Results 21 to 30 of about 409,311 (312)

Testing the Universality of the Stellar IMF with Chandra and HST [PDF]

, 2016
The stellar initial mass function (IMF), which is often assumed to be universal across unresolved stellar populations, has recently been suggested to be "bottom-heavy" for massive ellipticals.
Basu-Zych, A., Coulter, D. A., Eufrasio, R. T., Gonzalez, A. H., Hornschemeier, A. E., Kundu, A., Lehmer, B. D., Maccarone, T., Maraston, C., Peacock, M., Zepf, S. E.   +10 more
core   +2 more sources

An advanced spatial coregistration of cloud properties for the atmospheric Sentinel missions: application to TROPOMI [PDF]

Atmospheric Measurement Techniques
The retrieval of cloud parameters from the atmospheric Sentinel missions requires Earth reflectance measurements from a set of spectral bands. The ground pixels of the involved spectral bands should be fully aligned, but when they are not, special ...
A. Argyrouli, A. Argyrouli, D. Loyola, F. Romahn, R. Lutz, V. Molina García, P. Hedelt, K.-P. Heue, R. Siddans   +8 more
doaj   +1 more source

The initial mass function of early-type galaxies [PDF]

, 2009
We determine an absolute calibration of the initial mass function (IMF) of early-type galaxies, by studying a sample of 56 gravitational lenses identified by the SLACS Survey.
Adam S. Bolton, Auger, Bell, Bernardi, Bernardi, Bolton, Bolton, Bolton, Brinchmann, Bundy, de Vaucouleurs, Elmegreen, Gavazzi, Gavazzi, Gerhard, Gnedin, Graves, Humphrey, Jaffe, Jiang, Jimenez, Koopmans, Koopmans, Koopmans, Léon V. E. Koopmans, Matthew W. Auger, Navarro, Newman, Pellegrini, Philip J. Marshall, Raphaël Gavazzi, Sand, Schulz, Thomas, Tommaso Treu, Treu, Treu, Treu, Treu, van Dokkum   +39 more
core   +4 more sources

Probing the Concept of Statistical Independence of Intermediate-Mass Fragment Production in Heavy-Ion Collisions

, 1998
It is found that the total IMF-transverse-energy (E_t) spectra in multi-IMF events are well represented by synthetic spectra obtained by folding of the single-IMF spectrum.
A. Wieloch, A. Wieloch, J. Tõke, J. Tõke, J. Tõke, J. Tõke, L. G. Moretto, W. Skulski, W. U. Schröder   +8 more
core   +2 more sources

The low-mass Initial Mass Function in the young cluster NGC 6611 [PDF]

, 2008
NGC 6611 is the massive young cluster (2-3 Myr) that ionises the Eagle Nebula. We present very deep photometric observations of the central region of NGC 6611 obtained with the Hubble Space Telescope and the following filters: ACS/WFC F775W and F850LP ...
Jeffries, R. D., Oliveira, J. M., van Loon, J. Th.   +2 more
core   +2 more sources

Mass Functions in Fractal Clouds: The Role of Cloud Structure in the Stellar Initial Mass Function [PDF]

, 2010
The possibility that the stellar initial mass function (IMF) arises mostly from cloud structure is investigated with fractal Brownian motion (fBm) clouds that have power-law power spectra. An fBm cloud with a realistic projected power spectrum slope of $\
Bastian, Bate, Bate, Bensch, Beresnyak, Bonnell, Bonnell, Bonnell, Bonnell, Boulanger, Bruce G. Elmegreen, Clark, Clark, Clark, Clark, Crovisier, Deshpande, Di Fazio, Dib, Dib, Dickey, Draine, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Fleck, Flower, Gautier, Green, Hennebelle, Henriksen, Hoversten, Hujeirat, Hunter, Ingalls, Johnstone, Kamaya, Klessen, Kroupa, Krumholz, Lada, Larson, Larson, Larson, Larson, Lazarian, Lee, Lee, Li, Martel, Meurer, Miville-Deschênes, Miville-Deschênes, Miville-Deschênes, Mohsen Shadmehri, Motte, Nakamura, Nakamura, Omont, Padmanabhan, Padoan, Padoan, Padoan, Padoan, Padoan, Palouš, Press, Rathborne, Reipurth, Roy, Smith, Stützki, Stützki, Sun, Tilley, Vázquez-Semadeni, Williams, Zinnecker   +84 more
core   +1 more source

Tropospheric NO₂ retrieval algorithm for geostationary satellite instruments: applications to GEMS [PDF]

Atmospheric Measurement Techniques
In this study, we develop an advanced retrieval algorithm for tropospheric nitrogen dioxide (NO2) from the geostationary satellite instruments and apply it to Geostationary Environment Monitoring Spectrometer (GEMS) observations.
S. Seo, P. Valks, P. Valks, R. Lutz, K.-P. Heue, P. Hedelt, V. Molina García, D. Loyola, H. Lee, J. Kim   +9 more
doaj   +1 more source

Restoration of Simulated EnMAP Data through Sparse Spectral Unmixing

Remote Sensing, 2015
This paper proposes the use of spectral unmixing and sparse reconstruction methods to restore a simulated dataset for the Environmental Mapping and Analysis Program (EnMAP), the forthcoming German spaceborne hyperspectral mission.
Daniele Cerra, Jakub Bieniarz, Rupert Müller, Tobias Storch, Peter Reinartz   +4 more
doaj   +1 more source

AUTOMATIC BUILDING EXTRACTION AND ROOF RECONSTRUCTION IN 3K IMAGERY BASED ON LINE SEGMENTS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
We propose an image processing workflow to extract rectangular building footprints using georeferenced stereo-imagery and a derivative digital surface model (DSM) product.
A. Köhn, J. Tian, F. Kurz
doaj   +1 more source

Shifting paradigms of thought and power [PDF]

Bezbednosni Dijalozi, 2020
The article argues that a shift in paradigm is required away from the free market. The key question is if we are brave enough to call ourselves collectively and individually to moral and social accountability.
Alejandro BENDAŇA
doaj   +1 more source