Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Denissenya, Mikhail"'
Autor:
Park, Sangwoo, Shafieloo, Arman, Bag, Satadru, Denissenya, Mikhail, Linder, Eric V., Ranjan, Adarsh
Publikováno v:
JCAP 11 (2024) 037
Internal kinematics of galaxies, traced through the stellar rotation curve or two dimensional velocity map, carry important information on galactic structure and dark matter. With upcoming surveys, the velocity map may play a key role in the developm
Externí odkaz:
http://arxiv.org/abs/2404.16401
Publikováno v:
JCAP 2402, 018 (2024)
Dark matter dominates the matter budget of the universe but its nature is unknown. Deviations from the standard model, where dark matter clusters with the same gravitational strength as baryons, and has the same pressureless equation of state as bary
Externí odkaz:
http://arxiv.org/abs/2311.13795
We develop a model independent, robust method for determining galaxy rotation velocities across a 2D array of spaxels from an integral field spectrograph. Simulations demonstrate the method is accurate down to lower spectral signal-to-noise than stan
Externí odkaz:
http://arxiv.org/abs/2311.00030
Publikováno v:
JCAP 2309, 013 (2023)
Cosmic acceleration manifested in the early universe as inflation, generating primordial gravitational waves detectable in the cosmic microwave background (CMB) radiation. Cosmic acceleration is occurring again at present as dark energy, detectable i
Externí odkaz:
http://arxiv.org/abs/2306.03154
Autor:
Denissenya, Mikhail, Linder, Eric V.
Publikováno v:
JCAP 2211, 029 (2022)
Ongoing and future redshift surveys have the capability to measure the growth rate of large scale structure at the percent level over a broad range of redshifts, tightly constraining cosmological parameters. Beyond general relativity, however, the gr
Externí odkaz:
http://arxiv.org/abs/2208.10508
Autor:
Denissenya, Mikhail, Linder, Eric V.
Publikováno v:
MNRAS 515, 977 (2022)
Gravitationally lensed sources may have unresolved or blended multiple images, and for time varying sources the lightcurves from individual images can overlap. We use convolutional neural nets to both classify the lightcurves as due to unlensed, doub
Externí odkaz:
http://arxiv.org/abs/2202.11903
Gravitationally lensed Type Ia supernovae are an emerging probe with great potential for constraining dark energy, spatial curvature, and the Hubble constant. The multiple images and their time delayed and magnified fluxes may be unresolved, however,
Externí odkaz:
http://arxiv.org/abs/2109.13282
Publikováno v:
Phys. Rev. D 104, 023007 (2021)
Many astrophysical bursts can recur, and their time series structure or pattern could be closely tied to the emission and system physics. While analysis of periodic events is well established, some sources, e.g. some fast radio bursts and soft gamma-
Externí odkaz:
http://arxiv.org/abs/2103.10618
Autor:
Denissenya, Mikhail, Linder, Eric V.
Publikováno v:
The Open Journal of Astrophysics, Vol. 4, November 05, 2021
Ultra Fast Astronomy is a new frontier becoming enabled by improved detector technology allowing discovery of optical transients on millisecond to nanosecond time scales. These may reveal counterparts of energetic processes such as fast radio bursts,
Externí odkaz:
http://arxiv.org/abs/2101.02714
Autor:
Denissenya, Mikhail, Linder, Eric V.
Cosmic acceleration may be due to modified gravity, with effective field theory or property functions describing the theory. Connection to cosmological observations through practical parametrization of these functions is difficult and also faces the
Externí odkaz:
http://arxiv.org/abs/1808.00013