Note: the data is available upon email request; we are working on finding the proper configuration and platform to share it online.
Researchers have long used dust emission to map dust in 2D, and in recent years starlight reddening has been used to map dust in 3D. However, the technique of combining 3D information from reddening with emission data is still in incipient stage. In this work, I combined these two datasets to create the first large scale 3D galatic dust temperature map. You can see a video of the result below: 3D visualizations of the 27′ map of the temperature of galactic dust and its density. The intensity is proportional to the density, and the RGB variation is temperature dependent. Blue is sensitive to the shortest wavelength (hotter dust, ~20K), red to longer wavelengths (cold dust), and green to intermediate values. The perspective shown here features a screenshot the camera placement doing a 25-pc loop around the Sun, looking in the galactic plane towards the anti-center (180 galactic longitude), towards the Orion, Taurus, Perseus, and California clouds.
The paper can be read here: https://arxiv.org/abs/2211.07667
Having knowledge about the temperature of galactic dust can be useful for many applications, including galactic magnetic field models, polarization, star formation, cosmic microwave background foregrounds.
We also show that the technique has enough precision to separate the temperature for two clouds along the line of sight, in the Cepheus cloud system. Future iterations can hopefully allow us to go to better resolutions, and more constraining power, as the datasets improve.