32 citations · 35 across the 7 of their papers we have counts for
7 papers
Project Hephaistos -- IV. James Webb Space Telescope Observations of Two Dyson Sphere Candidates
Erik Zackrisson, Arjan Bik, Anita Ali Asgar +11
We report on JWST/MIRI imaging and spectroscopy of two M-dwarf stars previously singled out by project Hephaistos as potential Dyson-sphere candidates (their candidates D and E) du…
Archival Diagnostics for Potential Background Contaminantsof Project Hephaistos Dyson Sphere Candidates
Tongtian Ren, Michael A. Garrett, Erik Zackrisson +4
We report on the diagnostic investigation of nine Project Hephaistos Dyson Sphere candidate M-dwarfs based on archival data. By comparing the Gaia DR3 positions with epoch 2016.0,…
High-resolution imaging of the radio source associated with Project Hephaistos Dyson Sphere Candidate G
Tongtian Ren, Michael A. Garrett, Andrew P. V. Siemion
We present high-resolution e-MERLIN and EVN (e-VLBI) observations of a radio source associated with Dyson Sphere candidate G, identified as part of Project Hephaistos. The radio so…
Background Contamination of the Project Hephaistos Dyson Spheres Candidates
Tongtian Ren, Michael A. Garrett, Andrew P. V. Siemion
Project Hephaistos recently identified seven M-dwarfs as possible Dyson Spheres (DS) candidates. We have cross-matched three of these candidates (A, B \& G) with radio sources dete…
Resolved Near-infrared Stellar Photometry from the Magellan Telescope for 13 Nearby Galaxies: JAGB Method Distances
Abigail J. Lee, Andrew J. Monson, Wendy L. Freedman +6
We present near-infrared JHK photometry for the resolved stellar populations in 13 nearby galaxies: NGC 6822, IC 1613, NGC 3109, Sextans B, Sextans A, NGC 300, NGC 55, NGC 7793, NG…
The C/M Ratio of AGB Stars in the Local Group Galaxies
Tongtian Ren, Biwei Jiang, Yi Ren +1
The number ratio of carbon-rich to oxygen-rich asymptotic giant branch (AGB) stars (the so-called C/M ratio) is closely related to the evolution environment of the host galaxy. Thi…
The Sample of Red Supergiants in Twelve Low-Mass Galaxies of the Local Group
Yi Ren, Biwei Jiang, Ming Yang +2
This work establishes the most complete sample of red supergiants (RSGs) in twelve low-mass galaxies (WLM, IC 10, NGC 147, NGC 185, IC 1613, Leo A, Sextans B, Sextans A, NGC 6822,…