| Download | - View final version: ALMA imaging of the M-dwarf Fomalhaut C’s debris disc (PDF, 4.3 MiB)
|
|---|
| DOI | Resolve DOI: https://doi.org/10.1093/mnras/stab1237 |
|---|
| Author | Search for: Cronin-Coltsmann, Patrick F.ORCID identifier: https://orcid.org/0000-0002-5538-721X; Search for: Kennedy, Grant M.ORCID identifier: https://orcid.org/0000-0001-6831-7547; Search for: Kalas, Paul; Search for: Milli, JulienORCID identifier: https://orcid.org/0000-0001-9325-2511; Search for: Clarke, Cathie J.; Search for: Duchêne, GaspardORCID identifier: https://orcid.org/0000-0002-5092-6464; Search for: Greaves, JaneORCID identifier: https://orcid.org/0000-0002-3133-413X; Search for: Lawler, Samantha M.; Search for: Lestrade, Jean-François; Search for: Matthews, Brenda C.1; Search for: Shannon, Andrew; Search for: Wyatt, Mark C.ORCID identifier: https://orcid.org/0000-0001-9064-5598 |
|---|
| Affiliation | - National Research Council of Canada. Herzberg Astronomy and Astrophysics
|
|---|
| Funder | Search for: University of Warwick; Search for: Royal Society; Search for: NSF; Search for: NASA; Search for: Horizon 2020; Search for: STFC; Search for: ESO; Search for: NINS; Search for: National Research Council of Canada; Search for: MOST; Search for: KASI |
|---|
| Format | Text, Article |
|---|
| Subject | binaries: general; circumstellar matter; stars: individual: LP 876-10; stars: individual: Fomalhaut; submillimetre: planetary systems |
|---|
| Abstract | Fomalhaut C (LP 876-10) is a low mass M4V star in the intriguing Fomalhaut triple system and, like Fomalhaut A, possesses a debris disc. It is one of very few nearby M-dwarfs known to host a debris disc and of these has by far the lowest stellar mass. We present new resolved observations of the debris disc around Fomalhaut C with the Atacama Large Millimetre Array that allow us to model its properties and investigate the system’s unique history. The ring has a radius of 26 au and a narrow full width at half-maximum of at most 4.2 au. We find a 3σ upper limit on the eccentricity of 0.14, neither confirming nor ruling out previous dynamic interactions with Fomalhaut A that could have affected Fomalhaut C’s disc. We detect no ¹²CO J = 3-2 emission in the system and do not detect the disc in scattered light with HST/STIS or VLT/SPHERE. We find the original Herschel detection to be consistent with our ALMA model’s radial size. We place the disc in the context of the wider debris disc population and find that its radius is as expected from previous disc radius-host luminosity trends. Higher signal-to-noise observations of the system would be required to further constrain the disc properties and provide further insight to the history of the Fomalhaut triple system as a whole. |
|---|
| Publication date | 2021-04-30 |
|---|
| Publisher | Oxford |
|---|
| Licence | |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 09f5db03-3eda-47a8-b6b3-86660002bcf7 |
|---|
| Record created | 2022-09-06 |
|---|
| Record modified | 2023-03-16 |
|---|
