Browsing by Author "Minniti, D."

Now showing items 1-20 of 49

    • Analysis of physical processes in eruptive YSOs with near infrared spectra and multi-wavelength light curves 

      Guo, Zhen; Lucas, P. W.; Contreras Pena, Carlos; Smith, L. C.; Morris, C.; Kurtev, R. G.; Borissova, J.; Alonso-García, J.; Minniti, D.; Chené, A. -N.; Kumar, M. S. N.; Garatti, A. Caratti o; Froebrich, D. (2021-03-26)
      The decade-long Vista Variables in the Via Lactea (VVV) survey has detected numerous highly variable young stellar objects (YSOs). We present a study of 61 highly variable VVV YSOs (Delta Ks = 1-5 mag), combining near ...

    • Assessing the stellar population and the environment of an HII region on the far side of the Galaxy 

      Chené, A. -N.; Benjamin, R. A.; Alegría, S. Ramírez; Borissova, J.; Kurtev, R.; Bidin, C. Moni; Mauro, F.; Lucas, P.; Guo, Z.; Smith, L. C.; Gonzalez-Fernandez, C.; Ivanov, V. D.; Minniti, D.; Anderson, L. D.; Armentrout, W. P.; Gonzalez, D.; Herrero, A.; Ramírez, K. Peña (2021-04-20)
      We have investigated the stellar and interstellar content of the distant star formation region IRAS 17591-2228 (WISE HII region GAL 007.47+0.06). It is associated to a water maser, whose parallax distance is d=20.4^{+2.8} ...

    • A colour-excess extinction map of the southern Galactic disc from the VVV and GLIMPSE surveys 

      Soto, M.; Barbá, R.; Minniti, D.; Kunder, A.; Majaess, D.; Nilo-Castellón, J. L.; Alonso-García, J.; Leone, G.; Morelli, L.; Haikala, L.; Firpo, V.; Lucas, P.; Emerson, J. P.; Bidin, C. Moni; Geisler, D.; Saito, R. K.; Gurovich, S.; Ramos, R. Contreras; Rejkuba, M.; Barbieri, M.; Roman-Lopes, A.; Hempel, M.; Alonso, M. V.; Baravalle, L. D.; Borissova, J.; Kurtev, R.; Milla, F. (2019-09-01)
      An improved high-resolution and deep A Ks foreground dust extinction map is presented for the Galactic disc area within 295◦ ≾ l ≾ 350◦, −1.0◦ ≾ b ≾ +1.0◦. At some longitudes the map reaches up to |b| ~ 2.25◦, for a total ...

    • A detailed analysis of the HD 73526 2:1 resonant planetary system 

      Wittenmyer, Robert A.; Tan, Xianyu; Lee, Man Hoi; Horner, Jonathan; Tinney, C.G.; Butler, R. P.; Salter, G. S.; Carter, B. D.; Jones, H.R.A.; O'Toole, S. J.; Bailey, J.; Wright, D.; Crane, J. D.; Schectman, S. A.; Arriagada, P.; Thompson, I.; Minniti, D.; Diaz, M. (2014-01-10)
      We present six years of new radial velocity data from the Anglo-Australian and Magellan Telescopes on the HD 73526 2:1 resonant planetary system. We investigate both Keplerian and dynamical ( interacting) fits to these ...

    • Discovery of a brown dwarf companion to the A3V star β Circini 

      Smith, Leigh; Lucas, P.W.; Peña, C. Contreras; Kurtev, R.; Marocco, Federico; Jones, H.R.A.; Beamin, J.C.; Napiwotzki, Ralf; Borissova, J.; Burningham, B.; Faherty, J.; Pinfield, D.J.; Gromadzki, M.; Ivanov, V.D.; Minniti, D.; Stimson, W.; Villanueva, V. (2015-12-21)
      We report the discovery of an L dwarf companion to the A3V star β Circini. VVV J151721.49−585131.5, or β Cir B, was identified in a proper motion and parallax catalogue of the VISTA Variables in the Vía Láctea survey as ...

    • Discovery of a mid-infrared protostellar outburst of exceptional amplitude 

      Lucas, P. W.; Elias, Jay; Points, Sean; Guo, Z.; Stecklum, B.; Vorobyov, E.; Morris, C.; Borissova, J.; Kurtev, R.; Pena, C. Contreras; Medina, N.; Minniti, D.; Ivanov, V. D.; Saito, R. K. (2020-09-23)
      We report the discovery of a mid-infrared outburst in a Young Stellar Object (YSO) with an amplitude close to 8 mag at lambda ~ 4.6 microns. WISEA J142238.82-611553.7 is one of 23 highly variable WISE sources discovered ...

    • Discovery of new globular clusters in the Sagittarius dwarf galaxy 

      Minniti, D.; Ripepi, V.; Fernández-Trincado, J. G.; Alonso-García, J.; Smith, L. C.; Lucas, P. W.; Gómez, M.; Pullen, J. B.; Garro, E. R.; Cádiz, F. Vivanco; Hempel, M.; Rejkuba, M.; Saito, R. K.; Palma, T.; Clariá, J. J.; Gregg, M.; Majaess, D. (2021-03-12)
      Context. Globular clusters (GCs) are witnesses of the past accretion events onto the Milky Way. In particular, the GCs of the Sagittarius (Sgr) dwarf galaxy are important probes of an on-going merger. Aims. Our main goal ...

    • The edge of the milky way stellar disk revealed using clump giant stars as distance indicators 

      Minniti, D.; Saito, R.K.; Alonso-Garcia, J.; Lucas, P.W.; Hempel, M. (2011)
      We use the clump giants of the disk as standard candles calibrated from Hipparcos parallaxes in order to map their distribution with two new near-infrared surveys of the Galactic plane: UKIDSS-GPS and VISTA Variables in ...

    • Evidence of distant spiral arms in the Galactic disk quadrant IV from VVV red clump giants 

      Kammers, R.; Saito, R. K.; Botan, E.; Minniti, D.; Alonso-García, J.; Smith, L. C.; Lucas, P. W. (2022-09-09)
      The discovery of new clear windows in the Galactic plane using the VVV near-IR extinction maps allows the study of the structure of the Milky Way (MW) disk. The ultimate goal of this work is to map the spiral arms in the ...

    • Extreme infrared variables from UKIDSS - II. an end-of-survey catalogue of eruptive YSOs and unusual stars 

      Lucas, P. W.; Smith, L. C.; Pena, C. Contreras; Froebrich, Dirk D.; Drew, Janet E.; Kumar, M. S. N.; Borissova, J.; Minniti, D.; Kurtev, R.; Monguio, M. (2017-12-11)
      We present a catalogue of 618 high-amplitude infrared variable stars (1 < ΔK < 5 mag) detected by the two widely separated epochs of 2.2 μm data in the UKIDSS Galactic plane survey, from searches covering ∼1470 deg2. Most ...

    • GJ 832c : A super-earth in the habitable zone 

      Wittenmyer, Robert A.; Tuomi, Mikko; Butler, R. P.; Jones, Hugh; Anglada-Escudé, Guillem; Horner, Jonathan; Tinney, C. G.; Marshall, J. P.; Carter, B. D.; Bailey, J.; Salter, G. S.; O'Toole, S. J.; Wright, D.; Crane, J. D.; Schectman, S. A.; Arriagada, P.; Thompson, I.; Minniti, D.; Jenkins, J. S.; Diaz, M. (2014-08-05)
      We report the detection of GJ 832c, a super-Earth orbiting near the inner edge of the habitable zone of GJ 832, an M dwarf previously known to host a Jupiter analog in a nearly circular 9.4 yr orbit. The combination of ...

    • Hundreds of new cluster candidates in the VISTA Variables in the Vía Láctea survey DR1 

      Barba, R.H.; Roman-Lopes, A.; Nilo Castellon, J.L.; Firpo, V.; Minniti, D.; Lucas, P.W.; Emerson, J.P.; Hempel, M.; Soto, M.; Saito, R.K. (2015-09-18)
      Context. VISTA variables in the Vía Láctea is an ESO Public survey dedicated to scanning the bulge and an adjacent portion of the Galactic disk in the fourth quadrant using the VISTA telescope and its near-infrared camera ...

    • Infrared spectroscopy of eruptive variable protostars from VVV 

      Peña, C. Contreras; Lucas, P. W.; Kurtev, R.; Minniti, D.; Garatti, A. Caratti o; Marocco, F.; Thompson, M. A.; Froebrich, D.; Kumar, N.; Stimson, W.; Molina, C. Navarro; Borissova, J.; Gledhill, T.; Terzi, R. (2017-03-01)
      In a companion work (Paper I) we detected a large population of highly variable Young Stellar Objects (YSOs) in the Vista Variables in the Via Lactea (VVV) survey, typically with class I or flat spectrum spectral energy ...

    • Large amplitude periodic outbursts and long period variables in the VVV VIRAC2-$β$ database 

      Guo, Zhen; Lucas, P. W.; Smith, L. C.; Clarke, C.; Peña, C. Contreras; Bayo, A.; Briceño, C.; Elias, J.; Kurtev, R. G.; Borissova, J.; Alonso-García, J.; Minniti, D.; Catelan, M.; Nikzat, F.; Morris, C.; Miller, N. (2022-03-21)
      The VISTA Variables in the Via Lactea (VVV) survey obtained near-infrared photometry toward the Galactic bulge and the southern disc plane for a decade (2010 - 2019). We designed a modified Lomb-Scargle method to search ...

    • Long-term Stellar Variability in the Galactic Centre Region 

      Molina, C. Navarro; Borissova, J.; Catelan, M.; Lucas, P. W.; Medina, N.; Pena, C. Contreras; Kurtev, R.; Minniti, D. (2019-02)
      We report the detection of variable stars within a 11.5' x 11.5' region near the Galactic centre (GC) that includes the Arches and Quintuplet clusters, as revealed by the VISTA Variables in the Via Lactea (VVV) survey. ...

    • Low-Mass X-ray Binaries and Globular Clusters in Centaurus A 

      Jordan, A.; Sivakoff, G.R.; McLaughlin, D.E.; Blakeslee, J.P.; Evans, D.A.; Kraft, R.P.; Hardcastle, M.J.; Peng, E.W.; Cote, P.; Croston, J.H.; Juett, A.M.; Minniti, D.; Raychaudhury, S.; Sarazin, C.L.; Worrall, S.M.; Harris, W.E.; Woodley, K.A.; Birkinshaw, M.; Brassington, Nicola; Forman, W.R.; Jones, C.; Murray, S.S. (2007)
      We present results of Hubble Space Telescope and Chandra X-Ray Observatory observations of globular clusters (GCs) and low-mass X-ray binaries (LMXBs) in the central regions of Centaurus A. Out of 440 GC candidates, we ...

    • Mapping the stellar age of the Milky Way bulge with the VVV : II. Deep JK s catalog release based on PSF photometry 

      Surot, F.; Valenti, Elena; Hidalgo, S. L.; Zoccali, M.; Gonzalez, O. A.; Sökmen, E.; Minniti, D.; Rejkuba, M.; Lucas, P. W. (2019-09-01)
      Context. The bulge represents the best compromise between old and massive Galactic components, and as such its study is a valuable opportunity to understand how the bulk of the Milky Way formed and evolved. In addition, ...

    • Milky Way demographics with the VVV survey III : Evidence for a great dark lane in the 157 million star bulge color-magnitude diagram 

      Minniti, D.; Saito, R.K.; Gonzalez, O. A.; Zoccali, M.; Rejkuba, M.; Alonso-Garciá, J.; Benjamin, R.; Catelan, M.; Dékány, I.; Emerson, J.P.; Hempel, M.; Lucas, P.W.; Schultheis, M. (2014-11)
      The new generation of IR surveys are revealing and quantifying Galactic features that provide an improved 3D interpretation of our own Galaxy. We present an analysis of the global distribution of dust clouds in the bulge ...

    • MOA-2011-BLG-262Lb : A sub-earth-mass moon orbiting a gas giant primary or a high velocity planetary system in the galactic bulge 

      Bennett, D. P.; Batista, V.; Bond, I. A.; Bennett, C. S.; Suzuki, D.; Beaulieu, J. P.; Udalski, A.; Donatowicz, J.; Bozza, V.; Abe, F.; Botzler, C. S.; Freeman, M.; Fukunaga, D.; Fukui, A.; Itow, Y.; Koshimoto, N.; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Namba, S.; Ohnishi, K.; Rattenbury, N. J.; Saito, To; Sullivan, D. J.; Sumi, T.; Sweatman, W. L.; Tristram, P.J.; Tsurumi, N.; Wada, K.; Yock, P. C. M.; Albrow, M. D.; Bachelet, E.; Brillant, S.; Caldwell, J.A.R.; Cassan, A.; Cole, A. A.; Corrales, E.; Coutures, C.; Dieters, S.; Dominis Prester, D.; Fouqué, P.; Greenhill, J.; Horne, K.; Koo, J. R.; Kubas, D.; Marquette, J. B.; Martin, R.; Menzies, J.W.; Sahu, K. C.; Wambsganss, J.; Williams, A.; Zub, M.; Choi, J. Y.; Depoy, D. L.; Dong, Subo; Gaudi, B. S.; Gould, A.; Han, C.; Henderson, C. B.; Lee, C. U.; Pogge, R. W.; Shin, I. G.; Yee, J. C.; Szymański, M. K.; Skowron, J.; Poleski, R.; Kozłowski, S.; Wyrzykowski, L.; Kubiak, M.; Pietrukowicz, P.; Pietrzyński, G.; Soszyński, I.; Ulaczyk, K.; Tsapras, Y.; Street, R. A.; Dominik, M.; Bramich, D.M.; Browne, P.; Hundertmark, M.; Kains, N.; Snodgrass, C.; Steele, I.A.; Dekany, I.; Gonzalez, O. A.; Heyrovský, D.; Kandori, R.; Kerins, E.; Lucas, P.W.; Minniti, D.; Nagayama, T.; Rejkuba, M.; Robin, A.C.; Saito, And R. (2014-04-20)
      We present the first microlensing candidate for a free-floating exoplanet-exomoon system, MOA-2011-BLG-262, with a primary lens mass of M host ∼ 4 Jupiter masses hosting a sub-Earth mass moon. The argument for an exomoon ...

    • The most variable VVV sources: eruptive protostars, dipping giants in the Nuclear Disc and others 

      Lucas, P. W.; Smith, L. C.; Guo, Z.; Peña, C. Contreras; Minniti, D.; Miller, N.; Alonso-García, Javier; Catelan, M.; Borissova, J.; Saito, R. K.; Kurtev, R.; Navarro, M. G.; Morris, C.; Muthu, H.; Froebrich, D.; Ivanov, V. D.; Bayo, A.; Garatti, A. Caratti o; Sanders, J. L. (2024-02-01)
      We have performed a comprehensive search of a VISTA Variables in the Via Lactea (VVV) data base of 9.5 yr light curves for variable sources with ΔKs ≥ 4 mag, aiming to provide a large sample of high amplitude eruptive young ...