Search Publications
[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…
3D pyCloudy modelling of bipolar planetary nebulae: Evidence for fast fading of the lobes
Morisset, C.; Zijlstra, A. A.; Gesicki, K.
Aims: The origin and evolution of the shapes of bipolar planetary nebulae are poorly understood. We postulate that their history can be traced through their internal velocity fields in a procedure similar to the one well established for spherical objects. Such an analysis requires 3D photoionization and kinematical modelling that is computati…
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…
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…
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…
Suzaku and XMM-Newton observations of the North Polar Spur: Charge exchange or ISM absorption?
Gu, Liyi; Kaastra, Jelle; Mao, Junjie +1 more
By revisiting the Suzaku and XMM-Newton data of the North Polar Spur, we discovered that the spectra are inconsistent with the traditional model consisting of pure thermal emission and neutral absorption. The most prominent discrepancies are the enhanced O vii and Ne ix forbidden-to-resonance ratios, and a high O viii Lyβ line relative to other Ly…
Flux rope proxies and fan-spine structures in active region NOAA 11897
Zhang, J.; Hou, Y. J.; Li, T.
Context. Flux ropes are composed of twisted magnetic fields and are closely connected with coronal mass ejections. The fan-spine magnetic topology is another type of complex magnetic fields. It has been reported by several authors, and is believed to be associated with null-point-type magnetic reconnection.
Aims: We try to determine the numbe…
Sub-kpc star formation law in the local luminous infrared galaxy IC 4687 as seen by ALMA
Colina, L.; Villar-Martín, M.; Planesas, P. +8 more
We analyze the spatially resolved (250 pc scales) and integrated star formation (SF) law in the local luminous infrared galaxy (LIRG) IC 4687. This is one of the first studies of the SF law on a starburst LIRG at these small spatial scales. We combined new interferometric ALMA CO(2-1) data with existing HST/NICMOS Paα narrowband imaging and VLT/SI…
Activity from the Be/X-ray binary system V0332+53 during its intermediate-luminosity outburst in 2008
Garrido, R.; Özbey Arabacı, M.; Camero-Arranz, A. +7 more
Aims: We present a study of the Be/X-ray binary system V 0332+53 with the main goal of characterizing its behaviour mainly during the intermediate-luminosity X-ray event in 2008. In addition, we aim to contribute to the understanding of the behaviour of the donor companion by including optical data from our dedicated campaign starting in 2006…
Suzaku and XMM-Newton observations of the newly discovered early-stage cluster merger of 1E2216.0-0401 and 1E2215.7-0404
Urdampilleta, I.; Kaastra, J. S.; Mernier, F. +6 more
We present the results of Suzaku and XMM-Newton X-ray observations of the cluster pair