Hunting ghosts: The iconic stellar stream(s) around NGC 5907 under scrutiny
Astronomy and Astrophysics, ISSN: 1432-0746, Vol: 632
2019
- 11Citations
- 9Captures
- 1Mentions
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
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.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85090229187&origin=inward; http://dx.doi.org/10.1051/0004-6361/201937077; https://www.aanda.org/10.1051/0004-6361/201937077; https://www.aanda.org/10.1051/0004-6361/201937077/pdf; https://dx.doi.org/10.1051/0004-6361/201937077; https://www.aanda.org/articles/aa/full_html/2019/12/aa37077-19/aa37077-19.html
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