Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Kurtev, Radostin"'
Autor:
Yip, Alexandra K. P., Kurtev, Radostin, Pinfield, David J., Marocco, Federico, Gromadzki, Mariusz, Carballo-Bello, Julio A.
Disintegrating multiple systems have been previously discovered from kinematic studies of the $\it Hipparcos$ catalogue. They are presumably the result of dynamical encounters taking place in the Galactic disk between single/multiple systems. In this
Externí odkaz:
http://arxiv.org/abs/2304.02236
Using a novel wide-slit, multi-object approach with the GMOS spectrograph on the 8-meter Gemini South telescope, we have obtained precise time-series spectrophotometry of the binary brown dwarf Luhman 16 at optical wavelengths over two full nights. T
Externí odkaz:
http://arxiv.org/abs/2107.10995
Autor:
Negueruela, Ignacio, Chené, André-Nicolas, Tabernero, Hugo M., Dorda, Ricardo, Borissova, Jura, Marco, Amparo, Kurtev, Radostin
Publikováno v:
MNRAS 505, 1618 (2021)
Obscuration and confusion conspire to limit our knowledge of the inner Milky Way. Even at moderate distances, the identification of stellar systems becomes compounded by the extremely high density of background sources. Here we provide a very reveali
Externí odkaz:
http://arxiv.org/abs/2104.08778
Autor:
Medina, Nicolás, Borissova, Jura, Bayo, Amelia, Kurtev, Radostin, Navarro-Molina, Claudio, Kuhn, Michael, Kumar, Nanda, Lucas, Philip W., Catelan, Márcio, Minniti, Dante, Smith, Leigh C.
Time-varying phenomena are one of the most substantial sources of astrophysical information and their study has led to many fundamental discoveries in modern astronomy. We have developed an automated tool to search and analyze variable sources in the
Externí odkaz:
http://arxiv.org/abs/1806.04061
Autor:
Kuhn, Michael A., Getman, Konstantin V., Feigelson, Eric D., Sills, Alison, Gromadzki, Mariusz, Medina, Nicolás, Borissova, Jordanka, Kurtev, Radostin
The young cluster NGC 6231 (stellar ages ~2-7 Myr) is observed shortly after star-formation activity has ceased. Using the catalog of 2148 probable cluster members obtained from Chandra, VVV, and optical surveys (Paper I), we examine the cluster's sp
Externí odkaz:
http://arxiv.org/abs/1710.01731
We present results from a two-night R~4000 0.9-2.5 micron spectroscopic monitoring campaign of Luhman 16AB (L7.5 + T0.5). We assess the variability amplitude as a function of pressure level in the atmosphere of Luhman 16B: the more variable of the tw
Externí odkaz:
http://arxiv.org/abs/1709.08679
Autor:
Kuhn, Michael A., Medina, Nicolás, Getman, Konstantin V., Feigelson, Eric D., Gromadzki, Mariusz, Borissova, Jordanka, Kurtev, Radostin
NGC 6231 is a young cluster (age ~2-7 Myr) dominating the Sco OB1 association (distance ~1.59 kpc) with ~100 O and B stars and a large pre-main-sequence stellar population. We combine a reanalysis of archival Chandra X-ray data with multi-epoch NIR p
Externí odkaz:
http://arxiv.org/abs/1706.00017
Autor:
Minniti, Dante, Palma, Tali, Dékány, Istvan, Hempel, Maren, Rejkuba, Marina, Pullen, Joyce, Alonso-García, Javier, Barbá, Rodolfo, Barbuy, Beatriz, Bica, Eduardo, Bonatto, Charles, Borissova, Jura, Catelan, Marcio, Carballo-Bello, Julio A., Chene, Andre Nicolas, Clariá, Juan J., Cohen, Roger E., Contreras-Ramos, Rodrigo, Dias, Bruno, Emerson, Jim, Froebrich, Dirk, Buckner, Anne S. M., Geisler, Douglas, Gonzalez, Oscar A., Gran, Felipe, Hagdu, Gergely, Irwin, Mike, Ivanov, Valentin D., Kurtev, Radostin, Lucas, Philip W., Majaess, Daniel, Mauro, Francesco, Moni-Bidin, Christian, Navarrete, Camila, Alegría, Sebastian Ramírez, Saito, Roberto K., Valenti, Elena, Zoccali, Manuela
We use deep multi-epoch near-IR images of the VISTA Variables in the V\'ia L\'actea (VVV) Survey to search for RR Lyrae stars towards the Southern Galactic plane. Here we report the discovery of a group of RR Lyrae stars close together in VVV tile d0
Externí odkaz:
http://arxiv.org/abs/1703.02033
Autor:
Ivanov, Valentin D., Piatti, Andrés E., Beamín, Juan-Carlos, Minniti, Dante, Borissova, Jordanka, Kurtev, Radostin, Hempel, Maren, Saito, Roberto K.
The census of star clusters in the inner Milky Way is incomplete because of extinction and crowding. We embarked on a program to expand the star cluster list in the direction of the inner Milky Way using deep stacks of Ks-band images from the VISTA V
Externí odkaz:
http://arxiv.org/abs/1702.02394
Autor:
Kellogg, Kendra, Metchev, Stanimir, Geissler, Kerstin, Hicks, Shannon, Kirkpatrick, J. Davy, Kurtev, Radostin
We present first results from a targeted search for brown dwarfs with unusual red colors indicative of peculiar atmospheric characteristics. These include objects with low surface gravities or with unusual dust content or cloud properties. From a pos
Externí odkaz:
http://arxiv.org/abs/1510.08464