Results 11 to 20 of about 26,637 (266)

The Infrared and X-Ray Continua of Quasars: Is there a Connection ? [PDF]

Symposium - International Astronomical Union, 1989
The first Einstein IPC X-ray spectra of quasars had slopes similar to their infrared spectra (Elvis et al. 1986) suggesting that the infrared and x-ray continua of quasars might be two ends of a single power-law extending over at least 4 decades of the electromagnetic spectrum.
Martin Elvis, Jonathan McDowell, Belinda J. Wilkes   +2 more
openaire   +1 more source

The Mid‐Infrared Properties of X‐Ray Sources [PDF]

The Astrophysical Journal, 2008
We combine the results of the Spitzer IRAC Shallow Survey and the Chandra XBootes Survey of the 8.5 square degrees Bootes field of the NOAO Deep Wide- Field Survey to produce the largest comparison of mid-IR and X-ray sources to date. The comparison is limited to sources with X-ray fluxes >8x10-15 erg cm-2s-1 in the 0.5-7.0 keV range and mid-IR ...
Gorjian, V., Brodwin, M., Kochanek, C. S., Murray, S., Stern, D., Brand, K., Eisenhardt, P. R., Ashby, M. L. N., Barmby, P., Brown, M. J. I., Dey, A., Forman, W., Jannuzi, B. T., Jones, C., Kenter, A. T., Pahre, M. A., Shields, J. C., Werner, M. W., Willner, S. P.   +18 more
openaire   +2 more sources

The influence of galactic cosmic rays on ion-neutral hydrocarbon chemistry in the upper atmospheres of free-floating exoplanets

, 2014
The authors highlight financial support of the European Community under the FP7 by an ERC starting grant.Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry.
P. B. Rimmer, C. Bilger, Rimmer, P.B., Helling, C., Bilger, C., Ch. Helling   +5 more
core   +1 more source

The X‐Ray, Optical, and Infrared Counterpart to GRB 980703 [PDF]

The Astrophysical Journal, 1999
We report on X-ray, optical and infrared follow-up observations of GRB 980703. We detect a previously unknown X-ray source in the GRB error box; assuming a power law decline we find for its decay index alpha < -0.91 (3-sigma). We invoke host galaxy extinction to match the observed spectral slope with the slope expected from `fireball' models.
Vreeswijk P. M., Galama T. J., Owens A., Oosterbroek T., Geballe T. R., van Paradijs J., Groot P. J., Kouveliotou C., Koshut T., Tanvir N., Wijers R. A. M. J., Pian E., Palazzi E., Frontera F., Masetti N., Robinson C., Briggs M., in 't Zand J. J. M., Heise J., Piro L., Costa E., Feroci M., Antonelli L. A., Hurley K., Greiner J., Smith D. A., Levine A. M., Lipkin Y., Leibowitz E., Lidman C., PIZZELLA, ALESSANDRO, Böhnhardt H., Doublier V., Chaty S., Smail I., Blain A., Hough J. H., Young S., Suntzeff N.   +38 more
openaire   +5 more sources

Infrared-Selected “Warm” Galaxies Observed in X-rays [PDF]

Symposium - International Astronomical Union, 1989
The Infrared Astronomical Satellite (IRAS) has detected many galaxies in the infrared (IR), most of which have fairly steep 25μ to 60μ spectra. Many quasars and active galaxies exhibit a significantly flatter spectrum in the infrared. Several studies, for example, DeGrijp et al.
Green, P.J., Ward, M., Anderson, S.F., Margon, B., Grijp, M.H.K. de, Miley, G.K.   +5 more
openaire   +3 more sources

UiO‐66 metal–organic frameworks in biomedicine: From structural tunability to bioimaging, photodiagnostics, and photodynamic cancer therapy

FEBS Open Bio, EarlyView.
UiO‐66(Zr) metal–organic frameworks are chemically stable, biocompatible, and highly tunable nanomaterials. Their modular structure enables controlled drug delivery, multimodal bioimaging, and light‐activated photodynamic therapy, supporting integrated diagnostic and therapeutic (theranostic) applications in cancer and biomedical research.
Veronika Huntošová, Grigorii Rakhalskii, Miroslav Almáši   +2 more
wiley   +1 more source

An infrared flash contemporaneous with the γ-rays of GRB 041219a [PDF]

Nature, 2005
The explosion that results in a cosmic gamma-ray burst (GRB) is thought to produce emission from two physical processes: the central engine gives rise to the high-energy emission of the burst through internal shocking, and the subsequent interaction of the flow with the external environment produces long-wavelength afterglows.
Blake, C. H., Bloom, J. S., Starr, D. L., Falco, E. E., Skrutskie, M., Fenimore, E. E., Duchêne, G., Szentgyorgyi, A., Hornstein, S., Prochaska, J. X., Mccabe, C., Ghez, A., Konopacky, Q., Stapelfeldt, K., Hurley, K., Campbell, R., Kassis, M., Chaffee, F., Gehrels, N., Barthelmy, S., Cummings, J. R., Hullinger, D., Krimm, H. A., Markwardt, C. B., Palmer, D., Parsons, A., Mclean, K., Tueller, J.   +27 more
openaire   +3 more sources

Hyperactive ice‐binding proteins stabilize cell membranes and improve resistance to dehydration stress in Caenorhabditis elegans

FEBS Open Bio, EarlyView.
TisIBP8, a fungal‐derived hyperactive ice‐binding protein, helps Caenorhabditis elegans survive dehydration. It localizes near cell membranes, reduces cell damage, and helps maintain membrane structure during drying. These results suggest that ice‐binding proteins can protect cells from dehydration stress as well as freezing stress.
Daiki Shimose, Kotaro Ozaki, Ryohei Kuriyama, Yuka Ikemoto, Kazuhiro Mio, Yuji C. Sasaki, Tatsuya Arai, Sakae Tsuda, Yoichi Shinkai, Masahiro Kuramochi   +9 more
wiley   +1 more source

Preparation, purification and characterization of aminopropyl-functionalized silica sol

, 2013
A new, simple and “green” method was developed for the surface modification of 20 nm diameter Stöber silica particles with 3-aminopropyl(diethoxy)methylsilane in ethanol. The bulk polycondensation of the reagent was inhibited and the stability of the sol
Nagy Naszályi, Lívia, Kiss, Teréz, Tárkányi, Gábor, Kremmer, Tibor, Mizsei, Réka, Pálmai, Marcell, Bóta, Attila, Varga, Zoltán, Mihály, Judith, Szigyártó, Imola Csilla   +9 more
core   +1 more source

Infrared Dichroism from the X-Ray Structure of Bacteriorhodopsin [PDF]

Biophysical Journal, 2001
A detailed comparison with the three-dimensional protein structure provides a stringent test of the models and parameters commonly used in determining the orientation of the alpha-helices from the linear dichroism of the infrared amide bands, particularly in membranes.
Marsh, D., Pali, T.
openaire   +3 more sources