Zobrazeno 1 - 10
of 356
pro vyhledávání: '"Jörgens, V"'
Publikováno v:
A&A 582, A22 (2015)
We re-analyzed the Herschel/PACS data of a sample of 55 brown dwarfs (BDs) and very low mass stars with spectral types ranging from M5.5 to L0. We investigated the dependence of disk structure on the mass of the central object in the substellar regim
Externí odkaz:
http://arxiv.org/abs/1507.06155
We show that the coolest known object that is probably formed in a star-like mode is a free-floating planet. We discovered recently that the free-floating planetary mass object OTS,44 (M9.5, ~12 Jupiter masses, age ~2 Myr) has significant accretion a
Externí odkaz:
http://arxiv.org/abs/1407.7864
Autor:
Joergens, V., Reffert, S.
The astrometric space mission Gaia is expected to detect a large number of brown dwarf binary systems with close orbits and determine astrometric orbit solutions. This will provide key information for the formation and evolution of brown dwarfs, such
Externí odkaz:
http://arxiv.org/abs/1407.2253
We discover that the very low-mass brown dwarf OTS44 (M9.5, ~12 M_Jup) has significant accretion and a substantial disk, which demonstrates that the processes that accompany canonical star formation occur down to a central mass of a few Jupiter masse
Externí odkaz:
http://arxiv.org/abs/1310.1936
Circumstellar disks are expected to be the birthplaces of planets. The potential for forming one or more planets of various masses is essentially driven by the initial mass of the disks. We present and analyze Herschel/PACS observations of disk-beari
Externí odkaz:
http://arxiv.org/abs/1310.0834
We discover that the very young very low-mass star ISO143 (M5) is driving an outflow based on spectro-astrometry of forbidden [SII] emission lines at 6716A and 6731A observed in UVES/VLT spectra. This adds another object to the handful of brown dwarf
Externí odkaz:
http://arxiv.org/abs/1210.0008
Autor:
Joergens, V., Herczeg, G., Liu, Y., Pascucci, I., Whelan, E., Alcala, J., Biazzo, K., Costigan, G., Gully-Santiago, M., Henning, Th., Natta, A., Rigliaco, E., Rodriguez-Ledesma, V., Sicilia-Aguilar, A., Tottle, J., Wolf, S.
Characterization of the properties of young brown dwarfs are important to constraining the formation of objects at the extreme low-mass end of the IMF. While young brown dwarfs share many properties with solar-mass T Tauri stars, differences may be u
Externí odkaz:
http://arxiv.org/abs/1208.0596
We show that the very young brown dwarf candidate ISO217 (M6.25) is driving an intrinsically asymmetric bipolar outflow with a stronger and slightly faster red-shifted component based on spectro-astrometry of forbidden [SII] emission lines observed i
Externí odkaz:
http://arxiv.org/abs/1205.3166
The pre-main sequence star CHXR74 (M4.25) in ChaI was detected a few years ago to be a very low-mass spectroscopic binary. Determination of its mass would provide a valuable dynamical mass measurement at young ages in the poorly constrained mass regi
Externí odkaz:
http://arxiv.org/abs/1111.0968
We present the results of a high-resolution spectral differential imaging survey of 12 nearby, relatively young field L dwarfs (<1 Gyr) carried out with HST/NICMOS to search for planetary mass companions at small physical separations from their host.
Externí odkaz:
http://arxiv.org/abs/1009.1872