Results 21 to 30 of about 3,384 (302)

A spectroscopic survey of Herbig Ae/Be stars with X-shooter - I. Stellar parameters and accretion rates [PDF]

, 2015
JRF gratefully acknowledges a studentship from the Science and Technology Facilities Council of the UK. JDI gratefully acknowledges funding from the European Union FP7-2011 under grant agreement no.
van den Ancker, M. E., Fairlamb, JR, Oudmaijer, R. D., Van den Ancker, ME, Ilee, JD, Mendigutía, I., Ilee, John David, Fairlamb, J. R., Oudmaijer, RD, Mendigutia, I   +9 more
core   +1 more source

Topics in Core-Collapse Supernova Theory: The Formation of Black Holes and the Transport of Neutrinos [PDF]

, 2012
Core-Collapse Supernovae are one of the most complex astrophysical systems in the universe. They deeply entwine aspects of physics and astrophysics that are rarely side by side in nature.
O'Connor, Evan Patrick
core   +1 more source

The Nature of Blue Stars with Mid-infrared Excesses in the Large Magellanic Cloud

The Astrophysical Journal Supplement Series, 2023
We present low-resolution optical spectra and classifications of 92 blue objects with mid-infrared excesses in the Large Magellanic Cloud. The majority of these objects were selected with the criteria of U − B < 0 and V < 17 from the potential young ...
Ryoko Ishioka, You-Hua Chu, Austin Edmister, Robert A. Gruendl, Lizhong Zhang, Ju Zhu   +5 more
doaj   +1 more source

A near-infrared interferometric survey of debris disc stars. III. First statistics based on 42 stars observed with CHARA/FLUOR [PDF]

, 2013
peer reviewedContext. Dust is expected to be ubiquitous in extrasolar planetary systems due to the dynamical activity of minor bodies. Inner dust populations are, however, still poorly known due to the high contrast and small angular separation with ...
Mérand, Antoine, Augereau, J. -C., Sturmann, Laszlo, Hanot, C., Monnier, J. D., E. Di Folco, Augereau, Jean-Charles, C. Hanot, J.-C. Augereau, McAlister, Harold, Mollier, Benjamin, Tuthill, Peter, Che, X., Tuthill, P. G., J. D. Monnier, Absil, O., Monnier, John, N. Turner, Kervella, Pierre, P. Kervella, Ertel, Steve, Sturmann, Judit, L. Sturmann, Absil, Olivier, Scott, Nicholas, Ertel, S., Defrère, D., Foresto, V. Coudé Du, V. Coudé du Foresto, Sturmann, L., ten Brummelaar, T. A., H. A. McAlister, Che, Xiao, ten Brummelaar, Theo, McAlister, H. A., Mérand, A., B. Mollier, D. Defrère, Scott, N., Thureau, N., Di Folco, E., P. G. Tuthill, Mollier, B., Coudé du Foresto, Vincent, Kervella, P., Turner, N., Brummelaar, T. A. Ten, A. Mérand, Turner, Nils, T. A. ten Brummelaar, Defrere, Denis, Scott, Nicholas William, N. Scott, Hanot, Charles, O. Absil, Coudé du Foresto, V., Thureau, Nathalie Danielle, N. Thureau, S. Ertel, X. Che, Di Folco, Emmanuel, Thureau, Nathalie, Sturmann, J., J. Sturmann   +63 more
core   +1 more source

Stellar spectral-type (mass) dependence of the dearth of close-in planets around fast-rotating stars

Astronomy & Astrophysics, 2023
In 2013 a dearth of close-in planets around fast-rotating host stars was found using statistical tests on Kepler data. The addition of more Kepler and Transiting Exoplanet Survey Satellite (TESS) systems in 2022 filled this region of the diagram of stellar rotation period ( P rot ) versus the planet orbital period ( P orb ).
García, R., Gourves, Clémence, Santos, A.R.G., Strugarek, A., Godoy-Rivera, D., Mathur, S., Delsanti, V., Breton, S.N., Beck, P.G., Brun, A.S., Mathis, S.   +10 more
openaire   +4 more sources

Evidence for Misalignment between Debris Disks and Their Host Stars

The Astrophysical Journal, 2023
We place lower limits on the obliquities between debris disks and their host stars for 31 systems by comparing their disk and stellar inclinations.
Spencer A. Hurt, Meredith A. MacGregor
doaj   +1 more source

Quantitative Stellar Spectral Classification. II. Early Type Stars

, 2002
The method developed by Stock and Stock (1999) for stars of spectral types A to K to derive absolute magnitudes and intrinsic colors from the equivalent widths of absorption lines in stellar spectra is extended to B-type stars. Spectra of this type of stars for which the Hipparcos Catalogue gives parallaxes with an error of less than 20% were observed ...
Stock, M. J., Stock, J., Garcia, J., Sanchez, N.   +3 more
openaire   +2 more sources

Stellar outflows with the NOT

, 2022
NOT has been an important telescope in studying galactic nebulae and stellar outflows since its inauguration more than 30 years ago. Superb observational capabilities provide simultaneous imaging and 2D spectral data, which is indispensable when ...
Djupvik, Amanda, Liimets, Tiina, Balick, Bruce, Santander-García, Miguel, Jones, David, Corradi, Romano, Kraus, Michaela   +6 more
core   +1 more source

A Census of the Stellar Populations in the Sco-Cen Complex

The Astronomical Journal, 2021
I have used high-precision photometry and astrometry from the early installment of the third data release of Gaia (EDR3) to perform a survey for members of the stellar populations within the Sco-Cen complex, which consist of Upper Sco, UCL/LCC, the V1062
K. L. Luhman
doaj   +1 more source

Stellar parameters of early-M dwarfs from ratios of spectral features at optical wavelengths [PDF]

, 2015
This work was supported by the Italian Ministry of Education, University, and Research through the Premiale HARPS-N research project under grant Ricerca di pianeti intorno a stelle di piccola massa. M.P. and I.R.
Southworth, J., SOZZETTI, Alessandro, BORSA, Francesco, BIGNAMINI, ANDREA, MICELA, Giuseppina, GRATTON, Raffaele, Stelzer, B., MAGGIO, Antonio, Shkolnik, E., DESIDERA, Silvano, Ribas, I., BIAZZO, Katia, AFFER, Laura, MALDONADO PRADO, Jesus, CLAUDI, Riccardo, Damasso, Mario, Perger, M., PRISINZANO, Loredana, LANZA, Antonino Francesco, Barbieri, M., PILLITTERI, Ignazio Francesco, Suárez Mascareño, A., Piotto, G., BEDIN, Luigi, Esposito, M., MOLINARI, Emilio Carlo, SCANDARIATO, GAETANO, González Hernández, J. I., PAGANO, Isabella, PORETTI, Ennio, Rebolo, R., COVINO, Elvira   +31 more
core   +1 more source