Search Publications
Radiative and mechanical feedback into the molecular gas in the Large Magellanic Cloud. I. N159W
Lebouteiller, V.; Madden, S. C.; Galliano, F. +25 more
We present Herschel SPIRE Fourier Transform Spectrometer (FTS) observations of N159W, an active star-forming region in the Large Magellanic Cloud (LMC). In our observations, a number of far-infrared cooling lines, including carbon monoxide (CO) J = 4 → 3 to J = 12 → 11, [CI] 609 µm and 370 µm, and [NII] 205 µm, are clearly detect…
Measure the distance and extinction for stars in LAMOST survey with Bayesian method
Shi, Jianrong; Zhang, Yong; Wu, Yue +7 more
Using a Bayesian technique, which combines both photometric and spectral information, as well as prior knowledge on the Milky Way, we measured the distance and extinction for about one million stars in the first data release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey. Simulations have been performed based on t…
On the Nature of the Enigmatic Object IRAS 19312+1950: A Rare Phase of Massive Star Formation?
Justtanont, K.; Tielens, A. G. G. M.; Boogert, A. C. A. +7 more
IRAS 19312+1950 is a peculiar object that has eluded firm characterization since its discovery, with combined maser properties similar to an evolved star and a young stellar object (YSO). To help determine its true nature, we obtained infrared spectra of IRAS 19312+1950 in the range 5-550 µm using the Herschel and Spitzer space observatories…
Cassini observations of Saturn's southern polar cusp
Coates, A. J.; Krupp, N.; Russell, C. T. +15 more
The magnetospheric cusps are important sites of the coupling of a magnetosphere with the solar wind. The combination of both ground- and space-based observations at Earth has enabled considerable progress to be made in understanding the terrestrial cusp and its role in the coupling of the magnetosphere to the solar wind via the polar magnetosphere…
Unbeamed tidal disruption events at hard X-rays
Walter, R.; Hryniewicz, K.
Context. Owing to their thermal emission, tidal disruption events (TDEs) were regularly detected in the soft X-rays and sometimes in the optical. Only a few TDEs have been detected at hard X-rays: two are high redshift beamed events, one of which occurred at the core of a nearby galaxy, and the most recent one is of a different nature, involving a…
The Compact Star-forming Complex at the Heart of NGC 253
Davidge, T. J.
We discuss integral field spectra of the compact star-forming complex that is the brightest near-infrared (NIR) source in the central regions of the starburst galaxy NGC 253. The spectra cover the H and K passbands and were recorded with the Gemini NIR Spectrograph during subarcsecond seeing conditions. Absorption features in the spectrum of the s…
Disentangling planetary and stellar activity features in the CoRoT-2 light curve
Deleuil, M.; Meunier, N.; Lanza, A. F. +7 more
Aims: Stellar activity is an important source of systematic errors and uncertainties in the characterization of exoplanets. Most of the techniques used to correct for this activity focus on an ad hoc data reduction.
Methods: We have developed a software for the combined fit of transits and stellar activity features in high-precision long…
A NuSTAR Observation of the Gamma-ray-emitting X-ray Binary and Transitional Millisecond Pulsar Candidate 1RXS J154439.4-112820
Bogdanov, Slavko
I present a 40 ks Nuclear Spectroscopic Telescope Array observation of the recently identified low-luminosity X-ray binary and transitional millisecond pulsar (tMSP) candidate 1RXS J154439.4-112820, which is associated with the high-energy γ-ray source 3FGL J1544.6-1125. The system is detected up to ∼30 keV with an extension of the same power-law …
The daily processing of asteroid observations by Gaia
Muinonen, Karri; Fedorets, Grigori; Pentikäinen, Hanna +15 more
The Gaia mission started its regular observing program in the summer of 2014, and since then it is regularly obtaining observations of asteroids. This paper draws the outline of the data processing for Solar System objects, and in particular on the daily ;short-term; processing, from the on-board data acquisition to the ground-based processing. We…
Pixel Color Magnitude Diagrams for Semi-resolved Stellar Populations: The Star Formation History of Regions within the Disk and Bulge of M31
van Dokkum, Pieter G.; Conroy, Charlie
The analysis of stellar populations has, by and large, been developed for two limiting cases: spatially resolved stellar populations in the color-magnitude diagram, and integrated light observations of distant systems. In between these two extremes lies the semi-resolved regime, which encompasses a rich and relatively unexplored realm of observati…