cc-byMario Soto VicencioKunderA PrudilZ CoveyKR HughesJ JoyceM SimionIT KussR CamposC JohnsonCI PilachowskiCA LarsonKA Koch-HansenAJ MarchettiT RichMR ButlerE ClarksonWI RivetM DevineK VivasAK PerrenGI SotoM Silva2025-06-052025-06-0520240004-6256https://hdl.handle.net/20.500.12740/22682The Milky Way Bulge extra-tidal star survey is a spectroscopic survey with the goal of identifying stripped globular cluster stars from inner Galaxy clusters. In this way, an indication of the fraction of metal-poor bulge stars that originated from globular clusters can be determined. We observed and analyzed stars in and around BH 261, an understudied globular cluster in the bulge. From seven giants within the tidal radius of the cluster, we measured an average heliocentric radial velocity of RV = -61 +/- 2.6 km s-1 with a radial velocity dispersion of sigma = 6.1 +/- 1.9 km s-1. The large velocity dispersion may have arisen from tidal heating in the cluster's orbit about the Galactic center, or because BH 261 has a high dynamical mass as well as a high mass-to-light ratio. From spectra of five giants, we measure an average metallicity of [Fe/H] = -1.1 +/- 0.2 dex. We also spectroscopically confirm an RR Lyrae star in BH 261, which yields a distance to the cluster of 7.1 +/- 0.4 kpc. Stars with 3D velocities and metallicities consistent with BH 261 reaching to similar to 0.degrees 5 from the cluster are identified. A handful of these stars are also consistent with the spatial distribution of potential debris from models focusing on the most recent disruption of the cluster. C1 [Kunder, Andrea; Kuss, Rebekah; Campos, Carlos; Butler, Evan; Rivet, Michael] St Martins Univ, 5000 Abbey Way SE, Lacey, WA 98503 USA. [Prudil, Zdenek; Marchetti, Tommaso] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany. [Covey, Kevin R.; Larson, Kristen A.; Silva, Erika] Western Washington Univ, Dept Phys & Astron, MS-9164,516 High St, Bellingham, WA 98225 USA. [Hughes, Joanne] Seattle Univ, Phys Dept, 901 12th Ave, Seattle, WA 98122 USA. [Joyce, Meridith] HUN REN Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary. [Joyce, Meridith] MTA Ctr Excellence, CSFK, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary. [Simion, Iulia T.] Shanghai Normal Univ, Shanghai Key Lab Astrophys, 100 Guilin Rd, Shanghai 200234, Peoples R China. [Kuss, Rebekah] Oregon State Univ, Dept Math, 1500 SW Jefferson Way, Corvallis, OR 97331 USA. [Johnson, Christian I.] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA. [Pilachowski, Catherine A.] Indiana Univ, Dept Astron, SW319,727 E 3rd St, Bloomington, IN 47405 USA. [Koch-Hansen, Andreas J.] Heidelberg Univ, Astron Rechen Inst, Zentrum Astron, Monchhofstr 12-14, D-69120 Heidelberg, Germany. [Rich, Michael R.] UCLA, Dept Phys & Astron, 430 Portola Plaza,Box 951547, Los Angeles, CA 90095 USA. [Butler, Evan] Univ Washington, Dept Astron, Phys Astron Bldg,Room C319,Box 351580, Seattle, WA 98195 USA. [Clarkson, William I.] Univ Michigan Dearborn, Dept Nat Sci, 4901 Evergreen Rd, Dearborn, MI 48128 USA. [Devine, Kathryn] Coll Idaho, 2112 Cleveland Blvd, Caldwell, ID 83605 USA. [Vivas, A. Katherina] NSFs NOIRLab, Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile. [Perren, Gabriel I.] CONICET UNLP, Inst Astrofis La Plata IALP, RA-1900 La Plata, Argentina. [Soto, Mario] Univ Atacama, Inst Astron & Ciencias Planetarias, Copayapu 485, Copiapo, Chile. C3 European Southern Observatory; Western Washington University; Seattle University; HUN-REN; HUN-REN Research Centre for Astronomy & Earth Sciences; Konkoly Thege Miklos Astronomical Institute; HUN-REN; HUN-REN Research Centre for Astronomy & Earth Sciences; Shanghai Normal University; Oregon State University; Space Telescope Science Institute; Indiana University System; Indiana University Bloomington; Ruprecht Karls University Heidelberg; University of California System; University of California Los Angeles; University of Washington; University of Washington Seattle; University of Michigan System; University of Michigan Dearborn; College of Idaho; National Optical Astronomy Observatory; Cerro Tololo Inter-American Observatory; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Universidad de Atacamainfo:eu-repo/semantics/openAccessAstronomy & AstrophysicsArticulo de revista10.3847/1538-3881/ad0cfc