Search Publications
The kinematics and chemical stratification of the type Ia supernova remnant 0519-69.0. An XMM-Newton and Chandra study
Vink, J.; Kosenko, D.; Helder, E. A.
We present a detailed analysis of the XMM-Newton and Chandra X-ray data of the young type Ia supernova remnant SNR 0519-69.0, which is situated in the Large Magellanic Cloud. We used data from both the Chandra ACIS and XMM-Newton EPIC MOS instruments, and high resolution X-ray spectra obtained with the XMM-Newton reflection grating spectrometer (R…
Herschel photometry of brightest cluster galaxies in cooling flow clusters
Böhringer, H.; Popesso, P.; Jaffe, W. +24 more
The dust destruction timescales in the cores of clusters of galaxies are relatively short given their high central gas densities. However, substantial mid-infrared and sub-mm emission has been detected in many brightest cluster galaxies. In this letter we present Herschel PACS and SPIRE photometry of the brightest cluster galaxy in three strong co…
The dust morphology of the elliptical Galaxy M 86 with SPIRE
Elbaz, D.; Bock, J. J.; Clements, D. L. +58 more
We present Herschel-SPIRE observations at 250-500 µm of the giant elliptical galaxy M 86 and examine the distribution of the resolved cold dust emission and its relation with other galactic tracers. The SPIRE images reveal three dust components: emission from the central region; a dust lane extending north-south; and a bright emission featur…
High-resolution HST/ACS images of detached shells around carbon stars
Eriksson, K.; Gustafsson, B.; Olofsson, H. +2 more
Context. Overall spherically symmetric, geometrically thin gas and dust shells have been found around a handful of asymptotic giant branch (AGB) carbon stars. Their dynamical ages lie in the range of 103 to 104 years. A tentative explanation for their existence is that they have formed as a consequence of mass-loss-rate modul…
Periodic mass-loss episodes due to an oscillation mode with variable amplitude in the hot supergiant HD 50064
Auvergne, M.; Dupret, M. -A.; Baudin, F. +15 more
Aims: We aim to interpret the photometric and spectroscopic variability of the luminous blue variable supergiant HD 50064 (V = 8.21).
Methods: CoRoT space photometry and follow-up high-resolution spectroscopy with a time base of 137 d and 169 d, respectively, was gathered, analysed, and interpreted using standard time series analysis and…
CoRoT light curves of RR Lyrae stars. CoRoT 101128793: long-term changes in the Blazhko effect and excitation of additional modes
Auvergne, M.; Deleuil, M.; Poretti, E. +13 more
Context. The CoRoT (Convection, Rotation and planetary Transits) space mission provides a valuable opportunity to monitor stars with uninterrupted time sampling for up to 150 days at a time. The study of RR Lyrae stars, performed in the framework of the Additional Programmes belonging to the exoplanetary field, will particularly benefit from such …
Polycyclic aromatic hydrocarbon (PAH) luminous galaxies at z ~ 1
Im, M.; Lee, H. M.; White, G. J. +14 more
Aims: The NEP-deep survey, an extragalactic AKARI survey towards the north ecliptic pole (NEP), provides a comprehensive wavelength coverage from 2 to 24 µm using all 9 photometric bands of the infrared camera (IRC). It allows us to photometrically identify galaxies whose mid-IR emission is clearly dominated by PAHs.
Methods: We pr…
Strong CH+ J = 1-0 emission and absorption in DR21
Boulanger, F.; Falgarone, E.; Godard, B. +30 more
We report the first detection of the ground-state rotational transition of the methylidyne cation CH+ towards the massive star-forming region DR 21 with the HIFI instrument onboard the Herschel satellite. The line profile exhibits a broad emission line, in addition to two deep and broad absorption features associated with the DR 21 mole…
Herschel-PACS spectroscopy of IR-bright galaxies at high redshift
Lutz, D.; Genzel, R.; Poglitsch, A. +11 more
We present Herschel-PACS observations of rest-frame mid-infrared and far-infrared spectral line emissions from two lensed, ultra-luminous infrared galaxies at high redshift: MIPS J142824.0+352619 (MIPS J1428), a starburst-dominated system at z = 1.3, and IRAS F10214+4724 (F10214), a source at z = 2.3 hosting both star-formation and a luminous AGN.…
Intermittent outflows at the edge of an active region - a possible source of the solar wind?
Tu, C. -Y.; Marsch, E.; Tian, H. +2 more
Context. It has already been established that the solar wind may originate at the edges of active regions (ARs), but the key questions of how frequently these outflows occur, and at which height the nascent solar wind originates have not yet been addressed.
Aims: We study the occurrence rate of these intermittent outflows, the related plasma …