Results 31 to 40 of about 3,957,653 (321)

Theoretical Predictions of Surface Light Element Abundances in Protostellar and Pre-Main Sequence Phase

Frontiers in Astronomy and Space Sciences, 2021
Theoretical prediction of surface stellar abundances of light elements–lithium, beryllium, and boron–represents one of the most interesting open problems in astrophysics.
E. Tognelli, E. Tognelli, S. Degl’Innocenti, S. Degl’Innocenti, P. G. Prada Moroni, P. G. Prada Moroni, L. Lamia, L. Lamia, L. Lamia, R. G. Pizzone, A. Tumino, A. Tumino, C. Spitaleri, C. Spitaleri, A. Chiavassa   +14 more
doaj   +1 more source

The main sequence of three red supergiant clusters [PDF]

, 2013
Massive clusters in our Galaxy are an ideal testbed to investigate the properties and evolution of high-mass stars. They provide statistically significant samples of massive stars of uniform ages. To accurately determine the intrinsic physical properties
Alexander, Alexander Scholz, Bonatto, Bonatto, Buckner, Clark, Clark, Davies, Davies, Davies, Dirk Froebrich, Figer, Froebrich, Froebrich, Gvaramadze, Indebetouw, Lawrence, Lejeune, Lucas, Marco, Mathis, Negueruela, Negueruela, Oey, Ortolani, Piatti, Rahman, Rieke, Scandariato, Siess, Skrutskie, Stead, Stephenson, Stetson, Westerlund   +34 more
core   +3 more sources

Hydrodynamics and Survivability during Post-main-sequence Planetary Engulfment

The Astrophysical Journal, 2023
The engulfment of substellar bodies (SBs), such as brown dwarfs and planets, by giant stars is a possible explanation for rapidly rotating giants, lithium-rich giants, and the presence of SBs in close orbits around subdwarfs and white dwarfs.
Ricardo Yarza, Naela B. Razo-López, Ariadna Murguia-Berthier, Rosa Wallace Everson, Andrea Antoni, Morgan MacLeod, Melinda Soares-Furtado, Dongwook Lee, Enrico Ramirez-Ruiz   +8 more
doaj   +1 more source

The Zero Age Main Sequence of WIMP burners [PDF]

, 2007
We modify a stellar structure code to estimate the effect upon the main sequence of the accretion of weakly interacting dark matter onto stars and its subsequent annihilation. The effect upon the stars depends upon whether the energy generation rate from
A. Bouquet, C. J. Hansen, J. Angle, Joakim Edsjö, K. Griest, Malcolm Fairbairn, O. R. Pols, P. Scott, P. P. Eggleton, P. P. Eggleton, Pat Scott   +10 more
core   +2 more sources

The Instability Strip for Pre--Main-Sequence Stars [PDF]

, 1998
We investigate the pulsational properties of Pre--Main-Sequence (PMS) stars by means of linear and nonlinear calculations. The equilibrium models were taken from models evolved from the protostellar birthline to the ZAMS for masses in the range 1 to 4 ...
Baade D., Breger M., Catala C., Francesco Palla, Gahm G. F., Grinin V. P., Kurtz D. W., Marcella Marconi, van den Ancker M. E., van den Ancker M. E.   +9 more
core   +3 more sources

On the Statistical Properties of the Lower Main Sequence [PDF]

The Astrophysical Journal, 2017
Abstract Astronomy is in an era where all-sky surveys are mapping the Galaxy. The plethora of photometric, spectroscopic, asteroseismic, and astrometric data allows us to characterize the comprising stars in detail. Here we quantify to what extent precise stellar observations reveal information about the properties of a star, including ...
Sarbani Basu, George C. Angelou, George C. Angelou, Saskia Hekker, Saskia Hekker, Earl P. Bellinger   +5 more
openaire   +5 more sources

A Study of ISO Spectra for Herbig Ae/Be Stars [PDF]

Journal of Astronomy and Space Sciences, 2002
We present the infrared spectra of Herbig Ae/Be stars including the Infrared Space Observatory (ISO) data. To investigate the overall properties of their circumstellar dust envelope and/or disk, we combine the IR spectra with photometric data ranging ...
Kyung-Won Suh, Mi-Ryang Kim, Ji-Hye Baek
doaj   +1 more source

A new deepening of mass-radius empirical relation for main sequence stars

Emergent Scientist
In the following paper I have compared some typical mass-radius relations for main sequence stars by studying their level of agreement with DEBCat (J. Southworth, ASP Conf. Ser.
Camposeo Salvatore
doaj   +1 more source

The ALMaQUEST Survey: The Molecular Gas Main Sequence and the Origin of the Star-forming Main Sequence [PDF]

The Astrophysical Journal Letters, 2019
Abstract The origin of the star-forming main sequence (SFMS; i.e., the relation between star formation rate and stellar mass, globally or on kpc scales) remains a hotly debated topic in galaxy evolution. Using the ALMA-MaNGA QUEnching and STar formation (ALMaQUEST) survey, we show that for star-forming spaxels in the main-sequence ...
Lin, L, Pan, HA, Ellison, SL, Belfiore, F, Shi, Y, Sánchez, SF, Hsieh, BC, Rowlands, K, Ramya, S, Thorp, MD, Li, C, Maiolino, R   +11 more
openaire   +5 more sources

Pre-main-sequence isochrones -- I. The Pleiades benchmark [PDF]

, 2012
We present a critical assessment of commonly used pre-main-sequence isochrones by comparing their predictions to a set of well-calibrated colour-magnitude diagrams of the Pleiades in the wavelength range 0.4 to 2.5 microns.
Allard, Allard, Allard, Allen, Alvarez, Andersen, Asplund, Baraffe, Baraffe, Barber, Barrado y Navascués, Bessell, Bessell, Bessell, Bessell, Brott, Burningham, Burningham, Böhm-Vitense, Cameron P. M. Bell, Cardelli, Castelli, Cavadore, Clausen, Clausen, Clement, Clement, Cohen, D'Antona, Dahm, Delfosse, Doi, Dotter, Freytag, Fukugita, Girardi, Grevesse, Hartmann, Hartmann, Hillenbrand, Jeffries, Jeffries, Jeffries, King, Kraus, Kurucz, Kurucz, Lacy, Lacy, Leggett, Leggett, Lodieu, Ludwig, Lutz, López-Morales, Martín, Mayne, Mayne, N. J. Mayne, Naylor, Naylor, Naylor, Oke, Partridge, Perryman, Pickles, Popper, Popper, Popper, R. D. Jeffries, S. P. Littlefair, Schwenke, Shahbaz, Siess, Soderblom, Stauffer, Stauffer, Ségransan, Tim Naylor, Tognelli, Torres, Torres, van Altena, Verbeek   +83 more
core   +2 more sources