Results 91 to 100 of about 83,683 (249)

Comparing Grid Model Fitting Methodologies for Low-temperature Atmospheres: Markov Chain Monte Carlo versus Random Forest Retrieval

The Astrophysical Journal
The atmospheres of low-temperature stars, brown dwarfs, and exoplanets are challenging to model due to strong molecular features and complex gas and condensate chemistry.
Anna Lueber, Adam J. Burgasser
doaj   +1 more source

Contemporaneous Observations of Hα Luminosities and Photometric Amplitudes for M Dwarfs

The Astronomical Journal, 2023
While many M dwarfs are known to have strong magnetic fields and high levels of magnetic activity, we are still unsure about the properties of their starspots and the origin of their magnetic dynamos.
Aylin García Soto, Elisabeth R. Newton, Stephanie T. Douglas, Abigail Burrows, Aurora Y. Kesseli   +4 more
doaj   +1 more source

The UKIDSS-2MASS Proper Motion Survey I: Ultracool dwarfs from UKIDSS DR4 [PDF]

, 2008
The UKIRT Infrared Deep Sky Survey (UKIDSS) is the first of a new generation of infrared surveys. Here we combine the data from two UKIDSS components, the Large Area Survey (LAS) and the Galactic Cluster Survey (GCS), with 2MASS data to produce an ...
Adelman-McCarthy, Ambartsumyan, Argelander, Baraffe, Barrado y Navascues, Bouvier, Bouy, Burgasser, Burgasser, Burgasser, Casali, Cossburn, Crifo, Cruz, Cruz, Cushing, Dahn, Deacon, Deacon, Delfosse, Delfosse, Emerson, Epchtein, Fan, Finch, Giclas, Gizis, Golimowski, Hambly, Hambly, Hambly, Hawley, Henry, Hewett, Hog, Kirkpatrick, Kirkpatrick, Kirkpatrick, Knapp, Lawrence, Leggett, Lepine, Lepine, Lepine, Liebert, Lodieu, Lodieu, Lodieu, Looper, Luyten, Luyten, M. J. McCaughrean, Metchev, N. C. Hambly, N. R. Deacon, Phan-Bao, Pinfield, Pokorny, R. R. King, Reid, Reid, Schneider, Skrutskie, Stauffer, Tinney, Tinney, Tinney, Tinney, van Altena, Vrba, Warren, Wilson   +71 more
core   +3 more sources

L-Band Photometry of L and T Dwarfs

, 2001
We present K- and L-band photometry obtained with the Keck I telescope for a representative sample of L and T dwarfs. These observations were motivated in part by the dominant role water and methane play in shaping the flux near 2 and 3 microns and by the potential use of these bands as indicators of spectral class in the infrared.
Stephens, D. C., Marley, M. S., Noll, K. S., Chanover, N.   +3 more
openaire   +2 more sources

News of Effective Temperatures of L Dwarfs [PDF]

Symposium - International Astronomical Union, 2003
In this work we report recent spectral analyses of L dwarfs and our success in measuring Teff and log(g). Using dust filled atmospheres for early L dwarfs and rained out atmospheres for late L dwarfs we could derive Teff of 1400 to 2000 K for L8 to M9.5 dwarfs respectively.
Andreas Schweitzer, John E. Gizis, France Allard, Peter H. Hauschildt   +3 more
openaire   +1 more source

Alzheimer's Disease Risk Factor APOE4 Exerts Dimorphic Effects on Female Bone

Advanced Science, EarlyView.
In aging bone, osteocytes accumulate neurodegenerative risk factor Apolipoprotein E (APOE). A humanized version of the Alzheimer's disease risk allele APOE4 altered the mouse bone transcriptome and proteome, with effects in female bone surpassing the brain, including bone fragility due to suppressed osteocytic maintenance of bone quality, identifying ...
Charles A. Schurman, Gurcharan Kaur, Serra Kaya, Joanna Bons, Carlos Galicia Aguirre, Qi Liu, Christina D. King, Kenneth A. Wilson, Harrison L. Baker, Mikayla Hady, Nadja Maldonado Luna, Gregor Bieri, Saul A. Villeda, Lisa M. Ellerby, Birgit Schilling, Tamara Alliston   +15 more
wiley   +1 more source

Discovery of the Remarkably Red L/T Transition Object VHS J183135.58-551355.9

The Astronomical Journal
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 near-infrared colors ( J − K _S = 3.633 ± 0.277 mag; J − W 2 = 6.249 ± 0.245 mag) from the VISTA ...
Thomas P. Bickle, Adam C. Schneider, Jonathan Gagné, Jacqueline K. Faherty, Austin Rothermich, Johanna M. Vos, Genaro Suárez, J. Davy Kirkpatrick, Aaron M. Meisner, Marc J. Kuchner, Adam J. Burgasser, Federico Marocco, Sarah L. Casewell, Dan Caselden, Daniella C. Bardalez Gagliuffi, The Backyard Worlds: Planet 9 Collaboration   +15 more
doaj   +1 more source

The extremely red L dwarf ULAS J222711-004547-dominated by dust [PDF]

, 2014
We report the discovery of a peculiar L dwarf from the United Kingdom Infrared Deep Sky Survey Large Area Survey, ULAS J222711-004547. The very red infrared photometry (MKO J-K = 2.79 +/- 0.06, WISEW1-W2 = 0.65 +/- 0.05) of ULAS J222711-004547 makes it ...
Burningham, B., Day-Jones, A. C., Gomes, J. I., Jones, H.R.A., Lucas, P.W., Marocco, F., Pinfield, D.J., Raddi, R., Smart, R.L., Smith, Leigh, Zhang, Z. H.   +10 more
core   +2 more sources

Kepler And L Dwarfs

, 2014
These are the slides shown.
openaire   +1 more source

Friend, Not Foe: Lowered Tissue Reactivity to Long‐Term Polyimide Implants

Advanced Science, EarlyView.
The choice of optimal neural probe designs remains a major challenge in the field of neurotechnology. This study investigated the biocompatibility of several probe variations, including material, thickness, width, and implantation strategy. It highlights the clear advantage of soft polyimide probes over stiff silicon probes for better device ...
Corinne Orlemann, Laura M. De Santis, Paul Neering, Christian Boehler, Kirti Sharma, Arno Aarts, Tobias Holzhammer, Rik J. J. van Daal, Patrick Ruther, Maria Asplund, Roxana N. Kooijmans, Pieter R. Roelfsema   +11 more
wiley   +1 more source