881 citations · 29.1k across the 1.2k of their papers we have counts for
30 papers · 2 filters
The Size of the Longest Filaments in the Universe
Somnath Bharadwaj, Suketu Bhavsar, Jatush V. Sheth
We analyze the filamentarity in the Las Campanas redshift survey (LCRS) and determine the length scale at which filaments are statistically significant. The largest length-scale at…
Misleading results from low-resolution spectroscopy: from galaxy interstellar medium chemistry to cosmic star formation density
Y. C. Liang, F. Hammer, H. Flores +2
Low resolution spectroscopy (R=150) from the Canada-France-Redshift Survey (CFRS) had revealed intriguing properties for low redshift galaxies (z<=0.3): nearly half of their spectr…
A quantitative analysis of OCN- formation in interstellar ice analogs
F. A. van Broekhuizen, J. V. Keane, W. A. Schutte
The 4.62 micron absorption band, observed along the line-of-sight towards various young stellar objects, is generally used as a qualitative indicator for energetic processing of in…
NLTE Spectral Analysis of Central Stars of PNe Interacting with the ISM
T. Rauch, F. Kerber, E. Furlan +1
The analysis of Planetary Nebulae (PNe) provides a tool to investigate the properties of their exciting central stars (CSPN) at the moment of the PN ejection as well as on the prop…
Abundance patterns in the low-metallicity emission-line galaxies from the Early Data Release of the Sloan Digital Sky Survey
Y. I. Izotov, G. Stasinska, N. G. Guseva +1
We have derived element abundances in 310 emission-line galaxies from the Early Data Release of the Sloan Digital Sky Survey (SDSS) for which the [O {\sc iii}] 4363 emission line w…
Modelling of the continuum emission from Class 0 sources
M. Rengel, D. Froebrich, S. Wolf +1
Class 0 sources are objects representing the earliest phase of the protostellar evolution. Since they are highly obscured by an extended dusty envelope, these objects emit mainly i…
Dust enshrouded star-forming activity in Arp 299
P. Gallais, V. Charmandaris, E. Le Floc'h +4
We present mid-infrared spectro-imaging (5 - 16 microns) observations of the infrared luminous interacting system Arp 299 (=Mrk171 =IC694+NGC3690) obtained with the ISOCAM instrume…
The Universe behind the Southern Milky Way
R. C. Kraan-Korteweg, L. Staveley-Smith, J. Donley +2
A first analysis of a deep blind HI survey covering the southern Zone of Avoidance plus an extension towards the north (196 < l < 52 deg) obtained with the Multibeam receiver at th…
Central DM density cuspiness in LSB's: a stellar kinematics approach
A. Pizzella, E. M. Corsini, F. Bertola +4
We present preliminary results from spectroscopic observations of a sample of 11 low surface brightness galaxies (LSB). We measured the stellar and gaseous kinematics along their m…
Redshift Measurements of Faint Distant Giant Radio Galaxies and Observational Constraints on their Jet Power and Dynamical Age
K. Chyzy, M. Jamrozy, S. J. Kleinman +6
The redshifts of faint radio galaxies identified with giant radio source candidates selected from the sample of Machalski et al. (2001) have been measured. Given the redshift, the…
Epsilon Indi Ba/Bb: the nearest binary brown dwarf
M. J. McCaughrean, L. M. Close, R. -D. Scholz +5
We have carried out high angular resolution near-infrared imaging and low-resolution (R~1000) spectroscopy of the nearest known brown dwarf, Eps Indi B, using the ESO VLT NAOS/CONI…
The peculiar circumstellar environment of NGC2024-IRS2
A. Lenorzer, A. Bik, A. de Koter +5
We re-examine the nature of NGC2024-IRS2 in light of the recent discovery of the late O-type star, IRS2b, located 5 arcsec from IRS2. Using L-band spectroscopy, we set a lower limi…
Constraining the dark energy dynamics with the cosmic microwave background bispectrum
F. Giovi, C. Baccigalupi, F. Perrotta
We consider the influence of the dark energy dynamics at the onset of cosmic acceleration on the Cosmic Microwave Background (CMB) bispectrum, through the weak lensing effect induc…
Restless Quasar Activity: From BeppoSAX to Chandra and XMM-Newton
C. Vignali, A. Comastri, W. N. Brandt
We briefly review some of the progress made in the last decade in the study of the X-ray properties of the quasar population from the luminous, local objects observed by BeppoSAX t…
XMM-Newton search for hot gas in the dwarf galaxy IC 2574
Michael Kappes, Juergen Kerp, Fabian Walter
We present an XMM-Newton observation of the nearby dwarf galaxy IC 2574. This galaxy is part of our ensemble observed within a multi-frequency campaign to study the physical condit…
Black Hole Winds
A. R. King, K. A. Pounds
We show that black holes accreting at or above the Eddington rate probably produce winds which are optically thick in the continuum, whether in quasars or X-ray binaries. The photo…
Spectroscopic and photometric studies of low-metallicity star-forming dwarf galaxies. III. SBS 1415+437
N. G. Guseva, P. Papaderos, Y. I. Izotov +4
We present a detailed optical spectroscopic and B,V,I,Halpha photometric study of the metal-deficient cometary blue compact dwarf (BCD) galaxy SBS 1415+437. We derive an oxygen abu…
Spectroscopic and photometric studies of low-metallicity star-forming dwarf galaxies. II. HS 1442+4250
N. G. Guseva, P. Papaderos, Y. I. Izotov +4
We present broad-band V and I imaging and long-slit spectroscopy in the optical range 3600-7500A of the dwarf irregular galaxy HS 1442+4250. The oxygen abundance 12+log(O/H)=7.63+/…
Spectroscopic and photometric studies of low-metallicity star-forming dwarf galaxies. I. SBS 1129+576
N. G. Guseva, P. Papaderos, Y. I. Izotov +4
Spectroscopy and V,I CCD photometry of the dwarf irregular galaxy SBS 1129+576 are presented for the first time. The CCD images reveal a chain of compact H II regions within the el…
WR bubbles and HeII emission
Y. Naze, G. Rauw, J. Manfroid +2
We present the very first high quality images of the HeII 4686 emission in three high excitation nebulae of the Magellanic Clouds. A fourth high excitation nebula, situated around…
Numerical 3D constraints on convective eddy time-correlations : consequences for stochastic excitation of solar p modes
R. Samadi, A. Nordlund, R. F. Stein +2
A 3D simulation of the upper part of the solar convective zone is used to obtain information on the frequency component, chi_k, of the correlation product of the turbulent velocity…
Microlensing towards M31 with MDM data
S. Calchi Novati, Ph. Jetzer, G. Scarpetta +4
We report the final analysis of a search for microlensing events in the direction of the Andromeda galaxy, which aimed to probe the MACHO composition of the M31 halo using data col…
The quest for hot gas in the halo of NGC 1511
M. Dahlem, M. Ehle, F. Jansen +3
XMM-Newton observations of the starburst galaxy NGC 1511 reveal the presence of a previously unknown extended hot gaseous phase of its ISM, which partly extends out of the disk pla…
A new technique to improve RFI suppression in radio interferometers
D. Anish Roshi, R. A. Perley
Radio interferometric observations are less susceptible to radio frequency interference (RFI) than single dish observations. This is primarily due to : (1)fringe-frequency averagin…