36 citations · 218 across the 16 of their papers we have counts for
13 papers · 1 filter
Exploring Be phenomena in OBA stars: a Mid-infrared search
Mingjie Jian, Noriyuki Matsunaga, Biwei Jiang +2
As early-type stars with a rotation speed close to their critical velocity, Be stars experience an event called the Be phenomenon. The material in their equator is ejected into out…
Astrophysical calibration of the oscillator strengths of YJ-band absorption lines in classical Cepheids
S. S. Elgueta, N. Matsunaga, M. Jian +13
Newly-developed spectrographs with increased resolving powers, particularly those covering the near-IR range, allow the characterization of more and more absorption lines in stella…
A Very Metal-poor RR Lyrae Star with a Disk Orbit Found in the Solar Neighborhood
Noriyuki Matsunaga, Akinori Itane, Kohei Hattori +28
Metal-deficient stars are important tracers for understanding the early formation of the Galaxy. Recent large-scale surveys with both photometric and spectroscopic data have report…
Line-depth ratios as indicators of effective temperature and surface gravity
Noriyuki Matsunaga, Mingjie Jian, Daisuke Taniguchi +1
The analysis of stellar spectra depends upon the effective temperature (Teff) and the surface gravity (log g). However, the estimation of log g with high accuracy is challenging. A…
Effective temperatures of red supergiants estimated from line-depth ratios of iron lines in the YJ bands, 0.97--1.32 micron
Daisuke Taniguchi, Noriyuki Matsunaga, Mingjie Jian +10
Determining the effective temperatures (Teff) of red supergiants (RSGs) observationally is important in many fields of stellar physics and galactic astronomy, yet some significant…
Red Supergiants in M31 and M33 I. The Complete Sample
Yi Ren, Biwei Jiang, Ming Yang +3
The aim of this paper is to establish a complete sample of red supergiants (RSGs) in M31 and M33. The member stars of the two galaxies are selected from the near-infrared (NIR) poi…
The effect of surface gravity on line-depth ratios in the wavelength range 0.97-1.32 μm
Mingjie Jian, Daisuke Taniguchi, Noriyuki Matsunaga +10
A line-depth ratio (LDR) of two spectral lines with different excitation potentials is expected to be correlated with the effective temperature (). It is possible t…
Intrinsic Color Indices of Early-Type Dwarf Stars
Dingshan Deng, Yang Sun, Mingjie Jian +2
Early-type stars are short lived and scarce in comparison with other types. Based on the recently released catalogs of early type stars from the largest LAMOST spectroscopic survey…
Identification of Absorption Lines of Heavy Metals in the Wavelength Range 0.97--1.32 Micron
Noriyuki Matsunaga, Daisuke Taniguchi, Mingjie Jian +13
Stellar absorption lines of heavy elements can give us various insights into the chemical evolution of the Galaxy and nearby galaxies. Recently developed spectrographs for the near…
The metallicity effect on line-depth ratios in APOGEE -band spectra
Mingjie Jian, Noriyuki Matsunaga, Kei Fukue
Ratios of carefully selected line depths are sensitive to stellar effective temperature (). Relations established between line-depth ratio (LDR) and $T_\mathrm{eff}…
The Ultraviolet Extinction in the Bands
Mingxu Sun, B. W. Jiang, He Zhao +4
Interstellar extinction in ultraviolet is the most severe in comparison with optical and infrared wavebands and a precise determination plays an important role in correctly recover…
On the chemical abundances of Miras in clusters: V1 in the metal-rich globular NGC 5927
V. D'Orazi, D. Magurno, G. Bono +50
We present the first spectroscopic abundance determination of iron, alpha-elements (Si, Ca and Ti) and sodium for the Mira variable V1 in the metal-rich globular cluster NGC 5927.…
Revision of Stellar Intrinsic Colors in the Infrared by the Spectroscopic Surveys
Mingjie Jian, Shuang Gao, He Zhao +1
Intrinsic colors of normal stars are derived in the popularly used infrared bands involving the 2MASS/JHKs, WISE, Spitzer/IRAC and AKARI/S9W filters. Based on three spectroscopic s…