Zobrazeno 1 - 10
of 95
pro vyhledávání: '"Huenemoerder D. P."'
Autor:
Bozzo, E., Huenemoerder, D. P., Falanga, M., Paltani, S., Costantini, E., de Plaa, J., Gu, L.
Stellar coronal sources have been observed in the past not only for their astrophysical interest in the field of binary system evolution and interaction, but also for their invaluable roles as benchmarks for plasma spectral models and as calibration
Externí odkaz:
http://arxiv.org/abs/2401.13290
Capella is the brightest chromospherically active binary in the sky, hosting a cooler G8III giant (Aa) and an hotter G1III companion (Ab). The source has been extensively observed in the X-rays in the past decades not only for its astrophysical inter
Externí odkaz:
http://arxiv.org/abs/2303.13924
Autor:
Gregory S. G., Holzwarth V. R., Donati J.-F., Hussain G. A. J., Montmerle T., Alecian E., Alencar S. H. P., Argiroffi C., Audard M., Bouvier J., Damiani F., Güdel M., Huenemoerder D. P., Kastner J. H., Maggio A., Sacco G. G., Wade G. A.
Publikováno v:
EPJ Web of Conferences, Vol 64, p 08009 (2014)
V4046 Sagittarii AB is a close short-period classical T Tauri binary. It is a circularised and synchronised system accreting from a circumbinary disk. In 2009 it was observed as part of a coordinated program involving near-simultaneous spectropolarim
Externí odkaz:
https://doaj.org/article/a1197a9bed4f4fdb868be9cbb6f17acd
Autor:
Günther, Hans Moritz, Principe, David A., Melis, Carl, Monsch, Kristina, Schneider, P. Christian, Czesla, S., Wright, Nicholas J., Kashyap, Vinay L., Schmitt, J. H. M. M., Newton, E. R., Drake, Jeremy J., Huenemoerder, D. P.
All cool stars show magnetic activity, and X-ray emission is the hallmark of this activity. Gaining an understanding of activity aids us in answering fundamental questions about stellar astrophysics and in determining the impact of activity on the ex
Externí odkaz:
http://arxiv.org/abs/1903.01547
Autor:
Günther, Hans Moritz, Birnstiel, T., Huenemoerder, D. P., Principe, D. A., Schneider, P. C., Wolk, S. J., Dubois, Franky, Logie, Ludwig, Rau, Steve, Vanaverbeke, Sigfried
RW Aur is a binary system composed of two young, low-mass stars. The primary, RW Aur A, has undergone visual dimming events ($\Delta V =2-3$~mag) in 2011, 2014-16, and 2017-2018. Visual and IR observations indicate a gray absorber that moved into the
Externí odkaz:
http://arxiv.org/abs/1807.06995
Autor:
Grinberg, V., Hell, N., Mellah, I. El, Neilsen, J., Sander, A. A. C., Leutenegger, M., Fürst, F., Huenemoerder, D. P., Kretschmar, P., Kühnel, M., Martínez-Núñez, S., Niu, S., Pottschmidt, K., Schulz, N. S., Wilms, J., Nowak, M. A.
Publikováno v:
A&A 608, A143 (2017)
Bright and eclipsing, the high-mass X-ray binary Vela X-1 offers a unique opportunity to study accretion onto a neutron star from clumpy winds of O/B stars and to disentangle the complex accretion geometry of these systems. In Chandra-HETGS spectrosc
Externí odkaz:
http://arxiv.org/abs/1711.06743
Autor:
Oskinova, L. M., Huenemoerder, D. P., Hamann, W. -R., Shenar, T., Sander, A. A. C., Ignace, R., Todt, H.
The blue hypergiant Cyg OB2-12 (B3Ia+) is a representative member of the class of very massive stars in a poorly understood evolutionary stage. We obtained its high-resolution X-ray spectrum using Chandra observatory. PoWR model atmospheres were calc
Externí odkaz:
http://arxiv.org/abs/1707.04473
Observations with powerful X-ray telescopes, such as XMM-Newton and Chandra, significantly advance our understanding of massive stars. Nearly all early-type stars are X-ray sources. Studies of their X-ray emission provide important diagnostics of ste
Externí odkaz:
http://arxiv.org/abs/1702.05613
Autor:
Ayres, Thomas R., Kashyap, V., Saar, S., Huenemoerder, D., Korhonen, H., Drake, J. J., Testa, P., Cohen, O., Garraffo, C., Granzer, T., Strassmeier, K.
COCOA-PUFS is an energy-diverse, time-domain study of the ultra-fast spinning, heavily spotted, yellow giant FK Com (HD117555; G4 III). This single star is thought to be a recent binary merger, and is exceptionally active by measure of its intense ul
Externí odkaz:
http://arxiv.org/abs/1601.03305
Autor:
Corcoran, M. F., Nichols, J. S., Pablo, H., Shenar, T., Pollock, A. M. T., Waldron, W. L., Moffat, A. F. J., Richardson, N. D., Russell, C. M. P., Hamaguchi, K., Huenemoerder, D. P., Oskinova, L., Hamann, W. -R., Naze, Y., Ignace, R., Evans, N. R., Lomax, J. R., Hoffman, J. L., Gayley, K., Owocki, S. P., Leutenegger, M., Gull, T. R., Hole, K. T., Lauer, J., Iping, R. C.
Publikováno v:
ApJ, 809, 132 (15p,2015)
We present an overview of four phase-constrained Chandra HETGS X-ray observations of Delta Ori A. Delta Ori A is actually a triple system which includes the nearest massive eclipsing spectroscopic binary, Delta Ori Aa, the only such object which can
Externí odkaz:
http://arxiv.org/abs/1507.05101