Search Publications
Low-amplitude rotational modulation rather than pulsations in the CoRoT B-type supergiant HD 46769
Auvergne, M.; Baudin, F.; Poretti, E. +16 more
Aims: We aim to detect and interpret photometric and spectroscopic variability of the bright CoRoT B-type supergiant target HD 46769 (V = 5.79). We also attempt to detect a magnetic field in the target.
Methods: We analyse a 23-day oversampled CoRoT light curve after detrending and spectroscopic follow-up data using standard Fourier anal…
Catching the fish - Constraining stellar parameters for TX Piscium using spectro-interferometric observations
Verhoelst, T.; Marigo, P.; Hron, J. +4 more
Context. Stellar parameter determination is a challenging task when dealing with galactic giant stars. The combination of different investigation techniques has proven to be a promising approach.
Aims: We analyse archive spectra obtained with the Short Wavelength Spectrometer (SWS) onboard ISO, and new interferometric observations from the Ve…
Supersoft X-rays reveal a classical nova in the M 31 globular cluster Bol 126
Della Valle, M.; Pietsch, W.; Haberl, F. +17 more
Context. Classical novae (CNe) represent the main class of supersoft X-ray sources (SSSs) in the central region of our neighbouring galaxy M 31. Only three confirmed novae and three SSSs have been discovered in globular clusters (GCs) of any galaxy so far, of which one nova and two SSSs (including the nova) were found in M 31 GCs.
Aims: To st…
Planck intermediate results. VI. The dynamical structure of PLCKG214.6+37.0, a Planck discovered triple system of galaxy clusters
Böhringer, H.; Kneissl, R.; Dahle, H. +206 more
The survey of galaxy clusters performed by Planck through the Sunyaev-Zeldovich effect has already discovered many interesting objects, thanks to its full sky coverage. One of the SZ candidates detected inthe early months of the mission near to the signal-to-noise threshold, PLCKG214.6+37.0, was later revealed by XMM-Newton to be a triple system o…
HD 85567: A Herbig B[e] star or an interacting B[e] binary?. Resolving HD 85567's circumstellar environment with the VLTI and AMBER
Weigelt, G.; Caratti o Garatti, A.; Wheelwright, H. E. +1 more
Context.
Aims: To elucidate the…
Comparison of solar horizontal velocity fields from SDO/HMI and Hinode data
Roudier, Th.; Malherbe, J. M.; Gizon, L. +7 more
Context. The measurement of the Sun's surface motions with a high spatial and temporal resolution is still a challenge.
Aims: We wish to validate horizontal velocity measurements all over the visible disk of the Sun from Solar Dynamics Observatory/ Helioseismic and Magnetic Imager (SDO/HMI) data.
Methods: Horizontal velocity fields are m…
Ultraviolet diagnostic of porosity-free mass-loss estimates in B stars
Prinja, R. K.; Massa, D. L.
Aims: We seek to establish evidence in UV P Cygni line profiles that the signs of wind clumping and porosity vary with velocity. We aim to demonstrate empirically that while at most wind velocities optically thick clumps cover only a fraction of the stellar surface, close to the terminal velocity (v∞) where narrow absorption compon…
Distribution of HNCO 505-404 in massive star-forming regions
Wang, J. Z.; Li, J.; Gu, Q. S. +1 more
Aims: The goal of this paper is to study the spatial distribution of HNCO in massive star-forming region and to investigate both its spatial association with infrared sources and physical conditions in region of HNCO emission.
Methods: We mapped nine massive star-forming regions in HNCO 505-404 with the Purple Mount…
The star formation history of the Sculptor dwarf irregular galaxy
Cole, A. A.; Lianou, S.
Aims: We study the resolved stellar populations and derive the star formation history of the Sculptor dwarf irregular galaxy (SDIG), a gas-rich dwarf galaxy member of the NGC 7793 subgroup in the Sculptor group of galaxies.
Methods: We constructed a colour - magnitude diagram (CMD) using archival observations from the Hubble Space Telesc…
Inferring the magnetic field vector in the quiet Sun. III. Disk variation of the Stokes profiles and isotropism of the magnetic field
Borrero, J. M.; Kobel, P.
Recent investigations of the magnetic field vector properties in the solar internetwork have provided diverging results. While some works found that the internetwork is mostly pervaded by horizontal magnetic fields, other works argued in favor of an isotropic distribution of the magnetic field vector. Motivated by these seemingly contradictory res…