For both NGC 2403 and NGC 4236 the extert of their H I distributions, as defined by 20% contour levels, is coincident with their optical extent. Both distributions ... galaxy's mass lies outside its optical radius. NGC 4236, assumed to be a barred spiral, exhibits solid- ... these objects are l0% (NGC 2403) and 9% (NGC 4236). (auth)
Tópico(s): Astrophysics and Star Formation Studies
1973 - EDP Sciences | Astronomy and Astrophysics
D. Pierini, G. Gavazzi, A. Boselli, R. Tuffs,
... three nearby galaxies NGC 2366, NGC 2403 and NGC 4236, used as local calibrators of the Tully-Fisher ...
Tópico(s): Adaptive optics and wavefront sensing
1997 - EDP Sciences | Astronomy and Astrophysics Supplement Series
Jean L. Turner, Paul T. P. Ho,
... normal spiral galaxies (Maffei 2, NGC 2403, M81, NGC 4236, NGC 4258, NGC 4736, NGC 4826, M51, M83, and ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
1994 - IOP Publishing | The Astrophysical Journal
... given for the highly resolved galaxies NGC 2366, NGC 4236, IC 2574, Ho I, and Ho II in the NGC 2403-M81 group. The data are based on ...
Tópico(s): History and Developments in Astronomy
1974 - IOP Publishing | The Astrophysical Journal
И. Д. Караченцев, Andrew E. Dolphin, D. Geisler, E. K. Grebel, Puragra Guhathakurta, P. W. Hodge, V. E. Karachentseva, Ata Sarajedini, Patrick Seitzer, М. Е. Шарина,
... images of the galaxies NGC 2366, NGC 2976, NGC 4236, IC 2574, DDO 53, DDO 82, DDO 165, Holmberg I, Holmberg II, Holmberg IX, K52, K73, BK3N, Garland, and A0952+69 in the M 81 complex. Their true distance moduli, derived from the brightness of the tip of the red giant branch, lie in the range of 2752 (NGC 2366) to 2830 (DDO 165), with a median ...
Tópico(s): Astrophysics and Star Formation Studies
2002 - EDP Sciences | Astronomy and Astrophysics
Tópico(s): Stellar, planetary, and galactic studies
1973 - EDP Sciences | Astronomy and Astrophysics
И. Д. Караченцев, John M. Cannon, Jackson Fuson, John L. Inoue, R. Brent Tully, Gagandeep S. Anand, С. С. Кайсин,
... M~33, NGC~2403, NGC~7793, NGC~1313, NGC~4236, NGC~5068, NGC~4656 and NGC~7640, from whose ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
2022 - Institute of Physics | The Astronomical Journal
Ts. B. Georgiev, Н. А. Тихонов, И. Д. Караченцев, V. D. Ivanov,
Abstract Magnitudes and colors of 30 star cluster candidates in three galaxies of the complex M81 – IC 342 are given, obtained from the plates obtained at the 6 m telescope. The color-magnitude diagrams of the cluster candidates are similar to those of the clusters in M33 and LMC. The apparent and absolute magnitudes of the bright cluster candidates in the galaxies studied are about 19.2 and −8.5 mag, respectively. One object in IC 2574 is very bright – its apparent and absolute magnitudes are estimated ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
1996 - Taylor & Francis | Astronomical and Astrophysical Transactions
... M33, MIol, M81, IC 1613, NGC 6822 and NGC 4236 have been investigated in detail in a similar ... while the radiation from M81, IC 1613 and NGC 4236 is very faint. The hydrogen content of irregular ...
Tópico(s): Historical Astronomy and Related Studies
1959 - Institute of Physics | The Astronomical Journal
... of magnetars, pulsars, pre-main-sequence stars, the NGC 6819 group, a number of low-to-mid mass main sequence stars, the M35 members, the NGC 2516 group, brown dwarfs, white dwarfs, magnetic white ...
Tópico(s): Geophysics and Gravity Measurements
2015 - Scientific Research Publishing | Journal of Modern Physics
Stella Patricia Betancur-Turizo, Adriana González-Silvera, Eduardo Santamaría-del-Ángel, Roberto Millán‐Núñez, Eduardo Millán-Núñez, Héctor García–Nava, Victor M. Godínez, Laura Sánchez‐Velasco,
... of California (UGC) and Northern Gulf of California (NGC). Despite the temporal changes in their spatial distribution ... stronger contribution of detritus to total light absorption. NGC is characterized by an average Chla of 0. ...
Tópico(s): Marine Biology and Ecology Research
2017 - Scientific Research Publishing | Open Journal of Marine Science
R. B. Orellana, M. S. de Biasi, L. G. Paíz,
In this paper we study some van den Bergh open clusters combining photometry and astrometry. A model which analyses the proper motion distribution and the stellar density is applied to find the kinematic parameters and stellar membership in the region of the open clusters vdB92, vdB146 (NGC 7129) and vdB150. The astrometric data are obtained from UCAC4 catalogue. The centre coordinates, the components of mean proper motion, the angular diameter and the astrometric members are reported, taking the ...
Tópico(s): Atomic and Molecular Physics
2017 - Scientific Research Publishing | International Journal of Astronomy and Astrophysics
Judy Zhong, Wei Zhao, Peng Liang, Shanfeng Li, Hong Cao,
... 359, 383-397 for dengue virus type 2 NGC strain were predicted as the more prevalent epitopes ...
Tópico(s): Viral Infections and Vectors
2009 - Scientific Research Publishing | Journal of Biomedical Science and Engineering
Steven D. Doty, Sandra L. Doty, Jeff L. Cochran, J. H. Lacy, John C. Barentine, R. D. Field,
We consider models for the observed ro-vibrational absorption lines of acetylene toward NGC 7538 IRS9. The data are fit with multiple screens, each having separate column densities, rotational and vibrational excitation temperatures, and filling factors. The best fit was determined using a chi-squared minimization scheme. We find that only one screen is necessary—multiple screens gave rise to either making one of the screens transparent, or very occasionally making the two screens the same. As a ...
Tópico(s): Atmospheric Ozone and Climate
2014 - Scientific Research Publishing | International Journal of Astronomy and Astrophysics
Happiness Mlay, J.H.Y. Katima, R. J. A Minja,
... degummed or purified JO with natural gas condensate (NGC) modifier to lower the viscosity of JO. From ...
Tópico(s): Process Optimization and Integration
2014 - Scientific Research Publishing | Open Journal of Modelling and Simulation
The cluster M67 (= NGC 2682) in Cancer is a rich stellar cluster, usually classified as an open cluster. Using our own observations with the 0.4 m telescope, we show that M67 is a tight group of about 1200 stars. The actual radius of the cluster is about 3.1 pc and the average mass of a star in the system is about . We also show that the ratio of the mean kinetic energy of the cluster to its mean gravitational potential energy , while the value predicted by the virial theorem is equal to . So the system ...
Tópico(s): Astronomy and Astrophysical Research
2012 - Scientific Research Publishing | International Journal of Astronomy and Astrophysics
... PDF model on the distribution in luminosity of NGC 2362.
Tópico(s): Astronomy and Astrophysical Research
2022 - Scientific Research Publishing | International Journal of Astronomy and Astrophysics
... presented rotational speed distributions curves of the galaxy NGC 3198. The speed distribution curve of galactic halo ...
Tópico(s): Pulsars and Gravitational Waves Research
2020 - Scientific Research Publishing | World Journal of Mechanics
Produção Nacional
... case of the 2D radial velocity field of NGC 4382 nucleus. Tilt angles of the KDC not ...
Tópico(s): Astronomy and Astrophysical Research
2016 - Scientific Research Publishing | International Journal of Astronomy and Astrophysics
... to-visible matter ratios varying from essentially zero (NGC 1052-DF2) to approximately 23-to-1 (Milky ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
2018 - Scientific Research Publishing | Journal of Modern Physics
... The rotational speed distribution curves of the galaxy NGC 3198 have been presented in Ref. [2]. The ...
Tópico(s): Mechanics and Biomechanics Studies
2023 - Scientific Research Publishing | World Journal of Mechanics
N. Kaltcheva, Kevin M. Moran, Thomas C. Gehrman, V. Golev,
... O-B9.The double cluster h & χ Per, NGC 663 and NGC 1502 are well represented in our sample.The ... found that, within the errors, h & χ Per, NGC 663, IC 1805, IC 1848 and ASCC9, together ...
Tópico(s): Astronomy and Astrophysical Research
2013 - Scientific Research Publishing | International Journal of Astronomy and Astrophysics
... luminosities of Cygnus X-1 and Seyfert galaxies (NGC 3783, NGC 4151, NGC 4486 (Messier 87)) which are powerful emitters in ...
Tópico(s): Pulsars and Gravitational Waves Research
2019 - Scientific Research Publishing | International Journal of Astronomy and Astrophysics
N. Kaltcheva, Vincent Fabbri, Timothy Conard, V. Golev,
... and Cep OB3 associations and the open clusters NGC 7243 and NGC 7654.
Tópico(s): Astro and Planetary Science
2013 - Scientific Research Publishing | International Journal of Astronomy and Astrophysics
... M.Burbidge.The sources of radio emission in NGC 5128 and NGC 1316.Astroph. J., 125,No. 1, 1–8 ( ... D.C., Smithsonian Inst. Rep. for 1955,Pub. 4236, 227–240 (1956). Google Scholar J. H.MeekRegarding ...
Tópico(s): Geological and Geochemical Analysis
1957 - American Geophysical Union | Journal of Geophysical Research Atmospheres
Shawqi Al Dallal, Walid J. Azzam,
The discovery of gravitational waves resulting from the merger of two massive black holes (GW150914) has revolutionized our view of merging compact binaries. Recently, the Swope Supernova Survey of the optical counterpart of a gravitational wave event in the NGC 4993 galaxy, GW170817, emanating from the merger of two neutron stars, has triggered a lot of research work. Emphasis has been on comparing the existing theoretical models with the observational data, allowing for the prospect of an even ...
Tópico(s): Astro and Planetary Science
2018 - Scientific Research Publishing | Journal of Modern Physics
... the fact that the M31 Galaxy and the NGC 300 Galaxy are at distances inconsistent with their ...
Tópico(s): Solar and Space Plasma Dynamics
2016 - Scientific Research Publishing | Journal of High Energy Physics Gravitation and Cosmology