Zobrazeno 1 - 10
of 719
pro vyhledávání: '"Yuan Haibo"'
We report the discovery of a close binary J0606+2132 (Gaia DR3 3423365496448406272) with $P_{\rm obs}=2.77$ days containing a possible massive white dwarf or a neutron star using the LAMOST spectroscopic data. By a joint fitting of the radial velocit
Externí odkaz:
http://arxiv.org/abs/2411.08837
Autor:
Huang, Bowen, Yuan, Haibo, Xu, Shuai, Xiao, Kai, Xiang, Maosheng, Huang, Yang, Beers, Timothy C.
We apply the stellar locus method to synthetic $(BP-RP)_{XPSP}$ and $(BP-G)_{XPSP}$ colors derived from corrected Gaia BP/RP (XP) spectra to obtain accurate and precise estimates of metallicity for about 100 million stars in the Milky Way (34 million
Externí odkaz:
http://arxiv.org/abs/2410.19895
We present systematic identifications of supergiants of M31/M33 based on massive LAMOST spectroscopic survey. Radial velocities of nearly 5000 photometrically selected M31/M33 supergiant candidates have been properly derived from the qualified spectr
Externí odkaz:
http://arxiv.org/abs/2410.19447
Autor:
Li, Chun, Fan, Zhou, Zhao, Gang, Wang, Wei, Zheng, Jie, Tan, Kefeng, Zhao, Jingkun, Huang, Yang, Yuan, Haibo, Xiao, Kai, Chen, Yuqin, Li, Haining, Liu, Yujuan, Song, Nan, Esamdin, Ali, Niu, Hu-Biao, Liu, Jin-Zhong, Feng, Guo-Jie
The Stellar Abundances and Galactic Evolution Survey (SAGES) is a multi-band survey that covers the northern sky area of ~12000 deg2. Nanshan One-meter Wide-field Telescope (NOWT) of Xinjiang Astronomical Observatory (XAO) carried out observations on
Externí odkaz:
http://arxiv.org/abs/2410.10218
Autor:
Huang, Yang, Feng, Qikang, Khachaturyants, Tigran, Zhang, Huawei, Liu, Jifeng, Shen, Juntai, Beers, Timothy C., Lu, Youjun, Wang, Song, Yuan, Haibo
In this reply, we present a comprehensive analysis addressing the concerns raised by Dehnen et al. (2024) regarding our recent measurement of the disk warp precession using the `motion-picture' method (Huang et al. 2024). We carefully examine the imp
Externí odkaz:
http://arxiv.org/abs/2409.02734
Gaia DR3 photometry and BP/RP spectra have been widely used as reference in photometric calibrations. In this work, we check the spatial uniformity of Gaia DR3 photometry and BP/RP spectra by comparing the BP, RP and G bands photometry with the synth
Externí odkaz:
http://arxiv.org/abs/2408.09779
Autor:
Huang, Yang, Beers, Timothy C., Xiao, Kai, Yuan, Haibo, Lee, Young Sun, Gu, Hongrui, Hong, Jihye, Liu, Jifeng, Fan, Zhou, Coelho, Paula, Cruz, Patricia, Galindo-Guil, F. J., Daflon, Simone, Jiménez-Esteban, Fran, Cenarro, Javier, Cristóbal-Hornillos, David, Hernández-Monteagudo, Carlos, López-Sanjuan, Carlos, Marín-Franch, Antonio, Moles, Mariano, Varela, Jesús, Ramírez, Héctor Vázquez, Alcaniz, Jailson, Dupke, Renato, Ederoclite, Alessandro, Sodré Jr., Laerte, Angulo, Raul E.
We present a catalog of stellar parameters (effective temperature $T_{\rm eff}$, surface gravity $\log g$, age, and metallicity [Fe/H]) and elemental-abundance ratios ([C/Fe], [Mg/Fe], and [$\alpha$/Fe]) for some five million stars (4.5 million dwarf
Externí odkaz:
http://arxiv.org/abs/2408.02171
Autor:
Zhang, Ruoyi, Yuan, Haibo, Huang, Bowen, Wang, Tao, Yang, Lin, Green, Gregory M., Zhang, Xiangyu
We present a direct measurement of extinction curves using corrected $Gaia$ XP spectra of the common sources in $Gaia$ DR3 and LAMOST DR7. Our analysis of approximately 370 thousand high-quality samples yielded a high-precision average extinction cur
Externí odkaz:
http://arxiv.org/abs/2407.12386
Autor:
Huang, Yang, Feng, Qikang, Khachaturyants, Tigran, Zhang, Huawei, Liu, Jifeng, Shen, Juntai, Beers, Timothy C., Lu, Youjun, Wang, Song, Yuan, Haibo
The shape of the dark matter (DM) halo is key to understanding the hierarchical formation of the Galaxy. Despite extensive efforts in recent decades, however, its shape remains a matter of debate, with suggestions ranging from strongly oblate to prol
Externí odkaz:
http://arxiv.org/abs/2407.00319
Autor:
Xiao, Kai, Huang, Bowen, Huang, Yang, Yuan, Haibo, Beers, Timothy C., Liu, Jifeng, Xiang, Maosheng, Lu, Xue, Xu, Shuai, Yang, Lin, Zheng, Chuanjie, Li, Zhirui, Zhang, Bowen, Shi, Ruifeng
We search for an optimal filter design for the estimation of stellar metallicity, based on synthetic photometry from Gaia XP spectra convolved with a series of filter-transmission curves defined by different central wavelengths and bandwidths. Unlike
Externí odkaz:
http://arxiv.org/abs/2405.20212