Zobrazeno 1 - 10
of 2 639
pro vyhledávání: '"Murphy S. J."'
Autor:
Holdsworth, D. L., Cunha, M. S., Lares-Martiz, M., Kurtz, D. W., Antoci, V., Forteza, S. Barceló, De Cat, P., Derekas, A., Kayhan, C., Ozuyar, D., Skarka, M., Hey, D. R., Shi, F., Bowman, D. M., Kobzar, O., Gómez, A. Ayala, Bognár, Zs., Buzasi, D. L., Ebadi, M., Fox-Machado, L., Hernández, A. García, Ghasemi, H., Guzik, J. A., Handberg, R., Handler, G., Hasanzadeh, A., Jayaraman, R., Khalack, V., Kochukhov, O., Lovekin, C. C., Mikołajczyk, P., Mkrtichian, D., Murphy, S. J., Niemczura, E., Olafsson, B. G., Pascual-Granado, J., Paunzen, E., Posiłek, N., Safari, A. Ramón-Ballesta H., Samadi-Ghadim, A., Smalley, B., Sódor, Á., Stateva, I., Suárez, J. C., Szabó, R., Wu, T., Ziaali, E., Zong, W., Seager, S.
We present the results of a systematic search of the Transiting Exoplanet Survey Satellite (TESS) 2-min cadence data for new rapidly oscillating Ap (roAp) stars observed during the Cycle 2 phase of its mission. We find seven new roAp stars previously
Externí odkaz:
http://arxiv.org/abs/2312.04199
Autor:
Roccatagliata, V., Sicilia-Aguilar, A., Kim, M., Campbell-White, J., Fang, M., Murphy, S. J., Wolf, S., Lawson, W. A., Henning, Th., Bouwman, J.
Nearby associations are ideal regions to study coeval samples of protoplanetary and debris disks down to late M-type stars. Those aged 5-10,Myrs, where most of the disk should have already dissipated forming planets, are of particular interest. We pr
Externí odkaz:
http://arxiv.org/abs/2310.02795
Autor:
Yong, D., Da Costa, G. S., Bessell, M. S., Chiti, A., Frebel, A., Gao, X., Lind, K., Mackey, A. D., Marino, A. F., Murphy, S. J., Nordlander, T., Asplund, M., Casey, A. R., Kobayashi, C., Norris, J. E., Schmidt, B. P.
We present chemical abundances for 21 elements (from Li to Eu) in 150 metal-poor Galactic stars spanning $-$4.1 $<$ [Fe/H] $<$ $-$2.1. The targets were selected from the SkyMapper survey and include 90 objects with [Fe/H] $\le$ $-$3 of which some 15
Externí odkaz:
http://arxiv.org/abs/2107.06430
Autor:
Yong, D., Kobayashi, C., Da Costa, G. S., Bessell, M. S., Chiti, A., Frebel, A., Lind, K., Mackey, A. D., Nordlander, T., Asplund, M., Casey, A. R., Marino, A. F., Murphy, S. J., Schmidt, B. P.
Neutron-star mergers were recently confirmed as sites of rapid-neutron-capture (r-process) nucleosynthesis. However, in Galactic chemical evolution models, neutron-star mergers alone cannot reproduce the observed element abundance patterns of extreme
Externí odkaz:
http://arxiv.org/abs/2107.03010
Autor:
Holdsworth, D. L., Cunha, M. S., Kurtz, D. W., Antoci, V., Hey, D. R., Bowman, D. M., Kobzar, O., Buzasi, D. L., Kochukhov, O., Niemczura, E., Ozuyar, D., Shi, F., Szabó, R., Samadi-Ghadim, A., Bognár, Zs., Fox-Machado, L., Khalack, V., Lares-Martiz, M., Lovekin, C. C., Mikołajczyk, P., Mkrtichian, D., Pascual-Granado, J., Paunzen, E., Richey-Yowell, T., Sódor, Á., Sikora, J., Yang, T. Z., Brunsden, E., David-Uraz, A., Derekas, A., Hernández, A. García, Guzik, J. A., Hatamkhani, N., Handberg, R., Lambert, T. S., Lampens, P., Murphy, S. J., Monier, R., Pollard, K. R., Quitral-Manosalva, P., Ramón-Ballesta, A., Smalley, B., Stateva, I., Vanderspek, R.
We present the results of a systematic search for new rapidly oscillating Ap (roAp) stars using the 2-min cadence data collected by the Transiting Exoplanet Survey Satellite (TESS) during its Cycle 1 observations. We identify 12 new roAp stars. Among
Externí odkaz:
http://arxiv.org/abs/2105.13274
Autor:
Bowman, D. M., Hermans, J., Daszyńska-Daszkiewicz, J., Holdsworth, D. L., Tkachenko, A., Murphy, S. J., Smalley, B., Kurtz, D. W.
Amongst the intermediate mass pulsating stars known as $\delta$ Sct stars is a subset of high-amplitude and predominantly radial-mode pulsators known as high-amplitude $\delta$ Sct (HADS) stars. From more than 2000 $\delta$ Sct stars observed by the
Externí odkaz:
http://arxiv.org/abs/2104.09279
Autor:
Jayasinghe, T., Stanek, K. Z., Thompson, Todd A., Kochanek, C. S., Rowan, D. M., Vallely, P. J., Strassmeier, K. G., Weber, M., Hinkle, J. T., Hambsch, F. -J., Martin, D., Prieto, J. L., Pessi, T., Huber, D., Auchettl, K., Lopez, L. A., Ilyin, I., Badenes, C., Howard, A. W., Isaacson, H., Murphy, S. J.
We report the discovery of the closest known black hole candidate as a binary companion to V723 Mon. V723 Mon is a nearby ($d\sim460\,\rm pc$), bright ($V\simeq8.3$~mag), evolved ($T_{\rm eff, giant}\simeq4440$~K, and $L_{\rm giant}\simeq173~L_\odot$
Externí odkaz:
http://arxiv.org/abs/2101.02212
Autor:
Cordoni, G., Da Costa, G. S., Yong, D., Mackey, A. D., Marino, A. F., Monty, S., Nordlander, T., Norris, J. E., Asplund, M., Bessell, M. S., Casey, A. R., Frebel, A., Lind, K., Murphy, S. J., Schmidt, B. P., Gao, X. D., Xylakis-Dornbusch, T., Amarsi, A. M., Milone, A. P.
In this work we combine spectroscopic information from the \textit{SkyMapper survey for Extremely Metal-Poor stars} and astrometry from Gaia DR2 to investigate the kinematics of a sample of 475 stars with a metallicity range of $ -6.5 \leq \rm [Fe/H]
Externí odkaz:
http://arxiv.org/abs/2011.01189
Autor:
Sekaran, S., Tkachenko, A., Abdul-Masih, M., Prsa, A., Johnston, C., Huber, D., Murphy, S. J., Banyard, G., Howard, A. W., Isaacson, H., Bowman, D. M., Aerts, C.
Publikováno v:
A&A 643, A162 (2020)
Eclipsing binary systems with components that pulsate in gravity modes ($g$ modes) allow for simultaneous and independent constraints of the chemical mixing profiles of stars. We aim to assemble a sample of $g$-mode pulsators in detached eclipsing bi
Externí odkaz:
http://arxiv.org/abs/2010.02187
We analyse TESS light curves for 70 southern $\lambda$ Boo stars to identify binaries and to determine which of them pulsate as $\delta$ Scuti stars. We find two heartbeat stars and two eclipsing binaries among the sample. We calculate that 81 percen
Externí odkaz:
http://arxiv.org/abs/2005.09187