Zobrazeno 1 - 10
of 4 322
pro vyhledávání: '"Wang H F"'
Autor:
Hammer, F., Yang, Y. B., Amram, P., Chemin, L., Mamon, G. A., Wang, J. L., Akib, I., Jiao, Y. J., Wang, H. F.
Mass estimates of a spiral galaxy derived from its rotation curve must account for the galaxy's past accretion history. There are several lines of evidence indicating that M31 experienced a major merger 2 to 3 Gyr ago. Here, we have generated a dynam
Externí odkaz:
http://arxiv.org/abs/2412.02737
Autor:
Hammer, F., Jiao, Y. J., Mamon, G. A., Yang, Y. B., Akib, I., Amram, P., Wang, H. F., Wang, J. L., Chemin, L.
Publikováno v:
A&A 692, L1 (2024)
Galactic halos are known to grow hierarchically, inside out. This implies a correlation between the infall lookback time of satellites and their binding energy. Cosmological simulations predict a linear relation between the infall lookback time and t
Externí odkaz:
http://arxiv.org/abs/2411.07281
AIMS. We derive the morphology of the stellar component in the outer halo volume, and search for possible overdensities due to substructures therein. METHODS. We made use of some of the data releases of the spectroscopic survey LAMOST DR8-DR9 in tand
Externí odkaz:
http://arxiv.org/abs/2402.05157
Publikováno v:
MATEC Web of Conferences, Vol 277, p 02018 (2019)
A pier foundation has plenty of advantages as the foundation form for large onshore wind turbines in the terrain of the Gobi desert and collapsible loess areas. The ultimate load bearing capacity design, as an important part in the design phase of th
Externí odkaz:
https://doaj.org/article/6ae2b337d0944ab1a62cbb65b3bce058
Autor:
Miao, C. C., Zhu, W. W., Li, D., Freire, P. C. C., Niu, J. R., Wang, P., Yuan, J. P., Xue, M. Y., Cameron, A. D., Champion, D. J., Cruces, M., Chen, Y. T., Chi, M. M., Cheng, X. F., Dang, S. J., Ding, M. F., Feng, Y., Gan, Z. Y., Hobbs, G., Kramer, M., Liu, Z. J., Li, Y. X., Luo, Z. K., Miao, X. L., Meng, L. Q., Niu, C. H., Pan, Z. C., Qian, L., Sun, Z. Y., Wang, N., Wang, S. Q., Wang, J. B., Wu, Q. D., Wang, Y. B., Wang, C. J., Wang, H. F., Wang, S., Xie, X. Y., Xie, M., Xiao, Y. F., Yuan, M., Yue, Y. L., Yao, J. M., Yan, W. M., You, S. P., Yu, X. H., Zhao, D., Zhao, R. S., Zhang, L.
We report the phase-connected timing ephemeris, polarization pulse profiles, Faraday rotation measurements, and Rotating-Vector-Model (RVM) fitting results of twelve millisecond pulsars (MSPs) discovered with the Five-hundred-meter Aperture Spherical
Externí odkaz:
http://arxiv.org/abs/2205.04232
We estimate the solar peculiar velocities and Oort constants using a sample of 5,627 A-type stars with $d<0.6\,\rm kpc$ and $|z|<0.1\,\rm kpc$, selected from the LAMOST surveys. The radial and tangential velocities of these A-type stars are fitted by
Externí odkaz:
http://arxiv.org/abs/2103.10232
In this work, 1272 superflares on 311 stars are collected from 22,539 solar-type stars from the second-year observation of Transiting Exoplanet Survey Satellite (TESS), which almost covered the northern hemisphere of the sky. Three superflare stars c
Externí odkaz:
http://arxiv.org/abs/2101.02901
Autor:
Xu, Y., Liu, C., Tian, H., Newberg, H. J., Laporte, C. F. P., Zhang, B., Wang, H. F., Li, J., Deng, L. C.
The recent discovery of a spiral feature in $Z-V_Z$ phase plane in the solar neighborhood implies that the Galactic disk has been remarkably affected by a dwarf galaxy passing through it some hundreds of millions of years ago. Using 429,500 LAMOST K
Externí odkaz:
http://arxiv.org/abs/2010.14096
Publikováno v:
A&A 642, A95 (2020)
Recent statistical deconvolution methods have produced extended kinematical maps in a range of heliocentric distances that are a factor of two to three larger than those analysed in the Gaia Collaboration based on the same data. In this paper, we use
Externí odkaz:
http://arxiv.org/abs/2007.14825
Autor:
Li, X. -Y., Huang, Y., Chen, B. -Q., Wang, H. -F., Sun, W. -X., Guo, H. -L., Li, Q. -Z., Liu, X. -W.
Using a sample of nearly 140,000 red clump stars selected from the LAMOST and Gaia Galactic surveys, we have mapped mean vertical velocity $\overline{V_{z}}$ in the $X$-$Y$ plane for a large volume of the Galactic disk (6 $< R < 16$ kpc; $-20 <\phi<
Externí odkaz:
http://arxiv.org/abs/2007.06947