Photometric study of ultracool dwarfs and M dwarfs: preliminary results

被引：0
|
作者：
Belcheva, Gergana M. [1 ]
Ovcharov, Evgeni P. [2 ]
Antonova, Antoaneta E. [2 ]
机构：
[1] Univ Sussex, Dept Phys & Astron, Brighton, E Sussex, England
[2] Univ Sofia, Dept Astron, BG-1164 Sofia, Bulgaria
来源：
BULGARIAN ASTRONOMICAL JOURNAL | 2012年 / 18卷 / 02期
关键词：
cool stars; brown dwarfs; photometry; activity;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present preliminary results of V, R, I photometric observations of 7 late type dwarfs of spectral types from M4 to T7. These dwarfs have little or no previous optical photometric studies and are part of a long-term program studying the activity at the bottom of the Main Sequence and the brown dwarf regime. We have obtained R and I magnitudes for all 7 dwarfs as well as V magnitudes for 3 of them. This is the first step towards characterization of their photometric properties and monitoring for variability which in turn will give us information of the physical nature of their atmospheres.
引用
收藏
页码：84 / 87
页数：4
相关论文
共 50 条
  • [21] A method for selecting M dwarfs with an increased likelihood of unresolved ultracool companionship
    Cook, N. J.
    Pinfield, D. J.
    Marocco, F.
    Burningham, B.
    Jones, H. R. A.
    Frith, J.
    Zhong, J.
    Luo, A. L.
    Qi, Z. X.
    Lucas, P. W.
    Gromadzki, M.
    Day-Jones, A. C.
    Kurtev, R. G.
    Guo, Y. X.
    Wang, Y. F.
    Bai, Y.
    Yi, Z. P.
    Smart, R. L.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2016, 457 (02) : 2192 - 2208
  • [22] Finding ultracool brown dwarfs with MegaCam on CFHT:: method and first results
    Delorme, P.
    Willott, C. J.
    Forveille, T.
    Delfosse, X.
    Reyle, C.
    Bertin, E.
    Albert, L.
    Artigau, E.
    Robin, A. C.
    Allard, F.
    Doyon, R.
    Hill, G. J.
    ASTRONOMY & ASTROPHYSICS, 2008, 484 (02) : 469 - 478
  • [23] Finding ultracool brown dwarfs with MegaCam on CFHT: Method and first results
    Delorme, P.
    Willott, C.J.
    Forveille, T.
    Delfosse, X.
    Reylé, C.
    Bertin, E.
    Albert, L.
    Artigau, E.
    Robin, A.C.
    Allard, F.
    Doyon, R.
    Hill, G.J.
    Astronomy and Astrophysics, 2008, 484 (02): : 469 - 478
  • [24] Ultracool white dwarfs and the age of the Galactic disc
    Gianninas, A.
    Curd, B.
    Thorstensen, John R.
    Kilic, Mukremin
    Bergeron, P.
    Andrews, Jeff J.
    Canton, Paul
    Agueeros, M. A.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 449 (04) : 3966 - 3980
  • [25] Linear polarization of rapidly rotating ultracool dwarfs
    Miles-Paez, P. A.
    Zapatero Osorio, M. R.
    Palle, E.
    Pena Ramirez, K.
    ASTRONOMY & ASTROPHYSICS, 2013, 556
  • [26] New Ultracool Companions to Nearby White Dwarfs
    Bravo, Alexia
    Schneider, Adam C.
    Casewell, Sarah
    Rothermich, Austin
    Faherty, Jacqueline K.
    French, Jenni R.
    Bickle, Thomas P.
    Meisner, Aaron M.
    Kirkpatrick, J. Davy
    Kuchner, Marc J.
    Burgasser, Adam J.
    Marocco, Federico
    Debes, John H.
    Sainio, Arttu
    Gramaize, Leopold
    Kiwy, Frank
    Jalowiczor, Peter A.
    Abdullahi, Awab
    ASTRONOMICAL JOURNAL, 2025, 169 (02):
  • [27] Ultracool dwarfs in Gaia DR3☆
    Sarro, L. M.
    Berihuete, A.
    Smart, R. L.
    Reyle, C.
    Barrado, D.
    Garcia-Torres, M.
    Cooper, W. J.
    Jones, H. R. A.
    Marocco, F.
    Creevey, O. L.
    Sordo, R.
    Bailer-Jones, C. A. L.
    Montegriffo, P.
    Carballo, R.
    Andrae, R.
    Fouesneau, M.
    Lanzafame, A. C.
    Pailler, F.
    Thevenin, F.
    Lobel, A.
    Delchambre, L.
    Korn, A. J.
    Recio-Blanco, A.
    Schultheis, M. S.
    De Angeli, F.
    Brouillet, N.
    Casamiquela, L.
    Contursi, G.
    de Laverny, P.
    Garcia-Lario, P.
    Kordopatis, G.
    Lebreton, Y.
    Livanou, E.
    Lorca, A.
    Palicio, P. A.
    Slezak-Oreshina, I.
    Soubiran, C.
    Ulla, A.
    Zhao, H.
    ASTRONOMY & ASTROPHYSICS, 2023, 669
  • [28] Flares from ultracool L dwarfs with Kepler
    Gizis, John E.
    Paudel, Rishi
    Williams, Peter K. G.
    Burgasser, Adam J.
    Schmidt, Sarah J.
    SOLAR AND STELLAR FLARES AND THEIR EFFECTS ON PLANETS, 2016, 11 (S320): : 153 - 154
  • [29] New nearby, bright southern ultracool dwarfs
    Kendall, T. R.
    Jones, H. R. A.
    Pinfield, D. J.
    Pokorny, R. S.
    Folkes, S.
    Weights, D.
    Jenkins, J. S.
    Mauron, N.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 374 (02) : 445 - 454
  • [30] Atomic lines in infrared spectra for ultracool dwarfs
    Lyubchik, Y
    Jones, HRA
    Pavlenko, YV
    Viti, S
    Pickering, JC
    Blackwell-Whitehead, R
    ASTRONOMY & ASTROPHYSICS, 2004, 416 (02) : 655 - 659
12345