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A NEAR-INFRARED SPECTROSCOPIC STUDY OF YOUNG FIELD ULTRACOOL DWARFS
- K. Allers, Michael C. Liu
- Physics, Geology
- 20 May 2013
We present a near-infrared (0.9–2.4 μm) spectroscopic study of 73 field ultracool dwarfs having spectroscopic and/or kinematic evidence of youth (≈10–300 Myr). Our sample is composed of 48…
THE EXTREMELY RED, YOUNG L DWARF PSO J318.5338−22.8603: A FREE-FLOATING PLANETARY-MASS ANALOG TO DIRECTLY IMAGED YOUNG GAS-GIANT PLANETS
- Michael C. Liu, E. Magnier, R. Wainscoat
- Physics, Geology
- 1 October 2013
We have discovered using Pan-STARRS1 an extremely red late-L dwarf, which has (J − K)MKO = 2.78 and (J − K)2MASS = 2.84, making it the reddest known field dwarf and second only to 2MASS J1207−39b…
Characterizing Young Brown Dwarfs Using Low-Resolution Near-Infrared Spectra
- K. Allers, D. Jaffe, M. Cushing
- Physics, Geology
- 13 November 2006
We present near-infrared (1.0-2.4 μm) spectra confirming the youth and cool temperatures of six brown dwarfs and low-mass stars with circumstellar disks toward the Chamaeleon II and Ophiuchus…
A STELLAR CENSUS OF THE TUCANA–HOROLOGIUM MOVING GROUP
- A. Kraus, E. Shkolnik, K. Allers, Michael C. Liu
- Physics
- 1 March 2014
We report the selection and spectroscopic confirmation of 129 new late-type (SpT = K3–M6) members of the Tucana–Horologium moving group, a nearby (d ∼ 40 pc), young (τ ∼ 40 Myr) population of…
THE HAWAII INFRARED PARALLAX PROGRAM. II. YOUNG ULTRACOOL FIELD DWARFS
- Michael C. Liu, T. Dupuy, K. Allers
- Geology, Physics
- 7 December 2016
We present a large, uniform analysis of young (≈10–150 Myr) ultracool dwarfs, based on new high-precision infrared (IR) parallaxes for 68 objects. We find that low-gravity (vl-g) late-M and L dwarfs…
Young, Low-Mass Brown Dwarfs with Mid-Infrared Excesses
- K. Allers, J. Kessler-Silacci, L. Cieza, D. Jaffe
- Physics, Geology
- 10 February 2006
We have combined new I, J, H, and Ks imaging of portions of the Chamaeleon II, Lupus I, and Ophiuchus star-forming clouds with 3.6-24 μm imaging from the Spitzer legacy program "From Molecular Cores…
H2 Pure Rotational Lines in the Orion Bar
- K. Allers, D. Jaffe, J. Lacy, B. Draine, M. Richter
- Physics
- 31 May 2005
Photodissociation regions (PDRs), where UV radiation dominates the energetics and chemistry of the neutral gas, contain most of the mass in the dense interstellar medium of our Galaxy. Observations…
All-sky Co-moving Recovery Of Nearby Young Members (ACRONYM). II. The β Pictoris Moving Group
- E. Shkolnik, K. Allers, A. Kraus, Michael C. Liu, L. Flagg
- Physics
- 14 June 2017
We confirm 66 low-mass stellar and brown dwarf systems (K7–M9) plus 19 visual or spectroscopic companions of the β Pictoris moving group (BPMG). Of these, 41 are new discoveries, increasing the known…
2MASS 22344161+4041387AB: A WIDE, YOUNG, ACCRETING, LOW-MASS BINARY IN THE LkHα233 GROUP
- K. Allers, Michael C. Liu, W. Vacca
- Physics, Geology
- 27 February 2009
We report the discovery of a young, 0.″16 binary, 2M2234+4041AB, found as the result of a Keck laser guide star adaptive optics imaging survey of young field ultracool dwarfs. Spatially resolved…
Increased complexity in interstellar chemistry : Detection and chemical modeling of ethyl formate and n-propyl cyanide in Sgr B 2 ( N )
- K. Allers, Michael C. Liu, A. Walsh
- Physics
- 2009
s of recently accepted papers 2MASS 22344161+4041387AB: A Wide, Young, Accreting, Low-mass Binary in the LkHα233 Group K. N. Allers, Michael C. Liu, Evgenya Shkolnik, Michael C. Cushing, Trent J.…
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