Results 11 to 20 of about 67,348 (230)

Multiwavelength observations of the M15 intermediate-velocity cloud [PDF]

Monthly Notices of the Royal Astronomical Society, 2002
We present Westerbork Synthesis Radio Telescope HI images, Lovell Telescope multibeam HI wide-field mapping, Wisconsin H-alpha Mapper facility images, William Herschel Telescope longslit echelle CaII observations, and IRAS ISSA 60 and 100 micron coadded images towards the intermediate velocity cloud located in the general direction of the M15 globular ...
Keenan, Francis, Smoker, Jonathan, Pollacco, Don, Haffner, L.M., Davies, R.D.   +4 more
openaire   +3 more sources

The Abundances Of Neutron-Capture Species In The Very Metal-Poor Globular Cluster M15: A Uniform Analysis Of Red Giant Branch And Red Horizontal Branch Stars [PDF]

, 2011
The globular cluster M15 is unique in its display of star-to-star variations in the neutron-capture elements. Comprehensive abundance surveys have been previously conducted for handfuls of M15 red giant branch (RGB) and red horizontal branch (RHB) stars.
Burley, Gregory S., Cowan, John J., Kraft, Robert P., Preston, George W., Shectman, Stephen A., Smith, Graeme H., Sneden, Christopher, Sobeck, Jennifer S., Thompson, Ian B.   +8 more
core   +1 more source

The Discovery of a Second Luminous Low Mass X-ray Binary in the Globular Cluster M15 [PDF]

, 2001
We report an observation by the Chandra X-ray Observatory of 4U2127+119, the X-ray source identified with the globular cluster M15. The Chandra observation reveals that 4U2127+119 is in fact two bright sources, separated by 2.7". One source is associated
Angelini, Lorella, White, Nicholas E.
core   +2 more sources

Minimization of multi-penalty functionals by alternating iterative thresholding and optimal parameter choices [PDF]

, 2014
Inspired by several recent developments in regularization theory, optimization, and signal processing, we present and analyze a numerical approach to multi-penalty regularization in spaces of sparsely represented functions.
Naumova, Valeriya, Peter, Steffen
core   +1 more source

Characterizing the Chemistry of the Milky Way Stellar Halo: Detailed Chemical Analysis of a Metal-Poor Stellar Stream [PDF]

, 2010
We present the results of a detailed abundance analysis of one of the confirmed building blocks of the Milky Way stellar halo, a kinematically-coherent metal-poor stellar stream. We have obtained high resolution and high S/N spectra of 12 probable stream
Aoki, Arlandini, Beers, Bell, Belokurov, Belokurov, Belokurov, Biémont, Biémont, Biémont, Blackwell, Blackwell, Blackwell, Booth, Brown, Carlin, Carney, Carney, Castelli, Chiba, Chou, Chou, Christopher Sneden, Cohen, Cohen, Cohen, Cohen, Da Costa, Demarque, Den Hartog, Den Hartog, Farouqi, Frebel, Frebel, Frebel, Fuhr, Fulbright, Gallino, Geha, George W. Preston, Grevesse, Griffin, Grillmair, Grillmair, Grillmair, Han, Hannaford, Honda, Ian B. Thompson, Ian U. Roederer, Ivans, Ivarsson, Keeping, Kepley, Kirby, Klement, Kratz, Kurucz, Lai, Lawler, Lawler, Lawler, Lawler, Lawler, Lawler, Lawler, Lawler, Lee, Li, Lynden Bell, Majewski, Martinson, Martínez-Delgado, Milone, Morrison, Nahar, Newberg, Newberg, Nitz, Norris, Odenkirchen, Pickering, Pickering, Piotto, Preston, Roederer, Roederer, Roederer, Sadakane, Schatz, Shetrone, Skrutskie, Smith, Sneden, Sneden, Sneden, Sneden, Sobeck, Spite, Starkenburg, Stephen A. Shectman, Takeda, Vivas, Wallerstein, Whaling, Yanny, York, Zhang, Zucker   +108 more
core   +2 more sources

Small-Scale Interstellar Na I Structure Toward M92 [PDF]

, 2001
We have used integral field echelle spectroscopy with the DensePak fiber-optic array on the KPNO WIYN telescope to observe the central 27" x 43" of the globular cluster M92 in the Na I D wavelength region at a spatial resolution of 4".
David M. Meyer, J. T. Lauroesch, Lilienthal D., Mar D. P., Pilachowski C., Roth K. C., Sean M. Andrews   +6 more
core   +3 more sources

A Physical Model for SN 2001ay, a normal, bright, extremely slowly declining Type Ia supernova [PDF]

, 2012
We present a study of the peculiar Type Ia supernova 2001ay (SN 2001ay). The defining features of its peculiarity are: high velocity, broad lines, and a fast rising light curve, combined with the slowest known rate of decline.
Baron, E., Dominguez, I., Hoeflich, P., Khokhlov, A. M., Krisciunas, K., Phillips, M. M., Suntzeff, N., Wang, L.   +7 more
core   +3 more sources

Stellar Populations and Mass-Loss in M15: A Spitzer Detection of Dust in the Intra-Cluster Medium [PDF]

, 2006
We present Spitzer Space Telescope IRAC and MIPS observations of the galactic globular cluster M15 (NGC 7078), one of the most metal-poor clusters with a [Fe/H] = -2.4. Our Spitzer images reveal a population of dusty red giants near the cluster center, a
A. Evans, Adams S., Auriere M., Birkinshaw M., Charles E. Woodward, Elisha F. Polomski, Hopwood M. E. L., Howard J. W., Hummer D. G., Hummer D. G., Jacco Th. van Loon, Karl D. Gordon, L. Andrew Helton, Martha L. Boyer, Ossenkopf V., Pena M., Rank D. M., Robert D. Gehrz, Saraph H. E., Seaton M. J., Sun X.-H., Trams N. R., van Loon J. Th., van Loon J. Th., van Loon J. Th., Zijlstra A. A.   +25 more
core   +3 more sources

The Challenges of Smart Tourism: A Case of Bucharest

Studia Universitatis Vasile Goldis Arad, Seria Stiinte Economice, 2020
The advancement of technology makes smart devices and their applications ever more popular and complex. Tourism is an area where varied and numerous services are required, hence this diversity resulted in a multitude of smart applications and smart ...
Sabou Gabriel-Cristian, Maiorescu Irina
doaj   +1 more source

“Every knock is a boost”. Cyber risk behaviour among Poles

Economics and Business Review, 2021
The purpose of this study is to evaluate the safety of individuals’ behaviour in the cyber world, especially when using financial services. The article focuses on knowledge of cybersecurity issues, cyber risk awareness and respondents’ self-assessment as
Cichowicz Ewa, Iwanicz-Drozdowska Małgorzata, Kurowski Łukasz   +2 more
doaj   +1 more source