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Measuring the Mass of the Large Magellanic Cloud with Stellar Streams Observed by

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cam.issuedOnline2021-12-17
dc.contributor.authorShipp, N
dc.contributor.authorErkal, D
dc.contributor.authorDrlica-Wagner, A
dc.contributor.authorLi, TS
dc.contributor.authorPace, AB
dc.contributor.authorKoposov, SE
dc.contributor.authorCullinane, LR
dc.contributor.authorDa Costa, GS
dc.contributor.authorJi, AP
dc.contributor.authorKuehn, K
dc.contributor.authorLewis, GF
dc.contributor.authorMackey, D
dc.contributor.authorSimpson, JD
dc.contributor.authorWan, Z
dc.contributor.authorZucker, DB
dc.contributor.authorBland-Hawthorn, J
dc.contributor.authorFerguson, PS
dc.contributor.authorLilleengen, S
dc.contributor.orcidShipp, Nora [0000-0003-2497-091X]
dc.contributor.orcidDrlica-Wagner, Alex [0000-0001-8251-933X]
dc.contributor.orcidLi, Ting S [0000-0002-9110-6163]
dc.contributor.orcidPace, Andrew B [0000-0002-6021-8760]
dc.contributor.orcidKoposov, Sergey E [0000-0003-2644-135X]
dc.contributor.orcidCullinane, Lara R [0000-0001-8536-0547]
dc.contributor.orcidDa Costa, Gary S [0000-0001-7019-649X]
dc.contributor.orcidJi, Alexander P [0000-0002-4863-8842]
dc.contributor.orcidKuehn, Kyler [0000-0003-0120-0808]
dc.contributor.orcidLewis, Geraint F [0000-0003-3081-9319]
dc.contributor.orcidMackey, Dougal [0000-0002-6529-8093]
dc.contributor.orcidSimpson, Jeffrey D [0000-0002-8165-2507]
dc.contributor.orcidWan, Zhen [0000-0002-3105-3821]
dc.contributor.orcidZucker, Daniel B [0000-0003-1124-8477]
dc.contributor.orcidBland-Hawthorn, Joss [0000-0001-7516-4016]
dc.contributor.orcidFerguson, Peter S [0000-0001-6957-1627]
dc.date.accessioned2022-01-05T11:51:43Z
dc.date.available2022-01-05T11:51:43Z
dc.date.issued2021-12-01
dc.date.submitted2021-07-27
dc.date.updated2022-01-05T11:51:42Z
dc.description.abstract<jats:title>Abstract</jats:title> <jats:p>Stellar streams are excellent probes of the underlying gravitational potential in which they evolve. In this work, we fit dynamical models to five streams in the Southern Galactic hemisphere, combining observations from the Southern Stellar Stream Spectroscopic Survey (<jats:italic>S</jats:italic> <jats:sup>5</jats:sup>), Gaia EDR3, and the Dark Energy Survey, to measure the mass of the Large Magellanic Cloud (LMC). With an ensemble of streams, we find a mass of the LMC ranging from ∼14–19 × 10<jats:sup>10</jats:sup> <jats:italic>M</jats:italic> <jats:sub>⊙</jats:sub>, probed over a range of closest approach times and distances. With the most constraining stream (Orphan–Chenab), we measure an LMC mass of <jats:inline-formula> <jats:tex-math> <?CDATA ${18.8}_{-4.0}^{+3.5}\times {10}^{10}\,{M}_{\odot }$?> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mn>18.8</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>4.0</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>3.5</mml:mn> </mml:mrow> </mml:msubsup> <mml:mo>×</mml:mo> <mml:msup> <mml:mrow> <mml:mn>10</mml:mn> </mml:mrow> <mml:mrow> <mml:mn>10</mml:mn> </mml:mrow> </mml:msup> <mml:mspace width="0.25em" /> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>⊙</mml:mo> </mml:mrow> </mml:msub> </mml:math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="apjac2e93ieqn1.gif" xlink:type="simple" /> </jats:inline-formula>, probed at a closest approach time of 310 Myr and a closest approach distance of 25.4 kpc. This mass is compatible with previous measurements, showing that a consistent picture is emerging of the LMC’s influence on structures in the Milky Way. Using this sample of streams, we find that the LMC’s effect depends on the relative orientation of the stream and LMC at their point of closest approach. To better understand this, we present a simple model based on the impulse approximation and we show that the LMC’s effect depends both on the magnitude of the velocity kick imparted to the stream and the direction of this kick.</jats:p>
dc.identifier.doi10.17863/CAM.79471
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.otherapjac2e93
dc.identifier.otherac2e93
dc.identifier.otheraas33723
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/332023
dc.languageen
dc.language.isoeng
dc.publisherAmerican Astronomical Society
dc.publisher.urlhttp://dx.doi.org/10.3847/1538-4357/ac2e93
dc.subject5109 Space Sciences
dc.subject51 Physical Sciences
dc.titleMeasuring the Mass of the Large Magellanic Cloud with Stellar Streams Observed by
dc.typeArticle
dcterms.dateAccepted2021-10-08
prism.issueIdentifier2
prism.publicationNameAstrophysical Journal
prism.volume923
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.versionVoR
rioxxterms.versionofrecord10.3847/1538-4357/ac2e93

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