Search Publications
The outburst of the eruptive young star OO Serpentis between 1995 and 2006
Prusti, T.; Siebenmorgen, R.; Hony, S. +4 more
Aims:OO Serpentis is a deeply embedded pre-main sequence star in the Serpens NW star-forming region. The star went into outburst in 1995 and gradually faded afterwards. In many respects its eruption resembled the well-known FU Orionis-type (FUor) or EX Lupi-type (EXor) outbursts. Since very few such events have ever been documented at infrared wav…
The molecular and dusty composition of Betelgeuse's inner circumstellar environment
Nguyen, Q. N.; Lopez, B.; Leinert, Ch. +6 more
Context: The study of the atmosphere of red supergiant stars in general and of
Aims: A molecular shell, the MOLsphere (Tsuji 2000a, ApJ, 538, 80…
The infrared compactness-temperature relation for quiescent and starburst galaxies
Elbaz, D.; Chanial, P.; Vigroux, L. +3 more
Context: IRAS observations show the existence of a correlation between the infrared luminosity L_IR and dust temperature Td in star-forming galaxies, in which larger L_IR leads to higher dust temperature. The L_IR -Td relation is commonly seen as reflecting the increase in dust temperature in galaxies with higher star formati…
The cooling of atomic and molecular gas in DR21
Schneider, N.; Ossenkopf, V.; Bontemps, S. +5 more
Aims: We present an overview of a high-mass star formation region through the major (sub-)mm, and far-infrared cooling lines to gain insight into the physical conditions and the energy budget of the molecular cloud.
Methods: We used the KOSMA 3 m telescope to map the core (10'× 14') of the Galactic star-forming region DR21/DR21 (OH) in the Cyg…
PAHs in the halo of NGC 5529
Madden, S.; Parkin, T.; Irwin, J. A. +1 more
We present sensitive ISO λ 6.7~µm observations of the edge-on galaxy, NGC 5529, finding an extensive MIR halo around NGC 5529. The emission is dominated by PAHs in this band. The PAH halo has an exponential scale height of 3.7 kpc but can still be detected as far as ≈10 kpc from the plane to the limits of the high dynamic range (1770/1) data…
ISO far-infrared observations of the high-latitude cloud L1642 . II. Correlated variations of far-infrared emissivity and temperature of "classical large" dust particles
Juvela, M.; Lemke, D.; Russeil, D. +2 more
Aims:Our aim is to compare the infrared properties of big, "classical" dust grains with visual extinction in the cloud
Methods: The far-infrared properties of dust are based on large-scale 100 µm and 200 &…
The 12 µm ISO-ESO-Sculptor and 24 µm Spitzer faint counts reveal a population of ULIRGs as dusty massive ellipticals. Evolution by types and cosmic star formation
Seymour, N.; Rocca-Volmerange, B.; de Lapparent, V. +1 more
Context: Multi-wavelength galaxy number counts provide clues to the nature of galaxy evolution. The interpretation per galaxy type of the mid-IR faint counts obtained with ISO and Spitzer, consistent with the analysis of deep UV-optical-near IR galaxy counts, provide new constraints on the dust and stellar emission. Discovering the nature of new p…
Gas and dust spectra of the D' type symbiotic star HD 330036
Ciroi, S.; Rafanelli, P.; Angeloni, R. +1 more
Aims:We present a comprehensive and self-consistent modelling of the D' type symbiotic star (SS) HD 330036 from radio to UV.
Methods: Within a colliding-wind scenario, we analyse the continuum, line, and dust spectra by means of SUMA, a code that simulates the physical conditions of an emitting gaseous cloud under the coupled effect of ionisat…
Infrared study of the southern Galactic star-forming region associated with IRAS 14416-5937
Ojha, D. K.; Vig, S.; Ghosh, S. K. +1 more
Aims:Our goal was to carry out an infrared study of the southern Galactic massive star-forming region associated with IRAS 14416-5937.
Methods: This star-forming region has been mapped simultaneously in two far infrared bands at ~150 and 210 µm, using the TIFR 1-m balloon borne telescope with ~1' angular resolution. We have used 2MASS JH…
A massive protostellar core with an infalling envelope
Henning, Th.; Krause, O.; Birkmann, S. M. +3 more
Context: Due to the short timescales involved and observational difficulties, our knowledge of the earliest phases of massive star formation remains incomplete.
Aims: We aim to explore the physical conditions during the initial phases of high-mass star formation and to detect a genuine massive (mass M > 8 M_⊙) protostar at an early evolutio…