Zobrazeno 1 - 10
of 165
pro vyhledávání: '"HERBST, WILLIAM"'
Autor:
Herbst, William, Greenwood, James P.
Chondrules probably formed during a small window of time $\sim$1-4 Ma after CAIs, when most solid matter in the asteroid belt was already in the form of km-sized planetesimals. They are unlikely, therefore, to be ``building blocks" of planets or abun
Externí odkaz:
http://arxiv.org/abs/2402.12534
We use the known surface boulder-size distribution of the C-type rubble pile asteroid Ryugu (NEA 162173) to determine its macroporosity, assuming it is a homogeneous granular aggregate. We show that the volume-frequency distribution of its boulders,
Externí odkaz:
http://arxiv.org/abs/2104.06484
Autor:
Herbst, William, Greenwood, James P.
We propose that chondrules and chondrites formed together during a brief radiative heating event caused by the close encounter of a small (m to km-scale), primitive planetesimal (SPP) with incandescent lava on the surface of a large (100 km-scale) di
Externí odkaz:
http://arxiv.org/abs/1903.12224
We present VRIJHK photometry of the KH 15D T Tauri binary system for the 2015/16 and 2016/17 observing seasons. For the first time in the modern (CCD) era we are seeing Star B fully emerge from behind the trailing edge of the precessing circumbinary
Externí odkaz:
http://arxiv.org/abs/1711.11434
Autor:
Arulanantham, Nicole A., Herbst, William, Gilmore, Martha S., Cauley, P. Wilson, Leggett, S. K.
We report on Gemini/GNIRS observations of the binary T Tauri system V582 Mon (KH 15D) at three orbital phases. These spectra allow us to untangle five components of the system: the photosphere and magnetosphere of star B, the jet, scattering properti
Externí odkaz:
http://arxiv.org/abs/1611.09319
Autor:
Flaherty, Kevin M., DeMarchi, Lindsay, Muzerolle, James, Balog, Zoltan, Herbst, William, Megeath, S. Thomas, Furlan, Elise, Gutermuth, Robert
Infrared variability is common among young stellar objects, with surveys finding daily to weekly fluctuations of a few tenths of a magnitude. Space-based observations can produce highly sampled infrared light curves, but are often limited to total ba
Externí odkaz:
http://arxiv.org/abs/1609.09100
Autor:
Arulanantham, Nicole A., Herbst, William, Cody, Ann Marie, Stauffer, John R., Rebull, Luisa M., Agol, Eric, Windemuth, Diana, Marengo, Massimo, Winn, Joshua N., Hamilton, Catrina M., Mundt, Reinhard, Johns-Krull, Christopher M., Gutermuth, Robert A.
Publikováno v:
The Astronomical Journal, 151:90 (16 pp), 2016 April
We examine the light and color evolution of the T Tauri binary KH 15D through photometry obtained at wavelengths between 0.55 and 8.0 $\mu$m. The data were collected with ANDICAM on the 1.3 m SMARTS telescope at Cerro-Tololo Inter-American Observator
Externí odkaz:
http://arxiv.org/abs/1602.01877
Autor:
Stauffer, John, Cody, Ann Marie, Rebull, Luisa, Hillenbrand, Lynne A., Turner, Neal J., Carpenter, John, Carey, Sean, Terebey, Susan, Morales-Calderon, Maria, Alencar, Silvia H. P., McGinnis, Pauline, Sousa, Alana, Bouvier, Jerome, Venuti, Laura, Hartmann, Lee, Calvet, Nuria, Micela, Giusi, Flaccomio, Ettore, Song, Inseok, Gutermuth, Rob, Barrado, David, Vrba, Frederick J., Covey, Kevin, Herbst, William, Gillen, Edward, Guimaraes, Marcelo Medeiros, Bouy, Herve, Favata, Fabio
We provide CoRoT and Spitzer light curves, as well as broad-band multi-wavelength photometry and high resolution, multi- and single-epoch spectroscopy for 17 classical T Tauris in NGC 2264 whose CoRoT light curves (LCs) exemplify the "stochastic" LC
Externí odkaz:
http://arxiv.org/abs/1601.03326
Autor:
Messina, Sergio, Parihar, Padmakar, Biazzo, Katia, Lanza, Antonino F., Distefano, Elisa, Melo, Claudio H. F., Bradstreet, David, Herbst, William
We present the results of our analysis on V1481 Ori (JW 239), a young SB2 in the Orion Nebula Cluster with a circumbinary disc accreting on the lower-mass component. The analysis is based on high-resolution spectroscopic data and high-quality photome
Externí odkaz:
http://arxiv.org/abs/1512.08793
Autor:
Herbst, William, Greenwood, James P.
We propose that chondrules are formed by radiative heating of pre-existing dust clumps during close fly-bys of planetesimals with incandescent lava at their surfaces. We show that the required temperatures and cooling rates are easily achieved in thi
Externí odkaz:
http://arxiv.org/abs/1512.02064