Navegação Ciências Exatas e da Terra por Autor "Lee, Brian L."

Resultados 1-9 de 9

    • Accurate atmospheric parameters at moderate resolution using spectral indices : preliminary application to the MARVELS survey 

      Ghezzi, Luan; Ferreira, Letícia D.; Lorenzo-Oliveira, Diego; Mello, Gustavo Frederico Porto de; Santiago, Basilio Xavier; De Lee, Nathan M.; Lee, Brian L.; Costa, Luiz N. da; Maia, Marcio Antonio Geimba; Ogando, Ricardo L.C.; Wisniewski, J.P.; González Hernández, Jonay I.; Stassun, Keivan G.; Fleming, S.W.; Schneider, D.P.; Mahadevan, Suvrath; Cargile, Phillip A.; Ge, Jian; Pepper, J.; Wang, Ji; Paegert, Martin (2014) [Artigo de periódico]
      Studies of Galactic chemical, and dynamical evolution in the solar neighborhood depend on the availability of precise atmospheric parameters (effective temperature Teff, metallicity [Fe/H], and surface gravity log g) for ...

    • A cautionary tale : marvels brown dwarf candidate reveals itself to be a very long period, highly eccentric spectroscopic stellar binary 

      Mack, C. E.; Ge, Jian; Deshpande, Rohit; Wisniewski, J.P.; Stassun, Keivan G.; Gaudi, B. S.; Fleming, S.W.; Mahadevan, Suvrath; De Lee, Nathan M.; Eastman, Jason; Ghezzi, Luan; González Hernández, Jonay I.; Femenía Castellá, B.; Ferreira, Letícia D.; Mello, Gustavo Frederico Porto de; Crepp, Justin R.; Mata Sánchez, Daniel; Agol, Eric; Beatty, Thomas G.; Bizyaev, D.; Brewington, Howard J.; Cargile, Phillip A.; Costa, Luiz N. da; Esposito, Massimiliano; Ebelke, Garrett L.; Hebb, Leslie; Jiang, Peng; Kane, Stephen R.; Lee, Brian L.; Maia, Marcio Antonio Geimba; Malanushenko, E.; Malanushenko, V.; Oravetz, Daniel J.; Paegert, Martin; Pan, K.; Allende Prieto, Carlos; Pepper, J.; Rebolo, Rafael; Roy, Arpita; Santiago, Basilio Xavier; Schneider, D.P.; Simmons, Audrey E.; Siverd, Robert J.; Snedden, S.A.; Tofflemire, Benjamin M. (2013) [Artigo de periódico]
      We report the discovery of a highly eccentric, double-lined spectroscopic binary star system (TYC 3010-1494-1), comprising two solar-type stars that we had initially identified as a single star with a brown dwarf companion. ...

    • Exploring the brown dwarf desert : new substellar companions from the SDSS-III MARVELS survey 

      Grieves, Nolan; Ge, Jian; Thomas, N.; Ma, Bo; Sithajan, Sirinrat; Ghezzi, Luan; Kimock, Benjamin; Willis, Kevin; De Lee, Nathan M.; Lee, Brian L.; Fleming, S.W.; Agol, Eric; Troup, Nicholas W.; Paegert, Martin; Schneider, D.P.; Stassun, Keivan G.; Városi, Frank; Zhao, Bo; Liu, Jian; Li, Rui; Mello, Gustavo Frederico Porto de; Bizyaev, D.; Pan, K.; Ferreira, Letícia D.; Lorenzo-Oliveira, Diego; Santiago, Basilio Xavier; Costa, Luiz N. da; Maia, Marcio Antonio Geimba; Ogando, Ricardo L.C.; Del Peloso, Eduardo Fernandez (2017) [Artigo de periódico]
      Planet searches using the radial velocity technique show a paucity of companions to solar-type stars within ∼5 au in the mass range of ∼10–80 MJup. This deficit, known as the brown dwarf desert, currently has no conclusive ...

    • Marvels-1 : a face-on double-lined binary star masquerading as a resonant planetary system and consideration of rare false positives in radial velocity planet searches 

      Wright, Jason Thomas; Roy, Arpita; Mahadevan, Suvrath; Wang, Sharon Xuesong; Ford, Eric B.; Payne, Matthew John; Lee, Brian L.; Wang, Ji; Crepp, Justin R.; Gaudi, B. S.; Eastman, Jason; Pepper, J.; Ge, Jian; Fleming, S.W.; Ghezzi, Luan; González Hernández, Jonay I.; Cargile, Phillip A.; Stassun, Keivan G.; Wisniewski, J.P.; Ferreira, Letícia D.; Mello, Gustavo Frederico Porto de; Maia, Marcio Antonio Geimba; Costa, Luiz N. da; Ogando, Ricardo L.C.; Santiago, Basilio Xavier; Schneider, D.P.; Hearty, Frederick R. (2013) [Artigo de periódico]
      We have analyzed new and previously published radial velocity (RV) observations of MARVELS-1, known to have an ostensibly substellar companion in a ∼6 day orbit. We find significant (∼100ms-ˡ) residuals to the best-fit ...

    • Very low mass stellar and substellar companions to solar-like stars from MARVELS. I. A low-mass ratio stellar companion to TYC 4110-01037-1 in a 79 day orbit 

      Wisniewski, J.P.; Ge, Jian; Crepp, Justin R.; De Lee, Nathan M.; Eastman, Jason; Esposito, Massimiliano; Fleming, S.W.; Gaudi, B. S.; Ghezzi, Luan; González Hernández, Jonay I.; Lee, Brian L.; Stassun, Keivan G.; Agol, Eric; Allende Prieto, Carlos; Barnes, Rory; Bizyaev, D.; Cargile, Phillip A.; Chang, Liang; Costa, Luiz N. da; Mello, Gustavo Frederico Porto de; Femenía Castellá, B.; Ferreira, Letícia D.; Gary, Bruce L.; Hebb, Leslie; Holtzman, J.A.; Liu, Jian; Ma, Bo; Mack, C. E.; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Nguyen, D.C.; Ogando, Ricardo L.C.; Oravetz, Daniel J.; Paegert, Martin; Pan, K.; Pepper, J.; Rebolo, Rafael; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Simmons, Audrey E.; Tofflemire, Benjamin M.; Wan, Xiaoke; Wang, Ji; Zhao, Bo (2012) [Artigo de periódico]
      TYC 4110-01037-1 has a low-mass stellar companion, whose small mass ratio and short orbital period are atypical among binary systems with solar-like (Teff 6000 K) primary stars. Our analysis of TYC 4110-01037-1 reveals it ...

    • Very low mass stellar and substellar companions to solar-like stars from MARVELS. II. A short-period companios orbiting an F star with evidence of a stellar tertiary and significant mutual inclination 

      Fleming, S.W.; Jian Ge; Barnes, Rory; Beatty, Thomas G.; Crepp, Justin R.; De Lee, Nathan M.; Esposito, Massimiliano; Femenía Castellá, B.; Ferreira, Letícia D.; Gary, Bruce L.; Gaudi, B. S.; Ghezzi, Luan; González Hernández, Jonay I.; Hebb, Leslie; Jiang, Peng; Lee, Brian L.; Nelson, Ben; Mello, Gustavo Frederico Porto de; Shappee, Benjamin J.; Stassun, Keivan G.; Thompson, Todd; Tofflemire, Benjamin M.; Wisniewski, J.P.; Wood-Vasey, W.M.; Agol, Eric; Allende Prieto, Carlos; Bizyaev, D.; Brewington, Howard J.; Cargile, Phillip A.; Coban, Louis; Costello, Korena S.; Costa, Luiz N. da; Good, Melanie L.; Hua, Nelson; Kane, Stephen R.; Lander, Gary R.; Liu, Jian; Ma, Bo; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Malanushenko, E.; Malanushenko, V.; Muna, Demitri; Nguyen, D.C.; Oravetz, Daniel J.; Paegert, Martin; Pan, K.; Pepper, J.; Rebolo, Rafael; Roebuck, Eric J.; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Simmons, Audrey E.; Sivarani, Thirupathi; Snedden, S.A.; Vincent, Chelsea L. M.; Wan, Xiaoke; Wang, Ji; Weaver, Benjamin A.; Weaver, Gwendolyn M.; Zhao, Bo (2012) [Artigo de periódico]
      We report the discovery via radial velocity (RV) measurements of a short-period (P = 2.430420±0.000006 days) companion to the F-type main-sequence star TYC 2930-00872-1. A long-term trend in the RV data also suggests the ...

    • Very low mass stellar and substellar companions to solar-like stars from MARVELS. IV. A candidate bronw dwarf or low-mass stellar companion HIP 67526 

      Jiang, Peng; Ge, Jian; Cargile, Phillip A.; Crepp, Justin R.; De Lee, Nathan M.; Mello, Gustavo Frederico Porto de; Esposito, Massimiliano; Ferreira, Letícia D.; Femenía Castellá, B.; Fleming, S.W.; Gaudi, B. S.; Ghezzi, Luan; González Hernández, Jonay I.; Hebb, Leslie; Lee, Brian L.; Ma, Bo; Stassun, Keivan G.; Wang, Ji; Wisniewski, J.P.; Agol, Eric; Bizyaev, D.; Brewington, Howard J.; Chang, Liang; Costa, Luiz N. da; Eastman, Jason; Ebelke, Garrett L.; Gary, Bruce L.; Kane, Stephen R.; Li, Rui; Liu, Jian; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Malanushenko, V.; Malanushenko, E.; Muna, Demitri; Nguyen, D.C.; Ogando, Ricardo L.C.; Oravetz, Audrey; Oravetz, Daniel J.; Pan, K.; Pepper, J.; Paegert, Martin; Allende Prieto, Carlos; Rebolo, Rafael; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Sivarani, Thirupathi; Snedden, S.A.; Van Eyken, Julian C.; Wan, Xiaoke; Weaver, Benjamin A.; Zhao, Bo (2013) [Artigo de periódico]
      We report the discovery of a candidate brown dwarf (BD) or a very low mass stellar companion (MARVELS-5b) to the star HIP 67526 from the Multi-object Apache point observatory Radial Velocity Exoplanet Large-area Survey ...

    • Very low mass stellar and substellar companions to solar-like stars from MARVELS. V. A low eccentricity brown dwarf from the driest part of the desert, marvels-6b 

      De Lee, Nathan M.; Ge, Jian; Crepp, Justin R.; Eastman, Jason; Esposito, Massimiliano; Femenía Castellá, B.; Fleming, S.W.; Gaudi, B. S.; Ghezzi, Luan; González Hernández, Jonay I.; Lee, Brian L.; Stassun, Keivan G.; Wisniewski, J.P.; Wood-Vasey, W.M.; Agol, Eric; Allende Prieto, Carlos; Barnes, Rory; Bizyaev, D.; Cargile, Phillip A.; Chang, Liang; Costa, Luiz N. da; Mello, Gustavo Frederico Porto de; Ferreira, Letícia D.; Gary, Bruce L.; Hebb, Leslie; Holtzman, J.A.; Liu, Jian; Ma, Bo; Mack, C. E.; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Nguyen, D.C.; Oravetz, Audrey; Oravetz, Daniel J.; Paegert, Martin; Pan, K.; Pepper, J.; Malanushenko, E.; Malanushenko, V.; Rebolo, Rafael; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Wan, Xiaoke; Wang, Ji; Zhao, Bo (2013) [Artigo de periódico]
      We describe the discovery of a likely brown dwarf (BD) companion with a minimum mass of 31.7 ± 2.0 MJup to GSC 03546-01452 from the MARVELS radial velocity survey, which we designate as MARVELS-6b. For reasonable priors, ...

    • Very-low-mass stellar and substellar companion to solar-like stars from MARVELS. III. A short-period brown dwarf cadidate around an active G0IV subgiant 

      Ma, Bo; Ge, Jian; Barnes, Rory; Crepp, Justin R.; De Lee, Nathan M.; Ferreira, Letícia D.; Esposito, Massimiliano; Femenía Castellá, B.; Fleming, S.W.; Gaudi, B. S.; Ghezzi, Luan; Hebb, Leslie; González Hernández, Jonay I.; Lee, Brian L.; Mello, Gustavo Frederico Porto de; Stassun, Keivan G.; Wang, Ji; Wisniewski, J.P.; Agol, Eric; Bizyaev, D.; Cargile, Phillip A.; Chang, Liang; Costa, Luiz N. da; Eastman, Jason; Gary, Bruce L.; Jiang, Peng; Kane, Stephen R.; Li, Rui; Liu, Jian; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Muna, Demitri; Nguyen, D.C.; Ogando, Ricardo L.C.; Oravetz, Daniel J.; Pepper, J.; Paegert, Martin; Allende Prieto, Carlos; Rebolo, Rafael; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Simmons, Audrey E.; Sivarani, Thirupathi; Van Eyken, Julian C.; Wan, Xiaoke; Weaver, Benjamin A.; Zhao, Bo (2013) [Artigo de periódico]
      We present an eccentric, short-period brown dwarf candidate orbiting the active, slightly evolved subgiant star TYC 2087-00255-1, which has effective temperature Teff = 5903±42 K, surface gravity log(g) = 4.07±0.16 (cgs), ...