D.; Bertaux, J. -L. +18 more
Several UV emission lines of the coma of 67P/Churyumov-Gerasimenko have been observed by Alice/Rosetta before the 67P/CG perihelion. The H and O emissions are mainly produced by impact dissociation of water molecules by suprathermal electrons. In this paper, we explore further the electron dissociative excitation of H2O to produce the U…
Shutting down or powering up a (U)LIRG? Merger components in distinctly different evolutionary states in IRAS 19115-2124 (the Bird)
Kuncarayakti, Hanindyo; Reunanen, Juha; Mattila, Seppo +5 more
We present new SINFONI near-infrared (NIR) integral field unit (IFU) spectroscopy and Southern African Large Telescope (SALT) optical long-slit spectroscopy characterizing the history of a nearby merging luminous infrared galaxy, dubbed the Bird (IRAS19115-2124). The NIR line-ratio maps of the IFU data cubes and stellar population fitting of the S…
Two-dimensional Molecular Gas and Ongoing Star Formation around H II Region Sh2-104
Wang, Jun-Jie; Xu, Jin-Long; Xu, Ye +6 more
We performed a multi-wavelength study toward H II region Sh2-104. New maps of 12CO J = 1 - 0 and 13CO J = 1 - 0 were obtained from the Purple Mountain Observatory 13.7 m radio telescope. Sh2-104 displays a double-ring structure. The outer ring with a radius of 4.4 pc is dominated by 12, 500 µm, 12CO J = 1 - 0…