Star Stream Survey Images By Ken Crawford
The search for minor galaxy merger remnants with an international team of astronomers and astrophysicists, lead by Dr. David Martínez-Delgado of the Max-Planck Institute for astronomy. A small team of amateurs take very deep images to reveal these stellar tidal streams. These are the debris of smaller dwarf galaxies left during the process of being absorbed by larger galaxies. The amateur team is lead by R. Jay GaBany who oversees the pilot survey.
The Tidal Stream Survey illustration is by Jon Lomberg.
These are my personal contributions to the star stream survey.
See more Deep Sky Images
The Tidal Stream Survey illustration is by Jon Lomberg.
These are my personal contributions to the star stream survey.
See more Deep Sky Images
NGC1055 by Ken Crawford
This galaxy shows a coherent mixed "spiked" type streams in this almost edge on view. They represent the debris of one accreted satellite that occurred longer than 10 Gigayears ago that have had time to fully mix along its orbit.
The Astronomical Journal paper documenting these and other findings of the survey.
You can also view this image at NASA Astronomy Picture Of The Day.
This galaxy shows a coherent mixed "spiked" type streams in this almost edge on view. They represent the debris of one accreted satellite that occurred longer than 10 Gigayears ago that have had time to fully mix along its orbit.
The Astronomical Journal paper documenting these and other findings of the survey.
You can also view this image at NASA Astronomy Picture Of The Day.
NGC7531 by Ken Crawford
This galaxy shows a large, diffuse cloud like structure in the main galaxies halo was first reported by Buta (1987) in photographic plates. This deeper images shows a possible shell component of an umbrella like structure.
The Astronomical Journal paper documenting these and other findings of the survey.
This galaxy shows a large, diffuse cloud like structure in the main galaxies halo was first reported by Buta (1987) in photographic plates. This deeper images shows a possible shell component of an umbrella like structure.
The Astronomical Journal paper documenting these and other findings of the survey.
NGC4216 by Ken Crawford
What makes this galaxy interesting is the star stream is a huge arc that still possibly harbors the dwarf galaxy. This was my first major star stream image that has not been revealed before this image.
The Astronomical Journal paper documenting these and other findings of the survey.
You can also view this image at NASA Astronomy Picture Of The Day.
What makes this galaxy interesting is the star stream is a huge arc that still possibly harbors the dwarf galaxy. This was my first major star stream image that has not been revealed before this image.
The Astronomical Journal paper documenting these and other findings of the survey.
You can also view this image at NASA Astronomy Picture Of The Day.
NGC5908 by Ken Crawford
NGC5908 is a distant galaxy that we see almost edge on. This image and follow-up observations show NGC5908 has structures that are very similar to the mixed streams of NGC1055.
NGC5908 is a distant galaxy that we see almost edge on. This image and follow-up observations show NGC5908 has structures that are very similar to the mixed streams of NGC1055.
NGC1097 by Ken Crawford
The jet like features were first detected in 1977 and were thought from the active core area. We now believe these to be possible merger streams as there is no detection of HI or X-ray observations.
The jet like features were first detected in 1977 and were thought from the active core area. We now believe these to be possible merger streams as there is no detection of HI or X-ray observations.
NGC7711 by Ken Crawford
This galaxy I like to call the Hula Hoop galaxy. The features described in this Paper are thought to be a least two orbits of a dwarf galaxy. It is around 55 Mpc distant and if you zoom into the image you can see a thin dust lane around the core.
This galaxy I like to call the Hula Hoop galaxy. The features described in this Paper are thought to be a least two orbits of a dwarf galaxy. It is around 55 Mpc distant and if you zoom into the image you can see a thin dust lane around the core.
NGC6239 by Ken Crawford
This distorted galaxy shows strong evidence of recent mergers and the features are described in this paper. You can see spike and loop type structures in this deep image.
This distorted galaxy shows strong evidence of recent mergers and the features are described in this paper. You can see spike and loop type structures in this deep image.
NGC4684 by Ken Crawford
This galaxy show a very faint loop type structure that took many hours of exposures to reveal. Currently, I cannot find any other images that show this structure this well.
This galaxy show a very faint loop type structure that took many hours of exposures to reveal. Currently, I cannot find any other images that show this structure this well.
NGC7600 by Ken Crawford
This shell galaxy image has resulted in a professional letter that has been recently accepted by the Astronomical Journal Letters. This is because of the similarity of these structures to the cold mark matter N-body simulation created by Carlos Frenk and his team.
The article in The Universe Today
You can also view this image at NASA Astronomy Picture Of The Day.
This shell galaxy image has resulted in a professional letter that has been recently accepted by the Astronomical Journal Letters. This is because of the similarity of these structures to the cold mark matter N-body simulation created by Carlos Frenk and his team.
The article in The Universe Today
You can also view this image at NASA Astronomy Picture Of The Day.