Search Results - "Gagliuffi, Daniella C. Bardalez"
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The Ultracool SpeXtroscopic Survey. I. Volume-limited Spectroscopic Sample and Luminosity Function of M7−L5 Ultracool Dwarfs
Published in The Astrophysical journal (01-10-2019)“…We present a volume-limited, spectroscopically verified sample of M7−L5 ultracool dwarfs (UCDs) within 25 pc. The sample contains 410 sources, of which 93%…”
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Multiple Patchy Cloud Layers in the Planetary-mass Object SIMP 0136+0933
Published in The Astrophysical journal (01-04-2024)“…Abstract Multiwavelength photometry of brown dwarfs and planetary-mass objects provides insight into their atmospheres and cloud layers. We present…”
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Astrometric Accelerations as Dynamical Beacons: Discovery and Characterization of HIP 21152 B, the First T-dwarf Companion in the Hyades
Published in The Astronomical journal (01-02-2023)“…Abstract Benchmark brown dwarf companions with well-determined ages and model-independent masses are powerful tools to test substellar evolutionary models and…”
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A BROWN DWARF CENSUS FROM THE SIMP SURVEY
Published in The Astrophysical journal (20-10-2016)“…ABSTRACT We have conducted a near-infrared (NIR) proper motion survey, the Sondage Infrarouge de Mouvement Propre, in order to discover field ultracool dwarfs…”
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Astrometric Accelerations as Dynamical Beacons: A Giant Planet Imaged inside the Debris Disk of the Young Star AF Lep
Published in Astrophysical journal. Letters (01-06-2023)“…Abstract We present the direct-imaging discovery of a giant planet orbiting the young star AF Lep, a 1.2 M ⊙ member of the 24 ± 3 Myr β Pic moving group. AF…”
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Simulating Brown Dwarf Observations for Various Mass Functions, Birthrates, and Low-mass Cutoffs
Published in The Astrophysical journal (01-10-2024)“…Abstract After decades of brown dwarf discovery and follow-up, we can now infer the functional form of the mass distribution within 20 pc, which serves as a…”
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JWST/NIRCam 4–5 μm Imaging of the Giant Planet AF Lep b
Published in Astrophysical journal. Letters (01-10-2024)“…Abstract With a dynamical mass of 3 M Jup , the recently discovered giant planet AF Lep b is the lowest-mass imaged planet with a direct mass measurement. Its…”
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SpeX SPECTROSCOPY OF UNRESOLVED VERY LOW MASS BINARIES. II. IDENTIFICATION OF 14 CANDIDATE BINARIES WITH LATE-M/EARLY-L AND T DWARF COMPONENTS
Published in The Astrophysical journal (20-10-2014)“…Multiplicity is a key statistic for understanding the formation of very low mass (VLM) stars and brown dwarfs. Currently, the separation distribution of VLM…”
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On the masses, age, and architecture of the VHS J1256−1257AB b system
Published in Monthly notices of the Royal Astronomical Society (01-02-2023)“…ABSTRACT VHS J1256−1257 AB is an ultracool dwarf binary that hosts a wide-separation planetary-mass companion that is a key target of the JWST Exoplanet Early…”
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WISE 2150-7520AB: A Very Low-mass, Wide Comoving Brown Dwarf System Discovered through the Citizen Science Project Backyard Worlds: Planet 9
Published in The Astrophysical journal (01-02-2020)“…We report the discovery of WISE 2150-7520AB (W2150AB): a widely separated (∼341 au) very low-mass L1 + T8 co-moving system. The system consists of the…”
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The Perkins INfrared Exosatellite Survey (PINES) I. Survey Overview, Reduction Pipeline, and Early Results
Published in The Astronomical journal (01-06-2022)“…Abstract We describe the Perkins INfrared Exosatellite Survey (PINES), a near-infrared photometric search for short-period transiting planets and moons around…”
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An Informed and Systematic Method to Identify Variable Mid-L Dwarfs
Published in The Astrophysical journal (01-06-2024)“…Abstract Most brown dwarfs show some level of photometric or spectral variability. However, finding the most variable dwarfs more suited for a thorough…”
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Examining the Rotation Period Distribution of the 40 Myr Tucana–Horologium Association with TESS
Published in The Astrophysical journal (01-03-2023)“…Abstract The Tucana–Horologium association (Tuc-Hor) is a 40 Myr old moving group in the southern sky. In this work, we measure the rotation periods of 313…”
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WISEA J083011.95+283716.0: A Missing Link Planetary-mass Object
Published in The Astrophysical journal (01-06-2020)“…We present the discovery of WISEA J083011.95+283716.0, the first Y-dwarf candidate identified through the "Backyard Worlds: Planet 9" citizen science project…”
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The Perkins INfrared Exosatellite Survey (PINES). II. Transit Candidates and Implications for Planet Occurrence around L and T Dwarfs
Published in The Astronomical journal (01-12-2022)“…Abstract We describe a new transit-detection algorithm designed to detect single-transit events in discontinuous Perkins INfrared Exosatellite Survey (PINES)…”
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Beyond the Local Volume. II. Population Scaleheights and Ages of Ultracool Dwarfs in Deep HST/WFC3 Parallel Fields
Published in The Astrophysical journal (01-07-2022)“…Abstract Ultracool dwarfs (UCDs) represent a significant proportion of stars in the Milky Way, and deep samples of these sources have the potential to…”
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New Candidate Extreme T Subdwarfs from the Backyard Worlds: Planet 9 Citizen Science Project
Published in The Astrophysical journal (01-07-2021)“…Schneider et al. presented the discovery of WISEA J041451.67−585456.7 and WISEA J181006.18−101000.5, which appear to be the first examples of extreme T-type…”
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Long-term 4.6 μm Variability in Brown Dwarfs and a New Technique for Identifying Brown Dwarf Binary Candidates
Published in The Astronomical journal (01-06-2023)“…Abstract Using a sample of 361 nearby brown dwarfs, we have searched for 4.6 μ m variability, indicative of large-scale rotational modulations or large-scale,…”
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A Late-type L Dwarf at 11 pc Hiding in the Galactic Plane Characterized Using Gaia DR2
Published in The Astrophysical journal (20-11-2018)“…We report on the characterization of a nearby ( pc) ultracool L dwarf (WISE J192512.78+070038.8; hereafter W1925) identified as a faint (G = 20.038 0.009)…”
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Discovery of the Remarkably Red L/T Transition Object VHS J183135.58-551355.9
Published in The Astronomical journal (01-08-2024)“…Abstract We present the discovery of VHS J183135.58−551355.9 (hereafter VHS J1831−5513), an L/T transition dwarf identified as a result of its unusually red…”
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