Browsing by Author "Kumar, M. S. N."

Now showing items 1-7 of 7

    • 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 ...

    • Binary system and jet precession and expansion in G35.20-0.74N 

      Beltran, Maite; Cesaroni, Riccardo; Moscadelli, Luca; Sanchez-Monge, Alvaro; Hirota, Tomboy; Kumar, M. S. N. (2016-09-15)
      Context. Atacama Large Millimeter/submillimeter Array (ALMA) observations of the high-mass star-forming region G35.20-0.74N have revealed the presence of a Keplerian disk in core B rotating about a massive object of 18 M⊙, ...

    • 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 ...

    • Highly variable young massive stars in ATLASGAL clumps 

      Kumar, M. S. N.; Contreras-Pena, C.; Lucas, P. W.; Thompson, M. A. (2016-12-05)
      High-amplitude variability in Young Stellar Objects (YSOs) is usually associated with episodic accretion events. It has not been observed so far in massive YSOs. Here, the high-amplitude variable star sample of ContrerasPena ...

    • New Galactic star clusters discovered in the VVV survey 

      Borissova, J.; Bonatto, C.; Kurtev, R.; Clarke, J. R. A.; Penaloza, F.; Sale, S. E.; Minniti, D.; Alonso-Garcia, J.; Artigau, E.; Barba, R.; Bica, E.; Baume, G. L.; Catelan, M.; Chene, A. N.; Dias, B.; Folkes, S. L.; Froebrich, D.; Geisler, D.; de Grijs, R.; Hanson, M. M.; Hempel, M.; Ivanov, V. D.; Kumar, M. S. N.; Lucas, P.W.; Mauro, F.; Moni Bidin, C.; Rejkuba, M.; Saito, R. K.; Tamura, M.; Toledo, I. (2011-08)
      Context. VISTA Variables in the Via Lactea (VVV) is one of the six ESO Public Surveys operating on the new 4-m Visible and Infrared Survey Telescope for Astronomy (VISTA). VVV is scanning the Milky Way bulge and an adjacent ...

    • Photometric variability of massive young stellar objects 

      Teixeira, G. D. C.; Kumar, M. S. N.; Smith, L.; Lucas, P. W.; Morris, C.; Borissova, J.; Monteiro, M. J. P. F. G.; Garatti, A. Caratti o; Peña, C. Contreras; Froebrich, Dirk; Gameiro, J. F. (2018-11-05)
      The Vista Variables in the Via Lactea (VVV) survey has allowed for an unprecedented number of multi-epoch observations of the southern Galactic plane. In a recent paper, 13 massive young stellar objects (MYSOs) have already ...

    • UWISH2-the UKIRT Widefield Infrared Survey for H-2 

      Froebrich, D.; Davis, C. J.; Ioannidis, G.; Gledhill, T.; Takami, M.; Chrysostomou, A.; Drew, J.; Eisloeffel, J.; Gosling, A.; Gredel, R.; Hatchell, J.; Hodapp, K. W.; Kumar, M. S. N.; Lucas, P.W.; Matthews, H.; Rawlings, M. G.; Smith, M. D.; Stecklum, B.; Varricatt, W. P.; Lee, H. T.; Teixeira, P. S.; Aspin, C.; Khanzadyan, T.; Karr, J.; Kim, H. -J.; Koo, B. -C.; Lee, J. J.; Lee, Y. -H.; Magakian, T. Y.; Movsessian, T. A.; Nikogossian, E. H.; Pyo, T. S.; Stanke, T. (2011-05)
      We present the goals and preliminary results of an unbiased, near-infrared, narrow-band imaging survey of the first galactic quadrant (10 degrees < l < 65 degrees; -1<file name="mnr_18149_mu1.gif" type="gif"/>3 < b < +1<file ...