HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Hunting ghosts: the iconic stellar stream(s) around NGC 5907 under scrutiny

Abstract : Stellar streams are regarded as crucial objects for testing galaxy formation models because their morphology traces the underlying potentials and their occurrence tracks the assembly history of the galaxies. The existence of one of the most iconic stellar streams, the double loop around NGC 5907, has recently been questioned by new observations with the Dragonfly telescope. This new work only finds parts of the stream, even though a 1σ surface brightness limit of 30.3 mag arcsec −2 in the g band was reached. Using 7.2 h of luminance L-band imaging with the Milanković 1.4-m telescope, we have reobserved the putative double-loop part to confirm or reject this assessment. We do not find signs of the double loop, but see only a single knee-shaped stellar stream. Comparing our results to the data by the Dragonfly team, we find the same features. Our observations reach a 1σ surface brightness limit of 29.7 mag arcsec −2 in the g band. These findings emphasize the need for independent confirmation of detections of very low-surface brightness features.
Document type :
Journal articles
Complete list of metadata

Contributor : Olivier Hauss Connect in order to contact the contributor
Submitted on : Thursday, February 18, 2021 - 7:48:06 AM
Last modification on : Wednesday, November 3, 2021 - 9:23:56 AM
Long-term archiving on: : Wednesday, May 19, 2021 - 6:18:28 PM


Publisher files allowed on an open archive




Oliver Müller, Ana Vudragović, Michal Bílek. Hunting ghosts: the iconic stellar stream(s) around NGC 5907 under scrutiny. Astronomy and Astrophysics - A&A, EDP Sciences, 2019, 632, pp.L13. ⟨10.1051/0004-6361/201937077⟩. ⟨hal-03144212⟩



Record views


Files downloads