Results 101 to 110 of about 46,048 (306)

THE MAGNETIC FIELD IMPACT ON ACCRETION RATE IN A PROTOPLANETARY DISK

Odessa Astronomical Publications, 2012
Recent observations are the evidence of a large-scale magnetic field in discs around classical T Tauri stars. A model of the axisymmetric thin protoplanetary disk in a global magnetic field is considered.
M. M. Kuksa
doaj   +1 more source

What Is Justice? Reflections on the Criminal Justice System in Brazil

The British Journal of Sociology, EarlyView.
ABSTRACT This essay explores the possibility of justice for the wretched of the earth. Using escrevivência (writing the experience/existence) and drawing on the theoretical insights and political praxis of the Assessoria Popular Maria Felipa (APMF, Maria Felipa Advocacy Group)—a Brazilian abolitionist organization led by Black activists—we analyze how ...
Fernanda Oliveira, Isabela Corby, Juliana Góes   +2 more
wiley   +1 more source

A Predicted Great Dimming of T Tauri: Has it Begun?

The Astronomical Journal
The optical star in the T Tauri triple system is the prototype of young Sun-like stars in our galaxy. This complex and dynamic system has evidence for misaligned disks and outflows, and molecular material in a circumbinary ring that obscures the southern
Tracy L. Beck
doaj   +1 more source

Ethical mediation: Navigating research ethics and frictions in overseas fieldwork

Area, EarlyView.
Short Abstract This paper problematises the application of UK‐based research ethics policy for overseas fieldwork. It draws on the fieldwork experiences of two researchers affiliated with UK universities and conducting fieldwork overseas in their home country.
Sandra Hiari, Maiss Razem
wiley   +1 more source

Faint disks around classical T Tauri stars: small but dense enough to form planets ⋆ [PDF]

, 2014
(abridged) Most Class II sources (of nearby star forming regions) are surrounded by disks with weak millimeter continuum emission. These "faint" disks may hold clues to the disk dissipation mechanism.
V. Pi'etu, S. Guilloteau, E. D. Folco, A. Dutrey, Y. Boehler   +4 more
semanticscholar   +1 more source

Pre-main sequence variable stars in young open cluster NGC 1893

, 2012
We present results of multi-epoch (fourteen nights during 2007-2010) $V$-band photometry of the cluster NGC 1893 region to identify photometric variable stars in the cluster. The study identified a total of 53 stars showing photometric variability.
A. K. Pandey, Appenzeller, Baraffe, Bessell, Bouvier, Bouvier, Breger, Carpenter, Chauhan, Chauhan, Cohen, Donati, Edwards, G. Maheswar, Gaze, Girardi, Grankin, Grankin, Haisch, Herbst, Herbst, Herbst, Hiltner, Kurtz, Lada, Landolt, Lata, Lenz, Littlefair, Littlefair, Lomb, Maheswar, Marco, Marco, Marconi, Massey, Meyer, Neelam Chauhan, Negueruela, Percy, Percy, Prisinzano, Robitaille, Scargle, Schaefer, Sharma, Siess, Sneh Lata, Stetson, Stetson, Vallenari, W. P. Chen, Zhang, Zwintz, Zwintz, Zwintz   +55 more
core   +1 more source

Starspots as an Explanation for the Mysterious IYJ Continuum Excess Emission in Classical T Tauri Stars

The Astrophysical Journal
An accurate estimation of the continuum excess emission from accretion spots and inner circumstellar disk regions is crucial for a proper derivation of fundamental stellar parameters in accreting systems.
Facundo Pérez Paolino, Jeffrey S. Bary, Lynne A. Hillenbrand, Madison Markham, William J. Fischer   +4 more
doaj   +1 more source

The Spectral Variability of the T Tauri Star DF Tauri [PDF]

The Astrophysical Journal, 1997
We analyze 117 echelle spectra of the T Tauri star DF Tau, concentrating on variations in the optical continuum veiling and the strong emission lines. Although this star was the inspiration for the original suggestion of magnetospheric accretion in T Tauri stars (TTSs), this hypothesis is only partially supported in our data. We find that variations in
Gibor Basri, Christopher M. Johns-Krull
openaire   +2 more sources

Which jet launching mechanism(s) in T Tauri stars [PDF]

, 2006
Aims. We examine whether ejection phenomena from accreting T Tauri stars can be described by only one type of self-collimated jet model. Methods. We present analytical kinematic predictions valid soon after the Alfven surface for all types of steady ...
J. Ferreira, C. Dougados, S. Cabrit
semanticscholar   +1 more source

Accretion-related properties of Herbig Ae/Be stars. Comparison with T Tauris [PDF]

, 2012
We look for trends relating the mass accretion rate (Macc) and the stellar ages (t), spectral energy distributions (SEDs), and disk masses (Mdisk) for a sample of 38 HAeBe stars, comparing them to analogous correlations found for classical T Tauri stars.
A. Mora, Acke, Acke, Acke, Acke, Acke, Alexander, Alibert, Alibert, Alonso Albi, Altenhoff, Andrews, André, B. Merín, B. Montesinos, Baines, Beckwith, Bertout, Bessell, Bigay, Blondel, Boss, Bowler, C. Eiroa, Caratti o Garatti, Carmona, Carmona, Casey, Cieza, Clarke, Close, Corporon, Coulson, Dodson-Robinson, Draine, Dullemond, Dullemond, Dullemond, Dullemond, Eiroa, Eiroa, Eisner, Fang, Fedele, Fuente, G. Meeus, Garcia Lopez, Glass, Gutermuth, Hartigan, Hartmann, Harvey, Herbst, Hernández, Hernández, Hillenbrand, Hubrig, I. Mendigutía, Isobe, Juhász, Kennedy, Kenyon, Kraus, Kurosawa, Lavalley, Leinert, Malfait, Mannings, Mannings, Mannings, Manoj, Martin-Zaïdi, McNally, Meeus, Meijer, Melnikov, Mendigutía, Mendigutía, Merín, Meyer, Monnier, Montesinos, Mora, Mottram, Muzerolle, Muzerolle, Najita, Natta, Natta, Natta, Oudmaijer, Panić, Patten, Pezzuto, Pirzkal, Piétu, Piétu, Pollack, Pollack, Pérez, R. D. Oudmaijer, Ricci, Robitaille, Robitaille, Roccatagliata, Rodgers, Royer, Salpeter, Sandell, Sandell, Sandell, Sheret, Shu, Sicilia-Aguilar, Siess, Smith, Stark, Sterzik, Sylvester, Sylvester, Takeuchi, Testi, Tetzlaff, Thi, Thi, Thomas, Thé, Tilling, van Boekel, van Boekel, van den Ancker, Vink, Walker, Waters, Weinberger, Wheelwright, Williams, Wolk, York   +138 more
core   +2 more sources