Results 31 to 40 of about 235,164 (217)

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
openaire   +2 more sources

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
openaire   +2 more sources

Galaxy discs as accretion discs [PDF]

, 2021
Accretion and accretion discs around compact objects such as black holes and neutron stars are well studied phenomena, but galactic discs have rarely been examined as accretion discs, despite showing clear evidence of radial mass inflow.
Halldórsson, Bergur
core  

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
openaire   +3 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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., Mediavilla E.G., Munoz J.A., Dimitrijević M.S., Jovanović P.   +4 more
doaj   +1 more source

Stellar streams around dwarf galaxies in the local Universe

Astronomy & Astrophysics
Context. 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., Martínez-Delgado David, Pearson Sarah, Riquel-Castilla Francisco J., Starkenburg Tjitske K., Donatiello Giuseppe, Deason Alis, Erkal Denis, Taylor Ethan D.   +8 more
doaj   +1 more source

Broad line emission from iron K- and L-shell transitions in the active galaxy 1H 0707-495

, 2009
Since the 1995 discovery of the broad iron K-line emission from the Seyfert galaxy MCG-6-30-15 (ref. 1), broad iron K lines have been found in emission from several other Seyfert galaxies, from accreting stellar-mass black holes and even from accreting ...
T. Boller, Reynolds, C., Tanaka, Y, Larsson, J., Reynolds, C.S., Boller, T., Zoghbi, A., Y. Tanaka, G. Miniutti, Brandt, W.N., Zoghbi, A, Blustin, A., Reis, R.C., W. N. Brandt, Ponti, G, Ross, R., Uttley, P., Cadallero-Garcia, M., C. S. Reynolds, Blustin, A. J., Caballero-Garcia, M.D., Young, A.J., P. Uttley, Reynolds, C.S, Miller, J.M., Ross, R.R., A. C. Fabian, Uttley, P, Tanaka, Y., Young, A.J, L. C. Gallo, J. M. Miller, Miniutti, G, Brandt, W. N., G. Ponti, Fabian, A.C., Brandt, W, Blustin, A.J, Reis, R., Reis, R. C., Blustin, A.J., A. J. Blustin, J. Larsson, Ross, R. R., Miller, J.M, A. Zoghbi, R. C. Reis, M. D. Caballero-Garcia, A. J. Young, Ross, R.R, Miller, Jon M., Brandt, W., Gallo, L. C., Fabian, A., Caballero-Garcia, M. D., Ponti, G., Miniutti, G., Larsson, J, R. R. Ross, Gallo, L., Young, A., Fabian, A.C, Fabian, Andy C., Caballero-Garcia, M.D, Boller, T, Reynolds, Christopher S., Miniutti, Giovanni, Gallo, L.C., Miller, J., Reis, R.C, Young, A. J.   +70 more
core   +1 more source

Continuum Robots in Surgery: From Engineering Design to Clinical Practice

Advanced Robotics Research, EarlyView.
The hyper‐redundant nature of continuum robot structures enables near‐infinite degrees of freedom leading to immense potential for medical applications. This review provides a historical background of continuum robots and novel ideas shaping their progress to current structural design, sensing technology, modeling techniques, and control methods.
Griffin Smith, Kaitlyn Clancy, Siwen Xie, Xiaochen Li, Sarah Khalife, Benjamin van der Woerd, Onaizah Onaizah   +6 more
wiley   +1 more source