Results 91 to 100 of about 35,527 (304)

Using the Ca ii Lines in T Tauri Stars to Infer the Abundance of Refractory Elements in the Innermost Disk Region

The Astrophysical Journal
We present a study of the abundance of calcium in the innermost disk of 70 T Tauri stars in the star-forming regions of Chamaeleon I, Lupus, and Orion OB1b. We use calcium as a proxy for the refractory material that reaches the inner disk.
Marbely Micolta, Nuria Calvet, Thanawuth Thanathibodee, Gladis Magris C., Carlo F. Manara, Laura Venuti, Juan Manuel Alcalá, Gregory J. Herczeg   +7 more
doaj   +1 more source

Interferometric science results on young stellar objects

, 2009
Long-baseline interferometry at infrared wavelengths allows the innermost regions around young stars to be observed. These observations directly probe the location of the dust and gas in the disks.
Acke, Akeson, Akeson, Akeson, Akeson, Akeson, Berthoud, Boden, Boden, Casse, Colavita, Dullemond, Eisner, Eisner, Eisner, Eisner, Eisner, Eisner, Eisner, F. Malbet, Hartmann, Isella, Isella, Kraus, Kraus, Kraus, Lachaume, Lachaume, Leinert, Li Causi, Malbet, Malbet, Malbet, Millan-Gabet, Millan-Gabet, Millan-Gabet, Millan-Gabet, Monnier, Monnier, Monnier, Muzerolle, Natta, Preibisch, Quanz, Ratzka, Schegerer, Shu, Tannirkulam, Tannirkulam, Tatulli, Thi, Tuthill, van Boekel, Vinković, Vinković, Wilkin, Zhu, Ábrahám   +57 more
core   +1 more source

Accretion in Brown Dwarfs: an Infrared View [PDF]

, 2004
This paper presents a study of the accretion properties of 19 very low mass objects (Mstar .01-0.1 Msun) in the regions Chamaeleon I and rho-Oph For 8 objects we obtained high resolution Halpha profiles and determined mass accretion rate Macc and ...
A. Natta, Bacciotti, Baraffe, Bate, Bontemps, Comerón, Comerón, D'Antona, Edwards, F. Comerón, Fernández, Folha, Greene, Gullbring, Gómez, J. Muzerolle, Jayawardhana, Jayawardhana, Jayawardhana, Jörgens, L. Testi, Liu, Luhman, Muzerolle, Muzerolle, Muzerolle, Muzerolle, Muzerolle, Muzerolle, Natta, Natta, P. Persi, Rebull, S. Randich, Testi, Whelan, White, White, Wilking, Williams   +39 more
core   +1 more source

Microsphere Autolithography—A Scalable Approach for Arbitrary Patterning of Dielectric Spheres

Advanced Functional Materials, EarlyView.
MicroSphere Autolithography (µSAL) enables scalable fabrication of patchy particles with customizable surface motifs. Focusing light through dielectric microspheres creates well defined, tunable patches via a conformal poly(dopamine) photoresist. Nearly arbitrary surface patterns can be achieved, with the resolution set by the index contrast between ...
Elliott D. Kunkel, Alec G. Burnett, Katherine E. Scheiber, Hans D. Robinson   +3 more
wiley   +1 more source

Roll‐to‐Roll Mechanical Exfoliation for Large‐Area van der Waals Films with Preserved Crystallographic Alignment

Advanced Functional Materials, EarlyView.
A roll‐to‐roll exfoliation method is demonstrated that preserves the crystallographic alignment of anisotropic 2D materials over large areas, enabling scalable fabrication of directional electronic and optoelectronic devices. Abstract Anisotropic 2D materials such as black phosphorus (BP), GeS or CrSBr, exhibit direction‐dependent optical and ...
Esteban Zamora‐Amo, Francisco Fernandez‐Canizares, Yigit Sozen, Thomas Pucher, Pedro L Alcázar Ruano, Carmen Munuera, Ryo Ishikawa, Naoya Shibata, María Varela, Der‐Yuh Lin, Bing Wu, Jorge Quereda, Zdenek Sofer, Gabriel Sánchez‐Santolino, Andres Castellanos‐Gomez   +14 more
wiley   +1 more source

Bolometric Corrections for FU Ori Object Accretion Disk Luminosities

The Astrophysical Journal Letters
The accretion luminosity of an FU Ori disk is a fundamental system parameter, but a challenging one to estimate for all but the most well-studied systems.
Adolfo S. Carvalho, Lynne A. Hillenbrand
doaj   +1 more source

X-Shooter study of accretion in Chamaeleon I: II. A steeper increase of accretion with stellar mass for very low mass stars? [PDF]

, 2017
The dependence of the mass accretion rate on the stellar properties is a key constraint for star formation and disk evolution studies. Here we present a study of a sample of stars in the Chamaeleon I star forming region carried out using the VLT/X ...
Alcala, J. M., Antoniucci, S., Fedele, D., Henning, T., Herczeg, G. J., Manara, C. F., Mohanty, S., Mulders, G. D., Natta, A., Pascucci, I., Prusti, T., Rigliaco, E., Testi, L.   +12 more
core   +2 more sources

Stellar Growth by Disk Accretion: The Effect of Disk Irradiation on the Protostellar Evolution

The Astrophysical Journal, 2008
Young stars are expected to gain most of their mass by accretion from a disk that forms around them as a result of angular momentum conservation in the collapsing protostellar cloud. Accretion initially proceeds at high rates of 10^{-6}-10^{-5} M_Sun/yr resulting in strong irradiation of the stellar surface by the hot inner portion of the disk and ...
openaire   +2 more sources

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

X-Ray flares in Orion Young Stars. II. Flares, Magnetospheres, and Protoplanetary Disks

, 2008
We study the properties of powerful X-ray flares from 161 pre-main sequence (PMS) stars observed with the Chandra X-ray Observatory in the Orion Nebula region.
Alef W., Benz A. O., Birk G. T., Eric D. Feigelson, Franciosini E., Getman K. V., Getman K. V., Giusi Micela, Gordon P. Garmire, Gregory S. G., Hiei E., Imanishi K., Isobe H., Jardine M., Konstantin V. Getman, Lovelace R. V. E., Maggio A., Moira M. Jardine, Reale F., Scott G. Gregory, Siess L., Stelzer B.   +21 more
core   +1 more source