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Spatial distribution of 29 sample clusters over...

Spatial distribution of 29 sample clusters overlaid on the M31 stellar substructure map ...

Hongrui Gu et al, The Astronomical Journal 171 4

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Distribution of 29 globular clusters: projected...

Distribution of 29 globular clusters: projected distance versus metallicity. Red error b...

Hongrui Gu et al, The Astronomical Journal 171 4

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Comparison of metallicities derived from differ...

Comparison of metallicities derived from different models. The x-axis shows results from...

Hongrui Gu et al, The Astronomical Journal 171 4

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Joint spectral and photometric fitting for star...

Joint spectral and photometric fitting for star cluster G002 using BC03 models. Top pane...

Hongrui Gu et al, The Astronomical Journal 171 4

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Comparison of our final metallicity determinati...

Comparison of our final metallicity determinations (x-axis) with literature values (y-ax...

Hongrui Gu et al, The Astronomical Journal 171 4

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Same as Figure 7 but comparing our derived ages...

Same as Figure 7 but comparing our derived ages with literature values.

Hongrui Gu et al, The Astronomical Journal 171 4

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Same as Figure 9 but for age versus projected g...

Same as Figure 9 but for age versus projected galactocentric distance.

Hongrui Gu et al, The Astronomical Journal 171 4

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Same as Figure 5 but for the derived ages.

Hongrui Gu et al, The Astronomical Journal 171 4

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Cutout images of star cluster G002 in 12 filter...

Cutout images of star cluster G002 in 12 filters: GALEX (NUV, FUV), SAGES (uSC,vSAGES), ...

Hongrui Gu et al, The Astronomical Journal 171 4

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QE curve of the Andor iKon-L 936 BEX2-DD CCD mo...

QE curve of the Andor iKon-L 936 BEX2-DD CCD mounted on the BFOSC instrument (red solid ...

Hongrui Gu et al, The Astronomical Journal 171 4

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The spatial distribution of our M31 halo star c...

The spatial distribution of our M31 halo star cluster sample (black dots). The dashed el...

Hongrui Gu et al, The Astronomical Journal 171 4

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Impact of MIRI photometry on QG selection. Top ...

Impact of MIRI photometry on QG selection. Top left: migration of galaxies in the sSFR–M...

Tiancheng Yang et al, The Astrophysical Journal Letters 1000 2

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The mass-dependent number density evolution of ...

The mass-dependent number density evolution of QGs. Error bars represent the combined ef...

Tiancheng Yang et al, The Astrophysical Journal Letters 1000 2

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The UVJ color–color diagram for the photometric...

The UVJ color–color diagram for the photometric sample with M⋆ > 109.0 M⊙. The comoving ...

Tiancheng Yang et al, The Astrophysical Journal Letters 1000 2

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The redshift evolution of the QG fraction in di...

The redshift evolution of the QG fraction in different stellar mass bins. Predictions fr...

Tiancheng Yang et al, The Astrophysical Journal Letters 1000 2

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Left panel: the SMF of QGs at 2 < z < 8, fitted...

Left panel: the SMF of QGs at 2 < z < 8, fitted with a single Schechter function. Galaxi...

Tiancheng Yang et al, The Astrophysical Journal Letters 1000 2

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(Top left) The 2.1 μm (black) and 3–10 keV NuST...

(Top left) The 2.1 μm (black) and 3–10 keV NuSTAR (green) light curves of Sgr A* show a ...

F. Yusef-Zadeh et al, The Astrophysical Journal Letters 1000 2

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(Left) Superimposed on the NIR light curve at 2...

(Left) Superimposed on the NIR light curve at 2.1 μm are the light curves of Sgr A* at 1...

F. Yusef-Zadeh et al, The Astrophysical Journal Letters 1000 2

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(Left) Calculated time delay between pairs of r...

(Left) Calculated time delay between pairs of radio bands, plotted as a function of the ...

F. Yusef-Zadeh et al, The Astrophysical Journal Letters 1000 2

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(Top left) Correlation of X-ray flare emission ...

(Top left) Correlation of X-ray flare emission detected by NuSTAR with NIR flare emissio...

F. Yusef-Zadeh et al, The Astrophysical Journal Letters 1000 2

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(Top left) Light curve of Sgr A* at 2.1 μm take...

(Top left) Light curve of Sgr A* at 2.1 μm taken on 2024 April 5. (Top right) Same as to...

F. Yusef-Zadeh et al, The Astrophysical Journal Letters 1000 2

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(Top) The blue curve shows the synchrotron flux...

(Top) The blue curve shows the synchrotron flux density of a homogeneous thermal disk, f...

F. Yusef-Zadeh et al, The Astrophysical Journal Letters 1000 2

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(Top) The normal stellar field at 2.1 μm of NIR...

(Top) The normal stellar field at 2.1 μm of NIRCam of JWST surrounding Sgr A* (left), an...

F. Yusef-Zadeh et al, The Astrophysical Journal Letters 1000 2

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Predicted X-ray flare luminosities arising from...

Predicted X-ray flare luminosities arising from Compton upscattering of disk and flare s...

F. Yusef-Zadeh et al, The Astrophysical Journal Letters 1000 2

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A schematic diagram of how X-ray flare emission...

A schematic diagram of how X-ray flare emission from Sgr A* is generated by ICS of NIR p...

F. Yusef-Zadeh et al, The Astrophysical Journal Letters 1000 2

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