Results 21 to 30 of about 1,399 (188)
On the Population of Wind-accreting Neutron Stars in the Galaxy
The Astrophysical Journal, 2002 We explore the possibility that neutron stars accreting from the winds of main-sequence stellar companions account for a significant fraction of low-luminosity, hard X-ray sources ...
Pfahl, E, Rappaport, S, Podsiadlowski, P
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Lopsided Spiral Galaxies and a Limit on the Galaxy Accretion Rate [PDF]
The Astrophysical Journal, 1997 We present a measurement of lopsidedness for the stellar disks of 60 field spiral galaxies in terms of the azimuthal m=1 Fourier amplitude, A_1, of the stellar light. We conjecture that this lopsidedness is caused by tidal interactions and calculate an UPPER limit on the accretion rate of small galaxies.
Zaritsky, Dennis, Rix, Hans-Walter
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Angular Momentum Accretion onto Disc Galaxies [PDF]
Proceedings of the International Astronomical Union, 2018 AbstractThroughout the Hubble time, gas makes its way from the intergalactic medium into galaxies fuelling their star formation and promoting their growth. One of the key properties of the accreting gas is its angular momentum, which has profound implications for the evolution of, in particular, disc galaxies.
Fraternali, Filippo, Pezzulli, Gabriele
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Star formation and gas accretion in nearby galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 In order to quantify the relationship between gas accretion and star formation, we analyse a sample of 29 nearby galaxies from the WHISP survey which contains galaxies with and without evidence for recent gas accretion. We compare combined radial profiles of FUV (GALEX) and IR 24 μm (Spitzer) characterizing distributions of recent star formation with ...
Kijeong Yim, J. M. van der Hulst
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Unification of Radio Galaxies and their Accretion Jet Properties [PDF]
Journal of Astrophysics and Astronomy, 2011 We investigate the relation between black hole mass, M_bh, and jet power, Q_jet, for a sample of BL Lacs and radio quasars. We find that BL Lacs are separated from radio quasars by the FR I/II dividing line in M_bh-Q_jet plane, which strongly supports the unification scheme of FR I/BL Lac and FR II/radio quasar.
Wu, Qingwen, Xu, Ya-Di, Cao, Xinwu
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The gravitational microlens influence on X-ray spectral line generated by an AGN accretion disc [PDF]
Serbian Astronomical Journal, 2001 The influence of gravitational microlensing on the X-ray spectral line profiles originated from a relativistic accretion disc has been studied. Using a disc model, we show that microlensing can induce noticeable changes in the line shapes when the ...
Popović L.Č. +4 more
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Discovery of a Low-redshift Hot Dust-obscured Galaxy
The Astrophysical Journal, 2023 We report the discovery of the hyperluminous, highly obscured active galactic nuclei (AGN) WISE J190445.04+485308.9 (W1904+4853, hereafter, L _bol ∼ 1.1 × 10 ^13 L _⊙ ) at z = 0.415.
Guodong Li +12 more
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Stellar streams around dwarf galaxies in the local Universe
Astronomy & AstrophysicsContext. While mergers between massive galaxies and their dwarf satellites have been well studied, the properties of dwarf–dwarf satellite mergers are not well constrained.
Sakowska Joanna D. +8 more
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A Multiwavelength Technique for Estimating Galaxy Cluster Mass Accretion Rates
The Astrophysical JournalThe mass accretion rate of galaxy clusters is a key factor in determining their structure, but a reliable observational tracer has yet to be established.
John Soltis +9 more
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Advanced Science, EarlyView.An electronics‐free smart scleral lens passively monitors dry eye disease‐related tear biomarkers through colorimetric sensing of chloride, pH, and ocular surface temperature. Smartphone‐assisted image analysis enables quantitative interpretation, providing a simple, non‐invasive strategy for ocular health monitoring without integrated electronics ...
Ziheng Wang +15 more
wiley +1 more source