Stars in the Sagittarius stream J/MNRAS/501/2279 ivo://CDS.VizieR/J/MNRAS/501/2279 doi:10.26093/cds/vizier.75012279 CDS Vasiliev E. Belokurov V. Erkal D. 2026-06-11T20:07:14Z 2023-11-15T08:00:46Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr milky-way-galaxy giant-stars visible-astronomy trigonometric-parallax proper-motions stellar-distance radial-velocity metallicity photometry spectroscopy infrared-astronomy We assemble a catalogue of candidate Sagittarius stream members with 5D and 6D phase-space information, using astrometric data from Gaia DR2, distances estimated from RR Lyrae stars, and line-of-sight velocities from various spectroscopic surveys. We find a clear misalignment between the stream track and the direction of the reflex-corrected proper motions in the leading arm of the stream, which we interpret as a signature of a time-dependent perturbation of the gravitational potential. A likely cause of this perturbation is the recent passage of the most massive Milky Way satellite - the Large Magellanic Cloud (LMC). We develop novel methods for simulating the Sagittarius stream in the presence of the LMC, using specially tailored N-body simulations and a flexible parametrization of the Milky Way halo density profile. We find that while models without the LMC can fit most stream features rather well, they fail to reproduce the misalignment and overestimate the distance to the leading arm apocentre. On the other hand, models with an LMC mass in the range (1.3+/-0.3)x10^11^M_{sun}_ rectify these deficiencies. We demonstrate that the stream can not be modelled adequately in a static Milky Way. Instead, our Galaxy is required to lurch toward the massive in-falling Cloud, giving the Sgr stream its peculiar shape and kinematics. By exploring the parameter space of Milky Way potentials, we determine the enclosed mass within 100kpc to be (5.6+/-0.4)x10^11^M_{sun}_, and the virial mass to be (9.0+/-1.3)x10^11^M_{sun}_, and find tentative evidence for a radially-varying shape and orientation of the Galactic halo. 2021MNRAS.501.2279V https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/501/2279 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to I/345 : Gaia DR2 (Gaia Collaboration, 2018) VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/501/2279 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/501/2279 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/501/2279 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/501/2279 https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/501/2279 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/501/2279 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/MNRAS/501/2279/catalog (Catalogue of stars in the Sagittarius stream) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/501/2279/catalog? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/501/2279/catalog? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/501/2279/catalog? 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46816-46817 46819 46836-46837 46839 46848 46851 46857 46859 46864-46866 46870-46873 46875-46876 46879 46881 46883-46885 46887 46892-46894 46896-46897 46899 46915 46934-46935 46944-46945 46947-46948 46950-46951 46960-46961 46963 46976-46977 46979 47000 47002-47003 47069-47071 47093-47095 47444 47447 47452-47453 47455 47461-47462 47464 47467 47469-47471 47473-47475 47509 47515 47518-47519 47536 47539-47540 47542-47545 47547 47553-47558 47711 47738 47799 47805 47821-47823 47825-47827 47843 47877-47879 47882-47883 47996-47998 48076-48078 48080-48082 48085-48088 48090-48091 48104 48106 48109 48114 48128-48129 48131 48137-48139 48144-48145 48147 48204-48206 48220 48222-48223 48332-48334 48337-48339 48349-48351 48353-48355 48364 48366-48367 48372-48374 48377 48381 48388-48390 48412 48414-48415 48424-48426 48432 48434-48437 48439-48440 48443-48444 48446 48457 48459 48468-48470 48473-48474 48476-48477 48480 48482-48483 48492-48494 48496 48501-48503 48517-48518 48520-48521 48524-48526 48528 48530-48533 48535-48536 48538-48539 48544 48561 48578 48596 48599 48656-48658 48660 48662-48665 48668-48669 48680 48684 48693 48705-48706 48710 48713 48715 48717 48721 48768 48770 1.1166583743361574e-19 3.916500758235022e-19 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/501/2279?format=ascii Optical Infrared default J/MNRAS/501/2279/catalog Catalogue of stars in the Sagittarius stream recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int RAJ2000 Right ascension (J2000) deg pos.eq.ra;meta.main indexed DEJ2000 Declination (J2000) deg pos.eq.dec;meta.main indexed plx Gaia DR2 parallax mas pos.parallax.trig float e_plx Error on plx mas stat.error;pos.parallax float pmRA Proper motion in right ascension mas/yr pos.pm;pos.eq.ra float e_pmRA Error on pmRA mas/yr stat.error;pos.pm;pos.eq.ra float pmDE Proper motion in declination mas/yr pos.pm;pos.eq.dec float e_pmDE Error on pmDE mas/yr stat.error;pos.pm;pos.eq.dec float Gmag Gaia DR2 G-band magnitude mag phot.mag;em.opt float BPmag Gaia DR2 BP-band magnitude mag phot.mag;em.opt.B float Jmag 2MASS J-band magnitude mag phot.mag;em.IR.J float Hmag 2MASS H-band magnitude mag phot.mag;em.IR.H float Kmag 2MASS K-band magnitude mag phot.mag;em.IR.K float E(B-V) Reddening from Schlegel, Finkbeiner & Davis (1998ApJ...500..525S) mag phot.color.excess float Dist Estimate of the distance from nearby RR Lyrae stars kpc pos.distance float e_Dist Error on Dist kpc stat.error float vLOS ? Heliocentric line-of-sight velocity km/s phys.veloc;pos.heliocentric float nullable e_vLOS ? Error on vLOS km/s stat.error float nullable [Fe/H] ? Fe/H abundance ratio phys.abund.Fe;arith.ratio float nullable e_[Fe/H] ? Error on [Fe/H] stat.error;phys.abund.Fe float nullable Ref ? Reference for the spectroscopic data (1) meta.ref;pos.frame int nullable Lambda {Lambda} coordinate in the Sgr stream frame (2) deg pos.frame double Beta {Beta} coordinate in the Sgr stream frame (2) deg pos.frame float SimbadName Simbad column added by the CDS meta.id char nullable