... been performed for three mercury–manganese stars, 53 Tauri, Mu Leporis, and Kappa Cancri. These fine analyses show ...
Tópico(s): Solar and Space Plasma Dynamics
1987 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
... 12C/13C ratio in stellar atmospheres. III. Alpha Tauri, Beta Geminorum, and Mu Leonis. Tomkin, J. ; Lambert, D. L. Abstract High- ...
Tópico(s): Atmospheric Ozone and Climate
1974 - IOP Publishing | The Astrophysical Journal
E. S. Jackson, W. W. Shane, B. T. Lynds,
Tópico(s): Stellar, planetary, and galactic studies
1957 - IOP Publishing | The Astrophysical Journal
Arthur D. Bosman, Simon Bruderer, E. F. van Dishoeck,
... a two-dimensional disk model representative of T-Tauri disks. The CO2 gas that emits in the 15 $\mu$m and 4.5 $\mu$m regions of ...
Tópico(s): Atmospheric Ozone and Climate
2017 - EDP Sciences | Astronomy and Astrophysics
... Herbig Ae/Be stars and $\lesssim 0.01 \,\, \mu {\mathrm{m}}$ for T Tauri stars). We further investigate how larger grains, up ...
Tópico(s): Stellar, planetary, and galactic studies
2020 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Simon Bruderer, D. Harsono, E. F. van Dishoeck,
... formation. We ran models tailored to the T Tauri disk AS 205 (N) where HCN lines in both the 3 {\mu}m and 14 {\mu}m bands have been ...
Tópico(s): Stellar, planetary, and galactic studies
2014 - EDP Sciences | Astronomy and Astrophysics
David Branch, J. Bonnell, J. Tomkin,
... J. Abstract High-resolution near-infrared spectra of Mu Leonis, Alpha Arietis, Epsilon Virginis, and Delta Tauri, published equivalent widths for Alpha Bootis and the sun, and a grid of flux-constant model atmospheres have been used to derive iron-to-hydrogen ratios. The results for the super-metal-rich prototype Mu Leo are in better agreement with photometric determinations ...
Tópico(s): Astrophysics and Star Formation Studies
1978 - IOP Publishing | The Astrophysical Journal
T. T. Ke, Heqing Huang, D. N. C. Lin,
... of irradiation from their host stars. Around T Tauri stars, most mid-infrared (MIR) radiation (in a few to a few ten {\mu}m wavelength range) emerge from regions around a ...
Tópico(s): Stellar, planetary, and galactic studies
2011 - IOP Publishing | The Astrophysical Journal
Nicole Arulanantham, W. Herbst, Ann Marie Cody, J. R. Stauffer, L. M. Rebull, Eric Agol, Diana Windemuth, M. Marengo, Joshua N. Winn, Catrina M. Hamilton, R. Mundt, Christopher M. Johns–Krull, R. A. Gutermuth,
... 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 ...
Tópico(s): Astro and Planetary Science
2016 - Institute of Physics | The Astronomical Journal
R. Abuter, M. Accardo, A. Amorim, Narsireddy Anugu, G. Ávila, N. Azouaoui, M. Benisty, Jean-Philippe Berger, Nicolas Blind, H. Bonnet, P. Bourget, W. Brandner, R. Brast, A. Buron, L. Burtscher, F. Cassaing, F. Chapron, Élodie Choquet, Y. Clénet, C. Collin, V. Coudé du Foresto, W. J. de Wit, P. T. de Zeeuw, C. Deen, F. Delplancke-Ströbele, R. Dembet, F. Dérie, Jason Dexter, G. Duvert, M. Ebert, A. Eckart, F. Eisenhauer, Michael Esselborn, P. Fédou, Gert Finger, P. García, C. E. García Dabó, R. García López, É. Gendron, R. Genzel, S. Gillessen, Frédéric Gonté, Paulo Gordo, Marion Grould, U. Grözinger, Sylvain Guieu, Pierre Haguenauer, O. Hans, X. Haubois, M. Haug, F. Haußmann, Th. Henning, S. Hippler, M. Horrobin, A. Huber, Z. Hubert, N. Hubin, C. A. Hummel, Gerd Jakob, A. Janssen, L. Jochum, L. Jocou, A. Kaufer, S. Kellner, Sarah Kendrew, L. Kern, P. Kervella, M. Kiekebusch, R. Klein, Y. Kok, Johann Kolb, M. Kulas, S. Lacour, V. Lapeyrère, B. Lazareff, J.-B. Le Bouquin, P. Léna, R. Lenzen, Samuel Lévêque, M. Lippa, Y. Magnard, Leander Mehrgan, M. Mellein, A. Mérand, Javier Moreno-Ventas, T. Moulin, E. Müller, F. H. Müller, Udo Neumann, Sylvain Oberti, T. Ott, Laurent Pallanca, J. Panduro, L. Pasquini, T. Paumard, I. Percheron, K. Perraut, G. Perrin, A. Pflüger, O. Pfuhl, T. Phan Duc, P. M. Plewa, Dan Popovic, S. Rabien, Andrés Ramírez, J. Ramos, Christian Rau, M. Riquelme, Ralf-Rainer Rohloff, Gérard Rousset, J. Sánchez-Bermúdez, S. Scheithauer, M. Schöller, Nicolas Schuhler, J. Spyromilio, C. Straubmeier, E. Sturm, M. Suárez, K. R. W. Tristram, N. Ventura, F. Vincent, Idel Waisberg, I. Wank, Johannes Weber, E. Wieprecht, Michael Wiest, E. Wiezorrek, M. Wittkowski, J. Woillez, B. Wolff, Ş. Yazıcı, D. Ziegler, G. Zins,
... Active Galactic Nucleus of PDS 456 for few {\mu}as spectro-differential astrometry, the T Tauri star S CrA for a spectro-differential visibility ...
Tópico(s): Advanced X-ray Imaging Techniques
2017 - EDP Sciences | Astronomy and Astrophysics
Yoichi Itoh, Koji Sugitani, Katsuo Ogura, Motohide Tamura,
... emission of molecular hydrogen from a classical T Tauri star, LkH$\alpha$ 264 in the $v= 1 \hbox{--} 0$ S(1) line at 2.122$\, {\mu \mathrm {m}}$. The line velocity is coincident with ...
Tópico(s): Atomic and Molecular Physics
2003 - Oxford University Press | Publications of the Astronomical Society of Japan
Hao Yang, Christopher M. Johns–Krull,
... infrared K-band echelle spectra of 14 T Tauri stars in the Orion Nebula Cluster. We model Zeeman broadening in three magnetically sensitive \ion{Ti}{1} lines near $2.2\ \mu$m and consistently detect kilogauss-level magnetic fields in the stellar photospheres. The data are consistent in each case with the entire stellar surface being covered with magnetic fields, suggesting that magnetic pressure likely dominates over gas pressure in the photospheres of these stars. These very strong magnetic fields might themselves be responsible for the underproduction of X-ray emission of T Tauri stars relative to what is expected based on ...
Tópico(s): Astro and Planetary Science
2011 - IOP Publishing | The Astrophysical Journal
P.-G. Valegård, L. B. F. M. Waters, C. Dominik,
... an optically selected sample of intermediate mass T-Tauri stars (IMTT stars) here defined as stars of masses $1.5 M_{\odot}\leq M_* \leq 5 M_{\odot}$ and spectral type between F and K3, from literature. We use literature optical photometry (0.4-1.25$\mu$m) and distances determined from Gaia DR2 parallax ... Siess evolutionary tracks we identify intermediate mass T-Tauri stars from literature and derive masses and ages. We use Spitzer spectra to classify the disks around the stars into Meeus Group I and Group II disks based on their [F$_{30}$/F$_{13.5}$] spectral index. We also examine the 10$\mu$m silicate dust grain emission and identify emission ...
Tópico(s): Astro and Planetary Science
2021 - EDP Sciences | Astronomy and Astrophysics
Karina Maucó, Jesús Hernández, Nuria Calvet, Javier Ballesteros‐Paredes, César Briceño, M. K. McClure, Paola D’Alessio, Kassandra R. Anderson, B. Ali,
... present new Herschel PACS observations of 32 T Tauri stars in the young ($\sim$3 Myr) $\sigma$ Ori cluster. Most of our objects are K & M stars with large excesses at 24 $\mu$m. We used irradiated accretion disk models of ...
Tópico(s): Solid-state spectroscopy and crystallography
2016 - IOP Publishing | The Astrophysical Journal
R. Franz, Barbara Ercolano, Simón Casassus, Giovanni Picogna, T. Birnstiel, Sebastián Pérez, Christian Rab, Amit Sharma,
... winds acting on protoplanetary disks around young T-Tauri stars may crucially impact disk evolution, affecting both gas and dust distributions. We constrain the dust densities in a typical XEUV-driven outflow, and determine whether these winds can be observed at $\mu\mathrm{m}$-wavelengths in scattered and polarised light. For an XEUV-driven outflow around a $M_* = 0.7\,\mathrm{M}_\odot$ T-Tauri star with $L_X = 2 \cdot 10^{30}\,\ ...
Tópico(s): Astro and Planetary Science
2021 - EDP Sciences | Astronomy and Astrophysics
Andrea Banzatti, Michael R. Meyer, C. F. Manara, K. M. Pontoppidan, L. Testi,
... is affected by variable accretion luminosity in T Tauri stars. We monitored a young highly variable solar-mass star, DR Tau, using simultaneously two high/medium-resolution ESO-VLT spectrographs: VISIR at 12.4 $\mu$m to observe water lines from the disk, ...
Tópico(s): Molecular Spectroscopy and Structure
2013 - IOP Publishing | The Astrophysical Journal
Dan Li, C. M. Telesco, Han Zhang, Christopher M. Wright, É. Pantin, Peter J. Barnes, C. Packham,
... at 8.7, 10.3, and 12.5 $\mu$m from discs around eight Herbig Ae/Be stars and one T-Tauri star. We analyzed polarimetric properties of each object ...
Tópico(s): Astrophysical Phenomena and Observations
2017 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Jens Kammerer, M. Kasper, Michael Ireland, R. Köhler, Romain Laugier, Frantz Martinache, R. Siebenmorgen, M. E. van den Ancker, R. van Boekel, Tom Herbst, E. Pantin, H. U. Käufl, D. J. M. Petit dit de la Roche, V. D. Ivanov,
... brightness of all three components of the T Tauri system (T Tau N, T Tau Sa, T Tau Sb) in the mid-infrared in order to obtain photometry around the $\sim 9.7~\mu m$ silicate feature. This allows us to study their variability and to investigate the distribution of dust and the geometry of circumstellar and circumbinary disks in this complex system. We observe T Tauri with the VLT/VISIR-NEAR instrument. With kernel ...
Tópico(s): Astro and Planetary Science
2020 - EDP Sciences | Astronomy and Astrophysics
... far infra-red (FIR) polarization of the $850{\mu}m$ continuum emission from T Tauri disks has been detected. The observed degree of ... of dust grains by radiative torque in T Tauri disks and provide predictions for polarized emission for disks viewed at different wavelengths and viewing angles. In the presence of magnetic field, these aligned grains produce polarized emission in infrared wavelengths. When we take a Mathis-Rumpl-Nordsieck-type distribution with maximum grain size of $500-1000{\mu}m$ , the degree of polarization is around 2- ...
Tópico(s): Astro and Planetary Science
2007 - Korean Astronomical Society | Journal of The Korean Astronomical Society
A. Evans, M. F. Bode, D. C. B. Whittet, J. K. Davies, D. Kilkenny, D. Baines,
... and infrared broadband photometry |$(0.35\,\leqslant\,\lambda (\mu \text{m})\,\leqslant\,3.5)$| and Hβ index photometry have been obtained for the T Tauri star RY Lupi. Our results favour a model ...
Tópico(s): Astrophysics and Star Formation Studies
1982 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Gautam Saikia, Rupjyoti Gogoi, Ranjan Gupta, D. B. Vaidya,
... surrounding two Herbig Be stars and one T-Tauri star with particular emphasis towards the 10 |$\mu$|m silicate feature using CanariCam mounted over the ...
Tópico(s): Astro and Planetary Science
2019 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Hiroshi Maeshima, Takao Nakagawa, Takuya Kojima, Yasuo Doi, Jungmi Kwon,
... the WISE 12, 22, and the AKARI 90 $\mu$m survey images of known T Tauri stars and derived the average fluxes, well below the survey flux limit in the 90 $\mu$m band. We classified 4,783 T Tauri stars into three age groups, which are young ($<$2 Myr), mid-age (2-6 Myr), and old ($>$6 Myr) groups, and stacked the WISE 12 and 22 and the AKARI 90 $\mu$m images in each group. The photometry of ...
Tópico(s): Astro and Planetary Science
2021 - Oxford University Press | Publications of the Astronomical Society of Japan
Karina Maucó, César Briceño, Nuria Calvet, Jesús Hernández, Javier Ballesteros‐Paredes, Omaira González, Catherine Espaillat, Dan Li, C. M. Telesco, Juan José Downes, Enrique Macías, Chunhua Qi, R. Michel, Paola D’Alessio, B. Ali,
... emph{Herschel} PACS observations of 8 Classical T Tauri Stars in the $\sim 7-10$ Myr old OB1a and the $\sim 4-5$ Myr old OB1b Orion sub-asscociations. Detailed modeling of the broadband spectral energy distributions, particularly the strong silicate emission at 10 $\mu$m, shows that these objects are (pre)transitional ...
Tópico(s): Stellar, planetary, and galactic studies
2018 - IOP Publishing | The Astrophysical Journal
E. Koumpia, W. J. de Wit, R. D. Oudmaijer, A. J. Frost, S. L. Lumsden, A. Caratti o Garatti, S. P. Goodwin, B. Stecklum, I. Mendigutía, John D. Ilee, Miguel Vioque,
... inner sizes of MYSOs, Herbig AeBe and T Tauri stars appear to follow a universal trend at which the sizes scale with the square-root of the stellar luminosity. The Brgamma emission originates from somewhat smaller and co-planar area compared to the 2.2 {\mu}m continuum emission. We discuss this new finding ...
Tópico(s): Molecular Spectroscopy and Structure
2021 - EDP Sciences | Astronomy and Astrophysics
Produção Nacional
Revisado por pares
Geoffrey C. Bower, Laurent Loinard, Sergio A. Dzib, P. A. B. Galli, Gisela N. Ortiz-León, C. Moutou, J.‐F. Donati,
... of variable radio emission associated with the T Tauri star, V830 Tau, which was recently shown to host a hot Jupiter companion. Very Large Array observations at a frequency of 6 GHz reveal a detection on 01 May 2011 with a flux density $919 \pm 26\ \mu$Jy, along with non-detections in two other ...
Tópico(s): Gamma-ray bursts and supernovae
2016 - IOP Publishing | The Astrophysical Journal
Evan Haze Nuñez, Matthew S. Povich, Breanna A. Binder, Leisa K. Townsley, Patrick S. Broos,
... age main sequence (AB), and lower-mass T Tauri stars (TTS). We divide our sources among these three sub-classifications and further identify disk-bearing young stellar objects versus diskless sources with no detectable infrared (IR) excess emission using IR (1--8 $\mu$m) spectral energy distribution modeling. We then perform ...
Tópico(s): Astro and Planetary Science
2021 - Institute of Physics | The Astronomical Journal
Andrea Isella, M. Benisty, Richard Teague, Jaehan Bae, M. Keppler, Stefano Facchini, Laura M. Pérez,
... source of sub-millimeter continuum emission ($\lambda=855$ $\mu$m) associated with a young planet, PDS 70 c, recently detected in H$\alpha$ emission around the 5 Myr old T Tauri star PDS 70. We interpret the emission as ...
Tópico(s): Astro and Planetary Science
2019 - IOP Publishing | The Astrophysical Journal Letters
Ray S. Furuya, Hiroko Shinnaga, Kouichiro Nakanishi, Munetake Momose, Masao Saito,
... emission and near-infrared $K$-band (2.2$\, {\mu \mathrm {m}}$) imaging of a flare event in 2003 January that occurred on the young stellar object GMR-A, which is suggested to be a weak-line T Tauri star in the Orion cluster. Our mm data ...
Tópico(s): Astro and Planetary Science
2003 - Oxford University Press | Publications of the Astronomical Society of Japan
Á. Kóspál, P. Ábrahám, A. Carmona, L. Chen, Joel D. Green, R. van Boekel, Jacob Aaron White,
... its way to become a disk-only T Tauri star. We used VLT/VISIR to obtain the first spectra that cover the 8-13 $\mu$m mid-infrared wavelength range in low-resolution ... Four objects from our sample show the 10 $\mu$m silicate feature in emission. We study the shape and strength of the silicate feature in these objects and find that they mostly contain large amorphous grains, suggesting that large grains are typically not settled to the midplane in FUor disks. This is a general characteristic of FUors, as opposed to regular T Tauri-type stars whose disks display anything from pristine ...
Tópico(s): Stellar, planetary, and galactic studies
2020 - IOP Publishing | The Astrophysical Journal Letters
... 7, 8.6, 11.3, and 12.7 $\mu$m, is often detected in protoplanetary disks (PPDs). These features are commonly attributed to polycyclic aromatic hydrocarbons (PAHs). We model these emission features in the infrared spectra of 69 PPDs around 14 T Tauri and 55 Herbig Ae/Be stars in terms ...
Tópico(s): Stellar, planetary, and galactic studies
2017 - IOP Publishing | The Astrophysical Journal