Results 81 to 90 of about 593,443 (246)

Detecting Intermediate-Mass Black Holes out to 20 Mpc with ELT/HARMONI: The Case of FCC 119

Universe
Intermediate-mass black holes (IMBHs; MBH≈103–5 M⊙) play a critical role in understanding the formation of supermassive black holes in the early universe.
Hai N. Ngo, Dieu D. Nguyen, Tinh T. Q. Le, Tien H. T. Ho, Truong N. Nguyen, Trung H. Dang   +5 more
doaj   +1 more source

Photometry and Classification of Stars in the Direction of Clusters NGC 7129 and NGC 7142 in Cepheus. I. Magnitudes, Color Indices and Spectral Types of 2140 Stars

Open Astronomy, 2012
In a 1.5 square degree area, centered at RA = 21:44:30, DEC = +65:58, we have determined magnitudes and color indices for 2140 stars in the Vilnius seven-color system down to V = 17 mag.
Maskoliūnas M., Zdanavičius J., Zdanavičius K., Straižys V.   +3 more
doaj   +1 more source

A statistical study of the luminosity gap in galaxy groups

, 2010
The luminosity gap between the two brightest members of galaxy groups and clusters is thought to offer a strong test for the models of galaxy formation and evolution.
Ghanbari, Jamshid, Khosroshahi, Habib G., Koohpaee, Ali, Rahmani, Hadi, Tavasoli, Saeed   +4 more
core   +1 more source

Testing redMaPPer centring probabilities using galaxy clustering and galaxy–galaxy lensing [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
Galaxy cluster centring is a key issue for precision cosmology studies using galaxy surveys. Mis-identification of central galaxies causes systematics in various studies such as cluster lensing, satellite kinematics, and galaxy clustering. The red-sequence Matched-filter Probabilistic Percolation (redMaPPer) estimates the probability that each member ...
Chiaki Hikage, Rachel Mandelbaum, Alexie Leauthaud, Eduardo Rozo, Eli S Rykoff   +4 more
openaire   +2 more sources

Star Formation Histories with Gaia: The Galaxy and Beyond

Open Astronomy, 2003
ESA’s Gaia mission will provide accurate astrometric, photometric and spectroscopic data for millions of stars in the Galaxy and beyond. We discuss the prospects of using this vast amount of astrophysical information for understanding star formation ...
Kučinskas A., Lindegren L., Tanabé T., Vansevičius Savanorių   +3 more
doaj   +1 more source

Communication rules regarding support seeking in patients with a physical illness, according to people with a Surinamese or a Dutch cultural background

Journal of Migration and Health
Objective: People with different cultural backgrounds can evaluate the appropriateness of direct and indirect support seeking differently. In this study we explored how direct and indirect communication rules for verbal support seeking by patients with ...
Galaxy Rokadji, Arie Dijkstra
doaj   +1 more source

RELATION OF DAILY PERIODS OF VLF RADIATION WITH X-RAY SOURCES

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2016
Spectral analysis of electromagnetic noise radiation in the VLF range at three fixed frequencies for the period from 1997 to 2015 have been carried out. Periodograms with diurnal components associated with the periods of the Earth rotation relatively the
Druzhin, G.I., Stasiy, I.E.
doaj   +1 more source

Dynamical Evolution of Elliptical Galaxies with Central Singularities

, 1997
We study the effect of a massive central singularity on the structure of a triaxial galaxy using N-body simulations. Starting from a single initial model, we grow black holes with various final masses Mh and at various rates, ranging from impulsive to ...
Allen A. J., Bender R., Binney J. J., David Merritt, Dehnen W., Eckart A., Friedli D., Gerald D. Quinlan, Gerhard O. E., Goodman J., Kaufmann D. E., Kormendy J., Lynden-Bell D., May A., Noguchi M., Pfenniger D., Pfenniger D., Soltan A., Udry S., Udry S.   +19 more
core   +2 more sources

UV-Galaxies [PDF]

Symposium - International Astronomical Union, 1983
At the present time the previously used term “Peculiar galaxy” is gradually being replaced by the term “active” galaxy. This is quite natural, because the overwhelming majority of “peculiar” galaxies turned out to be “active” at the same time. The opposite is not correct: there are a lot of examples where a galaxy looking normal is physically active.
openaire   +2 more sources

Environmental dependence of stellar velocity dispersion in the Main galaxy sample of SDSS DR10

Open Physics, 2014
The aim of this work is to examine the environmental dependence of stellar velocity dispersion in local galaxies. In studies that likely suffer from the radial selection effect, one has a preference for the use of volumelimited samples.
Deng Xin-Fa
doaj   +1 more source