Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Lucas, Philip W."'
Episodic accretion is one of the competing models to explain the observed luminosity spread in young stellar clusters. These short-lived high accretion events could also have a strong impact on planet formation. Observations of high-amplitude variabi
Externí odkaz:
http://arxiv.org/abs/2401.14472
Autor:
Donoso, Laura G., Pichel, Ana, Baravalle, Laura D., Alonso, M. Victoria, Schmidt, Eduardo O., Minniti, Dante, Masetti, Nicola, Smith, Leigh C., Lucas, Philip W., Villalon, Carolina, Rovero, Adrián C., Coldwell, Georgina
We identified Active Galactic Nuclei (AGN) candidates as counterparts to unidentified gamma-ray sources (UGS) from the Fermi-LAT Fourth Source Catalogue at lower Galactic latitudes. Our methodology is based on the use of near- and mid-infrared photom
Externí odkaz:
http://arxiv.org/abs/2401.05542
Autor:
Ferreira, Thiago, Saito, Roberto K., Minniti, Dante, Mejías, Andrea, Caceres, Claudio, Alonso-García, Javier, Beamín, Juan Carlos, Smith, Leigh C., Gomez, Matías, Lucas, Philip W., Ivanov, Valentin D.
We present the discovery and multi-wavelength characterisation of VVV J1438-6158 AB, a new field wide-binary system consisting of a 4.6(+5.5-2.4) Gyr and Teff = 9500+/-125 K DA white dwarf (WD) and a Teff = 2400+/-50 K M8 ultracool dwarf (UCD). The p
Externí odkaz:
http://arxiv.org/abs/2312.10158
Autor:
Saito, Roberto K., Stecklum, Bringfried, Minniti, Dante, Lucas, Philip W., Guo, Zhen, Smith, Leigh C., Fraga, Luciano, Navarete, Felipe, Beamín, Juan Carlos, Morris, Calum
We report the serendipitous discovery of VVV-WIT-12, an unusual variable source that seems to induce variability in its surrounding nebula. The source belongs to the rare objects that we call WITs (short for What Is This?) discovered within the VISTA
Externí odkaz:
http://arxiv.org/abs/2311.01593
Autor:
Siwak, Michał, Hillenbrand, Lynne A., Kóspál, Ágnes, Ábrahám, Péter, Giannini, Teresa, De, Kishalay, Moór, Attila, Szilágyi, Máté, Janík, Jan, Koen, Chris, Park, Sunkyung, Nagy, Zsófia, de Miera, Fernando Cruz-Sáenz, Fiorellino, Eleonora, Marton, Gábor, Kun, Mária, Lucas, Philip W., Udalski, Andrzej, Szabó, Zsófia Marianna
Gaia21bty, a pre-main sequence star that previously had shown aperiodic dips in its light curve, underwent a considerable $\Delta G\approx2.9$ mag brightening that occurred over a few months between 2020 October - 2021 February. The Gaia lightcurve s
Externí odkaz:
http://arxiv.org/abs/2307.08802
Roman Early-Definition Astrophysics Survey Opportunity: Galactic Roman Infrared Plane Survey (GRIPS)
Autor:
Paladini, Roberta, Zucker, Catherine, Benjamin, Robert, Nataf, David, Minniti, Dante, Zasowski, Gail, Peek, Joshua, Carey, Sean, Allen, Lori, Alonso-Garcia, Javier, Alves, Joao, Anders, Friederich, Athanassoula, Evangelie, Beers, Timothy C., Bird, Jonathan, Bland-Hwathorn, Joss, Brown, Anthony, Buder, Sven, Casagrande, Luca, Casey, Andrew, Cassisi, Santi, Catelan, Marcio, Chary, Ranga-Ram, Chene, Andre-Nicolas, Ciardi, David, Comeron, Fernando, Cohen, Roger, Dame, Thomas, Drimmel, Ronald, Trincado, Jose Fernandez, Finkbeiner, Douglas, Geisler, Douglas, Gennaro, Mario, Goodman, Alyssa, Green, Gregory, Hajdu, Gergely, Henderson, Calen, Hora, Joseph, Ivanov, Valentin D., Kirkpatrick, Davy, Kobayashi, Chiaki, Kuhn, Michael, Kunder, Andres, Lu, Jessica, Lucas, Philip W., Majaess, Daniel, Megeath, S. Thomas, Meisner, Aaron, Molinari, Sergio, Mroz, Przemek, Ness, Meliss, Neumayer, Nadine, Nogueras-Lara, Francisco, Noriega-Crespo, Alberto, Poleski, Radek, Rix, Hans-Walter, Rebull, Luisa, Reggiani, Henrique, Rejkuba, Marina, Saito, Roberto K., Schoenrich, Ralph, Saydjari, Andrew, Schisano, Eugenio, Schlafly, Edward, Schlaufman, Keving, Smith, Leigh, Speagle, Joshua, Wisz, Dan, Wyse, Rosemary, Zakamska, Nadia
A wide-field near-infrared survey of the Galactic disk and bulge/bar(s) is supported by a large representation of the community of Galactic astronomers. The combination of sensitivity, angular resolution and large field of view make Roman uniquely ab
Externí odkaz:
http://arxiv.org/abs/2307.07642
Autor:
Baravalle, Laura D., Schmidt, Eduardo O., Alonso, M. Victoria, Pichel, Ana, Minniti, Dante, Rodríguez-Kamenetzky, Adriana R., Masetti, Nicola, Villalon, Carolina, Smith, Leigh C., Lucas, Philip W.
The goal of this work is to search for Active Galactic Nuclei (AGN) in the Galactic disc at very low latitudes with |b| $<$ 2$^\circ$. For this, we studied the five sources from the VVV near-infrared galaxy catalogue that have also WISE counterparts
Externí odkaz:
http://arxiv.org/abs/2302.05595
Autor:
Sanders, Jason L., Matsunaga, Noriyuki, Kawata, Daisuke, Smith, Leigh C., Minniti, Dante, Lucas, Philip W.
The properties of the Milky Way's nuclear stellar disc give crucial information on the epoch of bar formation. Mira variables are promising bright candidates to study the nuclear stellar disc, and through their period-age relation dissect its star fo
Externí odkaz:
http://arxiv.org/abs/2208.04966
Autor:
Smith, Leigh C., Koposov, Sergey E., Lucas, Philip W., Sanders, Jason L., Minniti, Dante, Udalski, Andrzej, Evans, N. Wyn, Aguado, David, Ivanov, Valentin D., Saito, Roberto K., Fraga, Luciano, Pietrukowicz, Pawel, Penoyre, Zephyr, González-Fernández, Carlos
We report the serendipitous discovery of a late-type giant star that exhibited a smooth, eclipse-like drop in flux to a depth of 97 per cent. Minimum flux occurred in April 2012 and the total event duration was a few hundred days. Light curves in V,
Externí odkaz:
http://arxiv.org/abs/2106.05300
Autor:
Minniti, Dante, Fernández-Trincado, José G., Gómez, Matías, Smith, Leigh C., Lucas, Philip W., Ramos, R. Contreras
Context. We report the discovery of VVV-CL160, a new nearby globular cluster (GC) with extreme kinematics, located in the Galactic plane at $l = 10.1477$ deg, $b = 0.2999$ deg. Aims. We aim to characterize the physical properties of this new GC and p
Externí odkaz:
http://arxiv.org/abs/2106.01383