Zobrazeno 1 - 10
of 322
pro vyhledávání: '"STAUFFER, J. R."'
Autor:
Rebull, L. M., Stauffer, J. R., Hillenbrand, L. A., Cody, A. M., Kruse, Ethan, Powell, Brian P.
We present stellar rotation rates derived from Transiting Exoplanet Survey Satellite (TESS) light curves for stars in Upper Centaurus-Lupus (UCL; ~136 pc, ~16 Myr) and Lower Centaurus-Crux (LCC; ~115 pc, ~17 Myr). We find spot-modulated periods (P) f
Externí odkaz:
http://arxiv.org/abs/2205.13083
Autor:
Galindo-Guil, F. J., Barrado, D., Bouy, H., Olivares, J., Bayo, A., Morales-Calderón, M., Huélamo, N., Sarro, L. M., Rivière-Marichalar, P., Stoev, H., Montesinos, B., Stauffer, J. R.
Publikováno v:
A&A 664, A70 (2022)
Stellar ages are key to improving our understanding of different astrophysical phenomena. However, many techniques to estimate stellar ages are highly model-dependent. The lithium depletion boundary (LDB), based on the presence or absence of lithium
Externí odkaz:
http://arxiv.org/abs/2205.06354
Autor:
Stauffer, J. R., Rebull, L. M., Jardine, M., Cameron, A. Collier, Cody, A. M., Hillenbrand, L. A., Barrado, D., Kruse, E., Powell, B. P.
Using K2, we recently discovered a new type of periodic photometric variability while analysing the light curves of members of Upper Sco (Stauffer \etal\ 2017). The 23 exemplars of this new variability type are all mid-M dwarfs, with short rotation p
Externí odkaz:
http://arxiv.org/abs/2011.01839
Autor:
Rebull, L. M., Stauffer, J. R., Cody, A. M., Hillenbrand, L. A., Bouvier, J., Roggero, N., David, T. J.
We present an analysis of K2 light curves (LCs) from Campaigns 4 and 13 for members of the young ($\sim$3 Myr) Taurus association, in addition to an older ($\sim$30 Myr) population of stars that is largely in the foreground of the Taurus molecular cl
Externí odkaz:
http://arxiv.org/abs/2004.04236
Autor:
Flaccomio, E., Micela, G., Sciortino, S., Cody, A. M., Guarcello, M. G., Morales-Calderòn, M., Rebull, L., Stauffer, J. R.
Publikováno v:
A&A 620, A55 (2018)
Flares from the Sun and other stars are most prominently observed in the soft X-ray band. Most of the radiated energy, however, is released at optical/UV wavelengths. In spite of decades of investigation, the physics of flares is not fully understood
Externí odkaz:
http://arxiv.org/abs/1807.08525
Autor:
Barrado, D., de Gregorio-Monsalvo, I., Huélamo, N., Morales-Calderón, M., Bayo, A., Palau, A., Ruiz, M. T., Rivière-Marichalar, P., Bouy, H., Morata, O., Stauffer, J. R., Eiroa, C., Noriega-Crespo, A.
Publikováno v:
A&A 612, A79 (2018)
The early evolutionary stage of brown dwarfs are not very well characterized, specially during the embedded phase. To gain insight into the dominant formation mechanism of very low-mass objects and brown dwarfs, we conducted deep observations at 870$
Externí odkaz:
http://arxiv.org/abs/1712.06399
Autor:
Venuti, L., Prisinzano, L., Sacco, G. G., Flaccomio, E., Bonito, R., Damiani, F., Micela, G., Guarcello, M. G., Randich, S., Stauffer, J. R., Cody, A. M., Jeffries, R. D., Alencar, S. H. P., Alfaro, E. J., Lanzafame, A. C., Pancino, E., Bayo, A., Carraro, G., Costado, M. T., Frasca, A., Jofré, P., Morbidelli, L., Sousa, S. G., Zaggia, S.
Publikováno v:
A&A 609, A10 (2018)
We explore the structure and star formation history of the open cluster NGC 2264 (~3 Myr). We combined spectroscopic data from the Gaia-ESO Survey (GES) with multi-wavelength photometry from the Coordinated Synoptic Investigation of NGC 2264 (CSI 226
Externí odkaz:
http://arxiv.org/abs/1709.03178
Autor:
Rebull, L. M., Stauffer, J. R., Hillenbrand, L. A., Cody, A. M., Bouvier, J., Soderblom, D. R., Pinsonneault, M., Hebb, L.
We have Fourier analyzed 941 K2 light curves of likely members of Praesepe, measuring periods for 86% and increasing the number of rotation periods (P) by nearly a factor of four. The distribution of P vs. (V-K), a mass proxy, has three different reg
Externí odkaz:
http://arxiv.org/abs/1703.07031
Autor:
Venuti, L., Bouvier, J., Cody, A. M., Stauffer, J. R., Micela, G., Rebull, L. M., Alencar, S. H. P., Sousa, A. P., Hillenbrand, L. A., Flaccomio, E.
Publikováno v:
A&A 599, A23 (2017)
The low spin rates measured for solar-type stars at an age of a few Myr (~10% of the break-up velocity) indicate that some mechanism of angular momentum regulation must be at play in the early pre-main sequence. We characterize the rotation propertie
Externí odkaz:
http://arxiv.org/abs/1610.08811
Autor:
Stauffer, J. R., Marley, M. S., Gizis, J. E., Rebull, L. M., Carey, S. J., Krick, J., Ingalls, J. G., Lowrance, P., Glaccum, W., Kirkpatrick, J. D., Simon, A. A., Wong, M. H.
We have used the Spitzer Space Telescope in February 2016 to obtain high cadence, high signal-to-noise, 17-hour duration light curves of Neptune at 3.6 and 4.5 $\mu$m. The light curve duration was chosen to correspond to the rotation period of Neptun
Externí odkaz:
http://arxiv.org/abs/1608.07198