M104 (NGC 4594), commonly known as the Sombrero Galaxy, is a lenticular galaxy located in the constellation Virgo at an approximate distance of 31 million light-years. It is distinguished by its bright, prominent central bulge and a sharply defined equatorial dust lane that encircles the galaxy, giving it its characteristic “sombrero” appearance. The galaxy hosts a massive central black hole and exhibits properties of both spiral and elliptical systems, placing it in an intermediate morphological class.
The structure of M104 is dominated by its luminous stellar halo and dense central bulge, which is surrounded by a thin, edge-on disk of dust and gas. The dark dust lane sharply silhouettes against the bright core, revealing fine-scale structure within the disk. While the galaxy appears relatively smooth compared to grand-design spirals, subtle variations in brightness and embedded star-forming regions can be detected, particularly with the addition of narrowband data.
This image was created using broadband LRGB data combined with narrowband H-alpha acquired from Arnold, CA. The data were collected between March 7 and March 17, 2024, with a total integration time of 9.12 hours . The H-alpha data were incorporated to enhance localized regions of ionized hydrogen within the disk, while the broadband data preserve the natural color and prominent structural features of the galaxy, including its extended halo and distinctive dust lane.