Search Publications
Interacting jets from binary protostars
Bacciotti, F.; Murphy, G. C.; Lery, T. +3 more
Aims: We investigate potential models that could explain why multiple proto-stellar systems predominantly show single jets. During their formation, stars most frequently produce energetic outflows and jets. However, binary jets have only been observed in a very small number of systems.
Methods: We model numerically 3D binary jets for various o…
Star formation in the Trifid Nebula. Cores and filaments
Cernicharo, J.; Lefloch, B.; Pardo, J. R.
Aims: We aim to characterize the properties of the prestellar and protostellar condensations to understand the star formation processes at work in a young HII region
Methods: We have obtained maps of the 1.25 mm thermal dust emission and the molecular gas emission over a region of 20' × 10' around the Trifid Nebula (M 20), with the IRAM 30 m a…
A detailed study of the L1641N star formation region
Olofsson, G.; Gâlfalk, M.
Aims: We search for young stellar objects (YSOs) in the L1641N cluster and characterize the star formation activity through determination of the age distribution, mass function, spatial distribution, and the star formation history.
Methods: Multi-wavelength broad band photometry both from space and the ground are used to look for IR excess in …
A peculiar planetary nebula candidate in a globular cluster in the Fornax dwarf spheroidal galaxy
Larsen, S. S.
Context: Until now, only one planetary nebula (PN) has been known in the Fornax dwarf spheroidal galaxy.
Aims: The discovery of a second PN candidate, associated with one of the 5 globular clusters in the Fornax dwarf, is reported.
Methods: Spectra of the globular cluster H5, obtained with the UVES echelle spectrograph on the ESO Very Larg…
High-resolution X-ray spectroscopy of θ Carinae
Nazé, Y.; Rauw, G.
Context: The peculiar hot star θ Car in the open cluster IC 2602 is a blue straggler as well as a single-line binary with a short period (2.2d).
Aims: Its high-energy properties are not well known, though X-rays can provide useful constraints on the energetic processes at work in binaries as well as in peculiar, single objects.
Methods: We…
The X-ray variability and the near-IR to X-ray spectral energy distribution of four low luminosity Seyfert 1 galaxies
Papadakis, I. E.; Brinkmann, W.; Xilouris, E. M. +1 more
Context: We present the results from a study of the X-ray variability and the near-IR to X-ray spectral energy distribution of four low-luminosity, Seyfert 1 galaxies.
Aims: We compared their variability amplitude and broad band spectrum with those of more luminous AGN in order to investigate whether accretion in low-luminosity AGN operates as…
Exploring the nuclear environment of the NLS1 galaxy Arakelian 564 with XMM-Newton RGS
Page, M. J.; Branduardi-Raymont, G.; Smith, R. A. N.
Aims: We present an accurate characterisation of the high-resolution X-ray spectrum of the Narrow Line Seyfert 1 galaxy Arakelian 564 and put it in to context with other objects of its type by making a detailed comparison of their spectra.
Methods: The data are taken from 5 observations with the XMM-Newton Reflection Grating Spectrometer and f…
Large-scale horizontal flows in the solar photosphere. II. Long-term behaviour and magnetic activity response
Švanda, M.; Sobotka, M.; Klvaňa, M. +1 more
We have developed a method to map large-scale horizontal velocity fields in the solar photosphere. The method was developed, tuned, and calibrated using synthetic data. Now, we apply the method to the series of Michelson Doppler Imager (MDI) Dopplergrams covering almost one solar cycle to generate the information about the long-term behaviour of s…
In search of RR Lyrae type stars in eclipsing binary systems. OGLE052218.07-692827.4: an optical blend
Prša, A.; Guinan, E. F.; Devinney, E. J. +1 more
During the OGLE-2 operation, Soszynski et al. (2003) found 3 LMC candidates for an RR Lyr-type component in an eclipsing binary system. Two of those have orbital periods that are too short to be physically plausible and hence have to be optical blends. For the third, OGLE052218.07-692827.4, we developed a model of the binary that could host the ob…
GRB 070707: the first short gamma-ray burst observed by INTEGRAL
McGlynn, S.; McBreen, S.; Foley, S. +4 more
Context: INTEGRAL has observed 47 long-duration GRBs (T90 ≳ 2 s) and 1 short-duration GRB (T90 ≲ 2 s) in five years of observation since October 2002.
Aims: This work presents the properties of the prompt emission of GRB 070707, which is the first short hard GRB observed by INTEGRAL.
Methods: The spectral and temporal…