Search Publications
Precision of the Chinese Space Station Telescope (CSST) stellar radial velocities
Yuan, Hai-Bo; Sun, Yang; Deng, Ding-Shan
The Chinese Space Station Telescope (CSST) spectroscopic survey plans to deliver high-quality low-resolution (R > 200) slitless spectra for hundreds of millions of targets down to a limiting magnitude of about 21 mag, covering a large survey area (17 500 deg2) and a wide wavelength range (255-1000 nm by three bands GU, GV, and GI). I…
FUV and NIR size of the HI selected low surface brightness galaxies
Cheng, Cheng; Li, Zi-Jian; Huang, Jia-Sheng +10 more
How low surface brightness galaxies (LSBGs) form stars and assemble stellar mass is one of the most important questions related to understanding the LSBG population. We select a sample of 381 HI bright LSBGs with both far ultraviolet (FUV) and near infrared (NIR) observations to investigate the star formation rate (SFR) and stellar mass scales, an…
Searching for the brightest stars in galaxies outside the Local Group
Tikhonov, Nikolay; Galazutdinova, Olga; Sholukhova, Olga +3 more
This paper introduces a technique for searching for bright massive stars in galaxies beyond the Local Group. To search for massive stars, we processed the results of stellar photometry from the Hubble Space Telescope (HST) images using the DAOPHOT and DOLPHOT packages. The results of such searches are demonstrated with examples of the galaxies DDO…
Measurement of Hubble constant: were differences in secondary distance indicators apparent as early as the HST Key Project?
Gupta, Shashikant; Thakur, Rahul Kumar; Nigam, Rahul +1 more
Different measurements of the Hubble constant (H0) are not consistent, and a tension between the CMB based methods and cosmic distance ladder based methods has been observed. Measurements from various distance based methods are also inconsistent. To aggravate the problem, the same cosmological probe (Type Ia SNe for instance) calibrated…
Spectral energy distribution similarity of the local galaxies and the 3.6 µm selected galaxies from the Spitzer Extended Deep Survey
Cheng, Cheng; Li, Zi-Jian; Huang, Jia-Sheng +11 more
The Spitzer Extended Deep Survey (SEDS) as a deep and wide mid-infrared (MIR) survey project provides a sample of 500 000+ sources spreading 1.46 square degree and a depth of 26 AB mag (3σ). Combining with the previous available data, we build a PSF-matched multi-wavelength photometry catalog from u band to 8 µm. We fit the SEDS galaxies spe…