Results 11 to 20 of about 61,866 (206)

Echoes of multiple outbursts of Sagittarius A* revealed by Chandra [PDF]

, 2013
The relatively rapid spatial and temporal variability of the X-ray radiation from some molecular clouds near the Galactic center shows that this emission component is due to the reflection of X-rays generated by a source that was luminous in the past ...
Clavel, Maïca, Goldwurm, A., Morris, M. R., Ponti, G., Soldi, S., Terrier, R., Trap, G.   +6 more
core   +5 more sources

A long look at the BALQSO LBQS 2212-1759 with XMM-Newton

, 2005
Very long (172 ks effective exposure time) observations of the BALQSO LBQS 2212-1759 with XMM-Newton yield a stringent upper-limit on its 0.2-10 keV (rest- frame 0.64-32.2 keV) flux, F < 6 E-17 erg/cm2/s, while simultaneous UV and optical observations ...
Arav, Barkhouse, Becker, Boroson, Briggs, Cardelli, den Herder, Elvis, Francis, Gallagher, Gallagher, Gallagher, Gorenstein, Green, Green, Grupe, Haardt, Hewett, J. Clavel, Jansen, Kleinmann, Korista, Kuhn, L. Tomas, Laor, Leighly, Mason, Mathur, Menou, Morris, Murray, N. Schartel, Ogle, Proga, Sabra, Schlegel, Schmidt, Strateva, Strüder, Turner, Vanden Berk, Vignali, Wang, Weyman, Zamorani, Zheng   +45 more
core   +1 more source

Inner Size of a Dust Torus in the Seyfert 1 Galaxy NGC 4151

, 2003
The most intense monitoring observations yet made were carried out on the Seyfert 1 galaxy NGC 4151 in the optical and near-infrared wave-bands. A lag from the optical light curve to the near-infrared light curve was measured.
Antonucci R., Baribaud T., Bruce A. Peterson, Clavel J., Glass I. S., Hiroyuki Tomita, Keigo Enya, Kotilainen J. K., Masahiro Suganuma, Oknyanskij V. L., Oknyanskij V. L., Oknyanskij V. L., Takeo Minezaki, Tsutomu Aoki, Ulrich M.-H., Winkler H., Winkler H., Yoshii Y., Yukiyasu Kobayashi, Yuzuru Yoshii   +19 more
core   +1 more source

Multimodal Imaging Investigation of the Dentato‐Thalamo‐Cortical Pathway in Friedreich's Ataxia

Movement Disorders, EarlyView.
Abstract Background Friedreich's ataxia (FRDA) is a spinocerebellar neurodegenerative disorder. The dentato‐thalamo‐cortical (DTC) pathway, an important cerebellar output involved in motor control, plays a crucial role in the neural mechanisms underlying ataxia symptoms in FRDA.
Yinghua Jing, Imis Dogan, Ravi Dadsena, Jennifer Faber, Jörg B. Schulz, Kathrin Reetz, Sandro Romanzetti, on behalf of the FACROSS study group, Stella A. Lischewski, Kerstin Konrad, Miguel Pishnamaz, Maximillian Praster, Thomas Clavel, Vera Jankowski, Joachim Jankowski, Oliver Pabst, Katharina Marx‐Schütt, Nikolaus Marx, Julia Möllmann, Malte Jacobsen, Juergen Dukart, Simon Eickhoff, Ralf‐Dieter Hilgers   +22 more
wiley   +1 more source

Functional response predicts invasiveness but not trophic impact

Journal of Animal Ecology, EarlyView.
This comparative analysis challenges the current paradigm that pre‐invasion functional response magnitude serves as a reliable predictor of post‐invasion ecological impact and highlights the need to distinguish between pre‐adaptation in native ranges and realized performance in invaded ecosystems.
Marine A. Courtois, Chloé Souques, Yann Voituron, Loïc Teulier, Vincent Médoc, François‐Xavier Dechaume‐Moncharmont   +5 more
wiley   +1 more source

Extragalactic Results from the Infrared Space Observatory

, 2000
More than a decade ago the IRAS satellite opened the realm of external galaxies for studies in the 10 to 100 micron band and discovered emission from tens of thousands of normal and active galaxies.
Acosta-Pulido JA, Afonso C, Alexander T, Altieri B, Alton PB, Aussel H, Aussel H, Awaki H, Binette L, Boller T, Boselli A, Boselli A, Boulade O, Braine J, Catherine J. Cesarsky, Cesarsky CJ, Cesarsky D, Cesarsky D, Chapman SC, Clavel J, Clegg PE, Clements DL, Contursi A, de Graauw T, Desert FX, Desert FX, Doherty RM, Duley WW, Efstathiou A, Elbaz D, Fadda D, Fischer J, Flores H, Franceschini A, Gilmore G, Haas M, Haas M, Haas M, Hippelein H, Kawara K, Kegel WH, Kessler MF, Knapp GR, Krügel E, Kunze D, Lagache G, Lagache G, Lagache G, Lai O, Laureijs RJ, Laurent O, Laurent O, Lemke D, Lemonon L, Lord SD, Lutz D, Lutz D, Lutz D, Lutz D, Mattila K, Mattila K, Metcalfe L, Mirabel IF, Mirabel IF, Moorwood AFM, Moorwood AFM, Najarro F, Nakagawa T, Oliva E, Pagani L, Pfenniger D, Puget JL, Puget JL, Radovich M, Reinhard Genzel, Rigopoulou D, Rigopoulou D, Rigopoulou D, Rodriguez Espinosa JM, Rouan D, Roussel H, Rowan-Robinson M, Schaerer D, Scott D, Scoville NZ, Serjeant S, Siebenmorgen R, Stickel M, Sturm E, Sturm E, Taniguchi Y, Taniguchi Y, Tecza M, Thornley MD, Tran DQ, Tuffs RJ, Unger SJ, Valentijn EA, Verstraete L, Viegas SM, Vignati P, Vigroux L, Walter R, Wilkes BJ   +103 more
core   +1 more source

Far-UV Observations of NGC 4151 during the ORFEUS-SPAS II Mission [PDF]

, 1997
We observed the Seyfert 1 galaxy NGC 4151 on eleven occasions at 1-2 day intervals using the Berkeley spectrometer during the ORFEUS-SPAS II mission in 1996 November.
A. F. Davidsen, B. R. Espey, Bromage G., G. A. Kriss, Hurwitz M., J. H. Krolik, Ulrich M. H., W. Zheng, Z. Tsvetanov   +8 more
core   +2 more sources

Functional homogenization of terrestrial mammals outside protected areas in the Hengduan Mountains, China

Conservation Biology, EarlyView.
Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li, Wenqiang Hu, Kenneth Otieno Onditi, Quan Li, Zhechang Hu, Ru Bai, Yang Liu, Hongjiao Wang, Xuelong Jiang   +8 more
wiley   +1 more source

The Nature of the Emission Components in the Quasar/NLS1 PG1211+143 [PDF]

, 2001
We present the study of the emission properties of the quasar PG1211+143, which belongs to the class of Narrow Line Seyfert 1 galaxies. On the basis of observational data analyzed by us and collected from the literature, we study the temporal and ...
A. Janiuk, B. Czerny, Barbieri C., Brandt W. N., Czerny B., Czerny B., Czerny B., Dumont A.-M., G. M. Madejski, George I. M., Honma F., Krolik J. H., Laor A., Lawson A. J., Madej J., Madej J., Pounds K., Pringle J. E., Roanska A., Saxton R. D., Shakura N. I., Walter R., Yaqoob T., Yaqoob T., ycki P. T., Yuan W.   +25 more
core   +3 more sources

Geographic risks to functional groups of mammals and birds from habitat loss in Mexico

Conservation Biology, EarlyView.
Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás, Francisco Botello, Claudia E. Moreno, Griselda Escalona‐Segura, Víctor Sánchez‐Cordero   +4 more
wiley   +1 more source