Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Wölk, S."'
X-rays emitted by the coronae of solar-type stars are a feature present in up to late-A types during the main sequence phase. F stars, either with or without hot Jupiters, are usually X-ray emitters. The very low level of X-ray emission of the F5 sta
Externí odkaz:
http://arxiv.org/abs/2304.00854
Autor:
Dunn, W., Berland, G., Roussos, E., Clark, G., Kollmann, P., Turner, D., Feldman, C., Stallard, T., Branduardi-Raymont, G., Woodfield, E. E., Rae, I. J., Ray, L. C., Carter, J. A., Lindsay, S. T., Yao, Z., Marshall, R., A., A. N. Jaynes, Ezoe, Y., Numazawa, M., Hospodarsky, G. B., Wu, X., Weigt, D. M., Jackman, C. M., Mori, K., Nénon, Q., Desai, R. T, Blum, L. W., Nordheim, T. A., Ness, J. U., Bodewits, D., Kimura, T., Li, W., Smith, H. T., Millas, D., Wibisono, A. D., Achilleos, N., Koutroumpa, D., McEntee, S. C., Collier, H., Bhardwaj, A., Martindale, A., Wolk, S. J., Badman, S. V., Kraft, R. P.
Jupiter's magnetosphere is considered to be the most powerful particle accelerator in the Solar System, accelerating electrons from eV to 70 MeV and ions to GeV energies. How electromagnetic processes drive energy and particle flows, producing and re
Externí odkaz:
http://arxiv.org/abs/2303.02161
Autor:
Pillitteri, I., Argiroffi, C., Maggio, A., Micela, G., Benatti, S., Reale, F., Colombo, S., Wolk, S. J.
Publikováno v:
A&A 666, A198 (2022)
Abridged. We observed the 40 Myr old star DS Tuc A with XMM-Newton and recorded two X-ray bright flares, with the second event occurring about 12 ks after the first one. Their duration from the rise to the end of the decay was of about 8-10 ks in sof
Externí odkaz:
http://arxiv.org/abs/2208.07415
Autor:
Lisse, C. M., Sitko, M. L., Wolk, S. J., Günther, H. M., Brittain, S., Green, J. D., Steckloff, J., Johnson, B., Espaillat, C. C., Koutoukali, M., Moorman, S. Y., Jackson, A. P.
We present 2007 - 2020 SpeX VISNIR spectral monitoring of the highly variable RW Aur A CTTS. We find direct evidence for a highly excited, IR bright, asymmetric, and time variable system. Comparison of the spectral and temporal trends found determine
Externí odkaz:
http://arxiv.org/abs/2201.10465
Autor:
Benatti, S., Damasso, M., Borsa, F., Locci, D., Pillitteri, I., Desidera, S., Maggio, A., Micela, G., Wolk, S., Claudi, R., Malavolta, L., Modirrousta-Galian, D.
Publikováno v:
A&A 650, A66 (2021)
We performed a radial velocity (RV) monitoring of the 40 Myr old star DS Tuc A with HARPS at the ESO-3.6m to determine the planetary mass of its 8.14-days planet, first revealed by TESS. We also observed two planetary transits with HARPS and ESPRESSO
Externí odkaz:
http://arxiv.org/abs/2103.12922
Autor:
Lisse, C. M., Meng, H. Y. A., Sitko, M. L., Morlok, A., Johnson, B. C., Jackson, A. P., Vervack Jr., R. J., Chen, C. H., Wolk, S. J., Lucas, M. D., Marengo, M., Britt, D. T.
We report here time domain infrared spectroscopy and optical photometry of the HD145263 silica-rich circumstellar disk system taken from 2003 through 2014. We find an F4V host star surrounded by a stable, massive 1e22 - 1e23 kg (M_Moon to M_Mars) dus
Externí odkaz:
http://arxiv.org/abs/2003.06870
Autor:
Fabbiano, G., Elvis, M., Accomazzi, A., Berriman, G. B., Brickhouse, N., Bose, S., Carrera, D., Chilingarian, I., Civano, F., Czerny, B., D'Abrusco, R., Diemer, B., Drake, J., Meibody, R. Emami, Farah, J. R., Fazio, G. G., Feigelson, E., Fornasini, F., Gallagher, Jay, Grindlay, J., Hernquist, L., James, D. J., Karovska, M., Kashyap, V., Kim, D. -W., Lacy, G. M., Lazio, J., Lusso, E., Maksym, W. P., Galarza, R. Martinez, Mazzarella, J., Ntampaka, M., Risaliti, G., Sanders, D., Scoville, N., Shapiro, I., Siemiginowska, A., Smth, A., Smith, S., Szentgyorgyi, A., Tacchella, S., Thakar, A., Tolls, V., Vrtilek, S., Wilkes, B., Wilner, D., Willner, S. P., Wolk, S. J., Zhao, J. -H.
We write in response to the call from the 2020 Decadal Survey to submit white papers illustrating the most pressing scientific questions in astrophysics for the coming decade. We propose exploration as the central question for the Decadal Committee's
Externí odkaz:
http://arxiv.org/abs/1903.06634
Stars with convective envelopes display magnetic activity, which decreases over time due to the magnetic braking of the star. This age-dependence of magnetic activity is well-studied for younger stars, but the nature of this dependence for older star
Externí odkaz:
http://arxiv.org/abs/1706.08979
Autor:
Lisse, C. M., McNutt, Jr., R. L., Wolk, S. J., Bagenal, F., Stern, S. A., Gladstone, G. R., Cravens, T. E., Hill, M. E., Kollmann, P., Weaver, H. A., Strobel, D. F., Elliott, H. A., McComas, D. J., Binzel, R. P., Snios, B. T., Bhardwaj, A., Chutjian, A., Young, L. A., Olkin, C. B., Ennico, K. A.
Using Chandra ACIS-S, we have obtained imaging Xray spectrophotometry of the Pluto system in support of the New Horizons flyby on 14 July 2015. 174 ksec of observations were obtained on 4 visits in Feb 2014 to Aug 2015. We measured a net signal of 6.
Externí odkaz:
http://arxiv.org/abs/1610.07963
Autor:
Poppenhaeger, K., Wolk, S. J.
The magnetic activity of planet-hosting stars is an important factor to estimate the atmospheric stability of close-in exoplanets and the age of their host stars. It has long been speculated that close-in exoplanets can influence the stellar activity
Externí odkaz:
http://arxiv.org/abs/1404.1073