Browsing by Author "6123c001-f66e-4309-8f92-b2fd742c8983"

Now showing items 1-20 of 27

    • A megacam survey of outer halo satellites. I. description of the survey 
      Muñoz Vidal, Ricardo Rodrigo; Cote, Patrick; Santana, Felipe; Geha, Marla; Simón, Joshua D.; Oyarzún, Grecco A.; Stetson, Peter B.; Djorgovski, S. G. (IOP Publishing, 2018-06-10)
      We describe a deep, systematic imaging study of satellites in the outer halo of the Milky Way. Our sample consists of 58 stellar overdensities-i.e., substructures classified as either globular clusters, classical dwarf ...
    • A megacam survey of outer halo satellites. III. Photometric and structural parameters 
      Muñoz Vidal, Ricardo Rodrigo; Cote, Patrick; Santana, Felipe; Geha, Marla; Simón, Joshua D.; Oyarzún, Grecco A.; Stetson, Peter B.; Djorgovski, S. G. (The American Astronomical Society, 2018-06-10)
      We present structural parameters from a wide-field homogeneous imaging survey of Milky Way satellites carried out with the MegaCam imagers on the 3.6 m Canada-France-Hawaii Telescope and 6.5 m Magellan-Clay telescope. Our ...
    • A Megacam Survey of Outer Halo Satellites. VI. The Spatially resolved Starformation History of the Carina ... 
      Santana Rojas, Felipe; Muñoz Vidal, Ricardo Rodrigo; de Boer, T. J. L.; Simon, Joshua D.; Geha, Marla; Coté, Patrick; Guzmán Fernández, Andrés; Stetson, Peter B.; Djorgovski, S. George (IOP, 2016)
      We present the spatially resolved star-formation history (SFH) of the Carina dwarf spheroidal galaxy, obtained from deep, wide-field g and r imaging and a metallicity distribution from the literature. Our photometry covers ...
    • A MegaCam Survey of Outer Halo Satellites. VII. A Single Sérsic Index versus Effective Radius Relation for ... 
      Marchi-Lasch, Sebastián; Muñoz Vidal, Ricardo Rodrigo; Santana, Felipe A.; Carballo Bello, Julio A.; Chanamé, Julio; Geha, Marla; Simon, Joshua D.; Stetson, Peter B.; Djorgovski, S. G. (Institute of Physics Publishing, 2019)
      In this work, we use structural properties of the Milky Way's outer halo (R G > 25 kpc) satellites (dwarf spheroidal galaxies, ultra-faint dwarf (UFD) galaxies and globular clusters (GCs)) derived from deep, wide-field, ...
    • A survey for dwarf galaxy remnants around 14 globular clusters in the outer halo 
      Sollima, A.; Martínez Delgado, David; Muñoz Vidal, Ricardo Rodrigo; Carballo-Bello, J. A.; Valls-Gabaud, D.; Grebel, E. K.; Santana, F.; Cote, P.; Djorgovski, S. G. (Oxford University Press, 2018-06)
      We report the results of a systematic photometric survey of the peripheral regions of a sample of 14 globular clusters in the outer halo of the Milky Way at distances d(GC) > 25 kpc from the Galactic Centre. The survey is ...
    • Cusps in the center of galaxies: a real conflict with observations or a numerical artefact of cosmological ... 
      Baushev, Anton; Valle Bertoni, Luciano del; Campusano Brown, Luis; Escala Astorquiza, Andrés; Muñoz Vidal, Ricardo Rodrigo; Palma Quilodrán, Gonzalo (IOP Publishing, 2017-05)
      Galaxy observations and N-body cosmological simulations produce conflicting dark matter halo density pro files for galaxy central regions. While simulations suggest a cuspy and universal density pro file (UDP) of this ...
    • Deep Subaru Hyper Suprime-Cam Observations of Milky Way Satellites Columba I and Triangulum II 
      Carlin, Jeffrey L; Sand, David J.; Muñoz Vidal, Ricardo Rodrigo; Spekkens, Kristine; Willman, Beth; Crnojevic, Denija; Forbes, Duncan A.; Hargis, ,Jonathan; Kirby, Evan; Peter, Annika H. G.; Romanowsky, Aaron J.; Strader, Jay (IOP Publishing, 2017)
      We present deep, wide-field Subaru Hyper Suprime-Cam photometry of two recently discovered satellites of the Milky Way (MW): Columba. I (Col I) and Triangulum. II (Tri II). The color-magnitude diagrams of both objects point ...
    • Exploring the Very Extended Low-surface-brightness Stellar Populations of the Large Magellanic Cloud with SMASH 
      Nidever, David L.; Olsen, Knut; Choi, Yumi; Boer, Thomas J. L. De; Blum, Robert D.; Bell, Eric F.; Zaritsky, Dennis; Martín, Nicolás F.; Saha, Abhijit; Conn, Blair C.; Besla, Gurtina; Marel, Roeland P. Van Der; Noël, Noelia E. D.; Monachesi, Antonela; Stringfellow, Guy S.; Massana, Pol; Cioni, María Rosa L.; Gallart, Carme; Monelli, Matteo; Martínez Delgado, David; Muñoz Vidal, Ricardo Rodrigo; Majewski, Steven R.; Vivas, A. Katherina; Walker, Alistair R.; Kaleida, Catherine; Chu, You-Hua (Institute of Physics Publishing, 2019)
      We present the detection of very extended stellar populations around the Large Magellanic Cloud (LMC) out to R ∼ 21°, or ∼18.5 kpc at the LMC distance of 50 kpc, as detected in the Survey of the Magellanic Stellar History ...
    • Hydra II: a faint and compact milky way dwarf galaxy found in the survey ofthe magellanic stellar history 
      Martín, Nicolás F.; Nidever, David L.; Besla, Gurtina; Olsen, Knut; Walker, Alistair R.; Vivas, A. Katherina; Gruendl, Robert A.; Kaleida, Catherine C.; Muñoz Vidal, Ricardo Rodrigo; Blum, Robert D.; Saha, Abhijit; Conn, Blair; Bell, Eric; Chu, You-Hua; Cioni, María-Rosa; Boer, Thomas de; Gallart, Carme; Jin, Shoko; Kunder, Andrea; Majewski, Steven; Martínez Delgado, David; Monachesi, Antonela; Monelli, Matteo; Monteagudo, Lara; Noël, Noelia; Olszewski, Edward; Stringfellow, Guy; Van der Marel, Roeland; Zaritsky, Dennis (The American Astronomical Society, 2015)
      We present the discovery of a new dwarf galaxy, Hydra II, found serendipitously within the data from the ongoing Survey of the Magellanic Stellar History conducted with the Dark Energy Camera on the Blanco 4 m Telescope. ...
    • MEASURING SIZES OF ULTRA-FAINT DWARF GALAXIES 
      Muñoz Vidal, Ricardo Rodrigo; Padmanabhan, Nikhil; Geha, Marla (IOP PUBLISHING LTD, 2012-02-01)
      The discovery of ultra-faint dwarf (UFD) galaxies in the halo of the Milky Way extends the faint end of the galaxy luminosity function to a few hundred solar luminosities. This extremely low luminosity regime poses a ...
    • Metallicity and alpha-element abundance gradients along the Sagittarius Stream as seen by APOGEE 
      Hayes, Christian; Majewski, Steven; Hasselquist, Sten; Anguiano, Borja; Shetrone, Matthew; Law, David; Schiavon, Ricardo; Cunha, Katia; Smith, Verne; Beaton, Rachael; Price Whelan, Adrián; Allende Prieto, Carlos; Battaglia, Giuseppina; Bizyaev, Dimitry; Brownstein, Joel; Cohen, Roger; Frinchaboy, Peter; García Hernández, D. A.; Lacerna, Iván; Lane, Richard; Meszaros, Szabolcs; Moni Bidin, Christian; Muñoz Vidal, Ricardo; Nidever, David; Oravetz, Audrey; Oravetz, Daniel; Pan, Kaike; Román Lopes, Alexandre; Sobeck, Jennifer; Stringfellow, Guy (IOP, 2020)
      Using 3D positions and kinematics of stars relative to the Sagittarius (Sgr) orbital plane and angular momentum, we identify 166 Sgr stream members observed by the Apache Point Observatory Galactic Evolution Experiment ...
    • Multiple chemodynamic stellar populations of the Ursa Minor dwarf spheroidal galaxy 
      Pace, Andrew B.; Kaplinghat, Manoj; Kirby, Evan; Simon, Joshua D.; Tollerud, Erik; Muñoz Vidal, Ricardo Rodrigo; Côte, Patrick; Djorgovski, S. G.; Geha, Marla (Oxford University Press, 2020)
      We present a Bayesian method to identify multiple (chemodynamic) stellar populations in dwarf spheroidal galaxies (dSphs) using velocity, metallicity, and positional stellar data without the assumption of spherical symmetry. ...
    • Searching for optical counterparts to ultra-compact high velocity clouds:Possible detection of a counterpart ... 
      Janesh, William; Rhode, Katherine L.; Salzer, John J.; Janowiecki, Steven; Adams, Elizabeth A. K.; Haynes, Martha P.; Giovanelli, Riccardo; Cannon, John M.; Muñoz Vidal, Ricardo Rodrigo (IOS Press, 2015)
      We report initial results from a campaign to obtain optical imaging of Ultra Compact High Velocity Clouds (UCHVCs) discovered by the Arecibo Legacy Fast ALFA (ALFALFA) HI survey. UCHVCs have properties consistent with their ...
    • Serendipitous discovery of RR lyrae stars in the leo v ultra-faint galaxy 
      Medina, Gustavo E.; Muñoz Vidal, Ricardo Rodrigo; Vivas, A. Katherina; Förster, Francisco; Carlin, Jeffrey L.; Martínez, Jorge; Galbany, Lluis; González Gaitán, Santiago; Hamuy Wackenhut, Mario; Jaeger, Thomas De; Maureira, Juan Carlos; San Martín, Jaime (Institute of Physics, 2017)
      During the analysis of RR Lyrae stars (RRLs) discovered in the High Cadence Transient Survey (HiTS) taken with the Dark Energy Camera at the 4 m telescope at Cerro Tololo Inter-American Observatory, we found a group of ...
    • Sloan digital sky survey IV: mapping the milky way, nearby galaxies, and the distant universe 
      Blanton, Michael R.; Bershady, Matthew A.; Abolfathi, Bela; Muñoz Vidal, Ricardo Rodrigo; Santana, Felipe (IOP Publishing Ltd., 2017)
      We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands ...
    • SMASH 1: A very faint globular cluster disrupting in the outer reaches of the LMC? 
      Martín, Nicolás F.; Jungbluth, Valentín; Nidever, David L.; Bell, Eric F.; Besla, Gurtina; Blum, Robert D.; Cioni, María Rosa L.; Conn, Blair C.; Kaleida, Catherine C.; Gallart, Carme; Jin, Shoko; Majewski, Steven R.; Martínez Delgado, David; Monachesi, Antonela; Muñoz Vidal, Ricardo Rodrigo; Noel, Noelia E. D.; Olsen, Knut; Stringfellow, Guy S.; Van der Marel, Roeland P.; Vivas, A. Katherina; Walker, Alistair R.; Zaritsky, Dennis (IOP Publishing, 2016)
      We present the discovery of a very faint stellar system, SMASH 1, that is potentially a satellite of the Large Magellanic Cloud. Found within the Survey of the MAgellanic Stellar History (SMASH), SMASH 1 is a compact (r(h) ...
    • SMASH: survey of the MAgellanic Stellar history 
      Nidever, David L.; Olsen, Knut; Muñoz Vidal, Ricardo Rodrigo; Santana, Felipe; Medina, Gustavo E. (IOP Publishing Ltd., 2017)
      The Large and Small Magellanic Clouds are unique local laboratories for studying the formation and evolution of small galaxies in exquisite detail. The Survey of the MAgellanic Stellar History (SMASH) is an NOAO community ...
    • Tails and streams around the Galactic globular clusters NGC 1851, NGC 1904, NGC 2298 and NGC 2808 
      Carballo Bello, Julio A.; Martínez Delgado, David; Navarrete, Camila; Catelan, Marcio; Muñoz Vidal, Ricardo Rodrigo; Antoja, Teresa; Sollima, Antonio (Oxford University Press, 2018)
      We present Dark Energy Camera imaging for the peculiar Galactic globular clustersNGC 1851, NGC1904 (M 79), NGC2298 and NGC2808. Our deep photometry reveals that all the clusters have an important contribution of stars ...
    • Target Selection for the SDSS-IV APOGEE-2 Survey 
      Zasowski, G.; Cohen, R. E.; Chojnowski, S. D.; Santana, F.; Muñoz Vidal, Ricardo Rodrigo (IOP Publishing Ltd., 2017)
      APOGEE-2 is a high-resolution, near-infrared spectroscopic survey observing similar to 3. x. 10(5) stars across the entire sky. It is the successor to APOGEE and is part of the Sloan Digital Sky Survey IV (SDSS-IV). APOGEE-2 ...
    • The electromagnetic counterpart of the binary neutron star merger LIGO/Virgo GW170817. I. discovery of the ... 
      Soares Santos, M.; Holz, Holz, D. E.; Annis, J.; Medina, G. E.; Muñoz Vidal, Ricardo Rodrigo (IOP Publishing Ltd., 2017)
      We present the Dark Energy Camera (DECam) discovery of the optical counterpart of the first binary neutron star merger detected through gravitational-wave emission, GW170817. Our observations commenced 10.5 hr post-merger, ...