Report
View in EDS

Anatomy of a Fall: Stationary and super-Keplerian spiral arms generated by accretion streamers in protostellar discs

Bibliographic Details
Title: Anatomy of a Fall: Stationary and super-Keplerian spiral arms generated by accretion streamers in protostellar discs
Authors: Calcino, Josh, Price, Daniel J., Hilder, Thomas, Christiaens, Valentin, Speedie, Jessica, Ormel, Chris W.
Publication Year: 2024
Collection: Astrophysics
Subject Terms: Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics
More Details: Late-stage infall onto evolved protoplanetary discs is an important source of material and angular momentum replenishment, and disc substructures. In this paper we used 3D smoothed particle hydrodynamics simulations to model streamer-disc interactions for a prograde streamer. The initially parabolic streamer interacts with the disc material to excite disc eccentricity, which can last on the order of $10^5$ years. We found that the spiral arms the streamer excited in the disc can have a variety of pattern speeds, ranging from stationary to super-Keplerian. Spiral arms with various pattern speeds can exist simultaneously, providing a way to diagnose them in observations. Streamer induced spirals appear similar to those generated by a massive outer companion, where the pitch angle of the spiral increases towards the source of the perturbation. Additionally, the spirals arms can show large and sudden pitch angle changes. Streamer induced spirals are long-lived, lasting approximately $3-4\times$ longer than the initial streamer infall timescale ($\sim$$10^4$ years). After the initial interaction with the disc, a long lasting low $m$ azimuthal mode persists in the disc.
Comment: 12 pages, 11 figures, acception version
Document Type: Working Paper
Access URL: http://arxiv.org/abs/2410.18521
Accession Number: edsarx.2410.18521
Database: arXiv
FullText Text:
  Availability: 0
CustomLinks:
  – Url: http://arxiv.org/abs/2410.18521
    Name: EDS - Arxiv
    Category: fullText
    Text: View this record from Arxiv
    MouseOverText: View this record from Arxiv
  – Url: https://resolver.ebsco.com/c/xy5jbn/result?sid=EBSCO:edsarx&genre=article&issn=&ISBN=&volume=&issue=&date=20241024&spage=&pages=&title=Anatomy of a Fall: Stationary and super-Keplerian spiral arms generated by accretion streamers in protostellar discs&atitle=Anatomy%20of%20a%20Fall%3A%20Stationary%20and%20super-Keplerian%20spiral%20arms%20generated%20by%20accretion%20streamers%20in%20protostellar%20discs&aulast=Calcino%2C%20Josh&id=DOI:
    Name: Full Text Finder (for New FTF UI) (s8985755)
    Category: fullText
    Text: Find It @ SCU Libraries
    MouseOverText: Find It @ SCU Libraries
Header DbId: edsarx
DbLabel: arXiv
An: edsarx.2410.18521
RelevancyScore: 1112
AccessLevel: 3
PubType: Report
PubTypeId: report
PreciseRelevancyScore: 1112.27160644531
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Anatomy of a Fall: Stationary and super-Keplerian spiral arms generated by accretion streamers in protostellar discs
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Calcino%2C+Josh%22">Calcino, Josh</searchLink><br /><searchLink fieldCode="AR" term="%22Price%2C+Daniel+J%2E%22">Price, Daniel J.</searchLink><br /><searchLink fieldCode="AR" term="%22Hilder%2C+Thomas%22">Hilder, Thomas</searchLink><br /><searchLink fieldCode="AR" term="%22Christiaens%2C+Valentin%22">Christiaens, Valentin</searchLink><br /><searchLink fieldCode="AR" term="%22Speedie%2C+Jessica%22">Speedie, Jessica</searchLink><br /><searchLink fieldCode="AR" term="%22Ormel%2C+Chris+W%2E%22">Ormel, Chris W.</searchLink>
– Name: DatePubCY
  Label: Publication Year
  Group: Date
  Data: 2024
– Name: Subset
  Label: Collection
  Group: HoldingsInfo
  Data: Astrophysics
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Astrophysics+-+Earth+and+Planetary+Astrophysics%22">Astrophysics - Earth and Planetary Astrophysics</searchLink><br /><searchLink fieldCode="DE" term="%22Astrophysics+-+Astrophysics+of+Galaxies%22">Astrophysics - Astrophysics of Galaxies</searchLink><br /><searchLink fieldCode="DE" term="%22Astrophysics+-+Solar+and+Stellar+Astrophysics%22">Astrophysics - Solar and Stellar Astrophysics</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: Late-stage infall onto evolved protoplanetary discs is an important source of material and angular momentum replenishment, and disc substructures. In this paper we used 3D smoothed particle hydrodynamics simulations to model streamer-disc interactions for a prograde streamer. The initially parabolic streamer interacts with the disc material to excite disc eccentricity, which can last on the order of $10^5$ years. We found that the spiral arms the streamer excited in the disc can have a variety of pattern speeds, ranging from stationary to super-Keplerian. Spiral arms with various pattern speeds can exist simultaneously, providing a way to diagnose them in observations. Streamer induced spirals appear similar to those generated by a massive outer companion, where the pitch angle of the spiral increases towards the source of the perturbation. Additionally, the spirals arms can show large and sudden pitch angle changes. Streamer induced spirals are long-lived, lasting approximately $3-4\times$ longer than the initial streamer infall timescale ($\sim$$10^4$ years). After the initial interaction with the disc, a long lasting low $m$ azimuthal mode persists in the disc.<br />Comment: 12 pages, 11 figures, acception version
– Name: TypeDocument
  Label: Document Type
  Group: TypDoc
  Data: Working Paper
– Name: URL
  Label: Access URL
  Group: URL
  Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/2410.18521" linkWindow="_blank">http://arxiv.org/abs/2410.18521</link>
– Name: AN
  Label: Accession Number
  Group: ID
  Data: edsarx.2410.18521
PLink https://login.libproxy.scu.edu/login?url=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsarx&AN=edsarx.2410.18521
RecordInfo BibRecord:
  BibEntity:
    Subjects:
      – SubjectFull: Astrophysics - Earth and Planetary Astrophysics
        Type: general
      – SubjectFull: Astrophysics - Astrophysics of Galaxies
        Type: general
      – SubjectFull: Astrophysics - Solar and Stellar Astrophysics
        Type: general
    Titles:
      – TitleFull: Anatomy of a Fall: Stationary and super-Keplerian spiral arms generated by accretion streamers in protostellar discs
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Calcino, Josh
      – PersonEntity:
          Name:
            NameFull: Price, Daniel J.
      – PersonEntity:
          Name:
            NameFull: Hilder, Thomas
      – PersonEntity:
          Name:
            NameFull: Christiaens, Valentin
      – PersonEntity:
          Name:
            NameFull: Speedie, Jessica
      – PersonEntity:
          Name:
            NameFull: Ormel, Chris W.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 24
              M: 10
              Type: published
              Y: 2024
ResultId 1