66 citations · 455 across the 19 of their papers we have counts for
12 papers · 1 filter
Multi-Epoch Stability in the Rotational Modulation of the Planetary-Mass Companion Ross 458C
Elena Manjavacas, Jared Bull, Paulo Miles-Paez +7
Spectroscopic variability is detected in brown dwarfs across all spectral types, suggesting atmospheric patchiness in brown dwarf atmospheres. We present JWST/NIRSpec time series o…
First detection of a disk free of volatile elements around a young A-type star: A sign of collisions between rocky planets?
M. E. van den Ancker, N. P. Gentile Fusillo, T. J. Haworth +7
Aims. We present the first detailed analysis of the astrophysical parameters of the poorly studied Sco-Cen member HD 152384 and its circumstellar environment. Methods. We analyze n…
Weather on Other Worlds. V. The Three Most Rapidly Rotating Ultra-Cool Dwarfs
Megan E. Tannock, Stanimir Metchev, Aren Heinze +7
We present the discovery of rapid photometric variability in three ultra-cool dwarfs from long-duration monitoring with the Spitzer Space Telescope. The T7, L3.5, and L8 dwarfs hav…
Cloud Atlas: Unraveling the vertical cloud structure with the time-series spectrophotometry of an unusually red brown dwarf
Ben W. P. Lew, Dániel Apai, Mark Marley +8
Rotational modulations of emission spectra in brown dwarf and exoplanet atmospheres show that clouds are often distributed non-uniformly in these ultracool atmospheres. The spatial…
Cloud Atlas: Variability in and out of the Water Band in the Planetary-mass HD 203030B Points to Cloud Sedimentation in Low-gravity L Dwarfs
Paulo A. Miles-Páez, Stanimir Metchev, Dániel Apai +11
We use the Wide Field Camera 3 on the {\sl Hubble Space Telescope} to spectrophotometrically monitor the young L7.5 companion HD~203030B. Our time series reveal photometric variabi…
The Prototypical Young L/T-Transition Dwarf HD 203030B Likely Has Planetary Mass
Paulo A. Miles-Páez, Stanimir A. Metchev, Kevin L. Luhman +2
Upon its discovery in 2006, the young L7.5 companion to the solar analog HD 203030 was found to be unusual in being 200 K cooler than older late-L dwarfs. HD 203030B offer…
Rotation periods and photometric variability of rapidly rotating ultra-cool dwarfs
P. A. Miles-Páez, E. Pallé, M. R. Zapatero Osorio
We used the optical and near-infrared imagers located on the Liverpool, the IAC80, and the William Herschel telescopes to monitor 18 M7L9.5 dwarfs with the objective of measurin…
A Statistical Survey of Peculiar L and T Dwarfs in SDSS, 2MASS, and WISE
Kendra Kellogg, Stanimir Metchev, Paulo A. Miles-Páez +1
We present the final results from a targeted search for brown dwarfs with unusual near-infrared colors. From a positional cross-match of SDSS, 2MASS and WISE, we have identified 14…
Spectroscopic follow-up of L- and T-type proper-motion member candidates in the Pleiades
M. R. Zapatero Osorio, V. J. S. Béjar, E. L. Martín +9
(Abridged) We report on the near-infrared low-resolution spectroscopy and red optical (Z-band) photometry of seven proper-motion, very low-mass substellar member candidates of the…
Trigonometric parallaxes of young field L dwarfs
M. R. Zapatero Osorio, V. J. S. Béjar, P. Miles-Páez +3
(Abridged) We aim to determine the trigonometric parallaxes and proper motions of a sample of ten field L0-L5 dwarfs with spectroscopic evidence for low-gravity atmospheres. We obt…
Linear polarization of rapidly rotating ultracool dwarfs
Paulo Alberto Miles-Páez, María Rosa Zapatero Osorio, Enric Pallé +1
Aims. We aim at studying the near infrared linear polarization signal of rapidly rotating ultracool dwarfs with spectral types ranging from M7 through T2 and projected rotational v…
Identification of red high proper-motion objects in Tycho-2 and 2MASS catalogues using Virtual Observatory tools
F. M. Jiménez-Esteban, J. A. Caballero, R. Dorda +2
Aims: With available Virtual Observatory tools, we looked for new M dwarfs in the solar neighbourhood and M giants with high tangential velocities. Methods: From an all-sky cross-m…