Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Devdeep Sarkar"'
Autor:
Devdeep Sarkar, Joshua D. Younger
Publikováno v:
The Journal of Trading. 10:57-64
Recent bouts of volatility in the Treasury market, exacerbated by stubbornly depressed liquidity, have caught the attention of a large number of market participants. In this article, the authors compare several popular measures of U.S. Treasury marke
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b488bf56d5d4550598130534f1539ee
https://doi.org/10.3905/jot.2015.10.3.057
https://doi.org/10.3905/jot.2015.10.3.057
Autor:
Devdeep Sarkar, Alexandre Amblard, Shahab Joudaki, Scott T. Sullivan, Daniel E. Holz, Asantha Cooray
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 194:307-319
One of the most viable explanations for the accelerated expansion of the universe at the present epoch entails a mysterious dark energy component in the energy budget of the universe. Although the existence of dark energy has been corroborated by sev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5762d1297fb2825242e394352b48322f
https://doi.org/10.1016/j.nuclphysbps.2009.07.031
https://doi.org/10.1016/j.nuclphysbps.2009.07.031
Autor:
Weidong Li, Hubert Lampeitl, Henry C. Ferguson, Stefano Casertano, Saurabh Jha, Alexei V. Filippenko, Lucas M. Macri, Ryan Chornock, Adam G. Riess, M. Sosey, Devdeep Sarkar
Publikováno v:
The Astrophysical Journal. 699:539-563
We report observations of 240 Cepheid variables obtained with the Near Infrared Camera (NICMOS) through the F160W filter on the Hubble Space Telescope (HST). The Cepheids are distributed across six recent hosts of Type Ia supernovae (SNe Ia) and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96c6b04e0ce16060e6217a3f0526a452
https://doi.org/10.1088/0004-637x/699/1/539
https://doi.org/10.1088/0004-637x/699/1/539
Publikováno v:
The Astrophysical Journal. 684:L13-L16
Recent work suggests that Type Ia supernovae (SNe) are composed of two distinct populations: prompt and delayed. By explicitly incorporating properties of host galaxies, it may be possible to target and eliminate systematic differences between these
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e053f7d65004bc81b574d9acc7ede2a
https://doi.org/10.1086/592019
https://doi.org/10.1086/592019
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 375:691-697
We present an analysis comparing the bulk--flow measurements for six recent peculiar velocity surveys, namely, ENEAR, SFI, RFGC, SBF and the Mark III singles and group catalogs. We study whether the direction of the bulk--flow estimates are consisten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c50351ba5765af3d9443a2eeecd4486
https://doi.org/10.1111/j.1365-2966.2006.11334.x
https://doi.org/10.1111/j.1365-2966.2006.11334.x
On large angular scales (greater than about 60 degrees), the two-point angular correlation function of the temperature of the cosmic microwave background (CMB), as measured (outside of the plane of the Galaxy) by the Wilkinson Microwave Anisotropy Pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::361a45b2d0565693e384224726a5c78f
https://pub.uni-bielefeld.de/record/1967062
https://pub.uni-bielefeld.de/record/1967062
Autor:
Stefania Pandolfi, Paolo Serra, Daniel E. Holz, Asantha Cooray, Devdeep Sarkar, Alessandro Melchiorri
We use a variant of principal component analysis to investigate the possible temporal evolution of the dark energy equation of state, w(z). We constrain w(z) in multiple redshift bins, utilizing the most recent data from Type Ia supernovae, the cosmi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e90d9b20fde3bafc9573b9e5be85848
http://arxiv.org/abs/0908.3186
http://arxiv.org/abs/0908.3186
Publikováno v:
Physical Review D. 77
Weak gravitational lensing by foreground density perturbations generates a gradient mode in the shear of background images. In contrast, cosmological tensor perturbations induce a non-zero curl mode associated with image rotations. In this note, we s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ebafe66f2c0b4ec00de7a504e40d4846
https://doi.org/10.1103/physrevd.77.103515
https://doi.org/10.1103/physrevd.77.103515
The cosmic microwave background (CMB) bispectrum is a well-known probe of the non-Gaussianity of primordial perturbations. Just as the intervening large-scale structure modifies the CMB angular power spectrum through weak gravitational lensing, the C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c79fef1682078f892b043433c02da94
http://arxiv.org/abs/0803.4194
http://arxiv.org/abs/0803.4194
The gravitational magnification and demagnification of Type Ia supernovae (SNe) modify their positions on the Hubble diagram, shifting the distance estimates from the underlying luminosity-distance relation. This can introduce a systematic uncertaint
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bba3d6b8933e5cd6e3ffa1e3cdd39667
http://arxiv.org/abs/0710.4143
http://arxiv.org/abs/0710.4143