Zobrazeno 1 - 10
of 213
pro vyhledávání: '"J. J. Drake"'
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 109 (2024)
Hard X-ray-emitting ( δ -type) symbiotic binaries, which exhibit a strong hard X-ray excess, have posed a challenge to our understanding of accretion physics in degenerate dwarfs. RT Cru, which is a member of the δ -type symbiotics, shows stochasti
Externí odkaz:
https://doaj.org/article/c1e3933fe01b4a19926904d825985394
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 140 (2023)
The high-energy radiation emitted by young stars can have a strong influence on their rotational evolution at later stages. This is because internal photoevaporation is one of the major drivers of the dispersal of circumstellar disks, which surround
Externí odkaz:
https://doaj.org/article/a84d64ad42e54328943982f3cfe72a0e
Autor:
E. Flaccomio, J. F. Albacete-Colombo, J. J. Drake, M. G. Guarcello, V. Kashyap, N. J. Wright, K. Briggs, B. Ercolano, M. McCollough, S. Sciortino
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 269, Iss 1, p 12 (2023)
We analyze the X-ray spectra of the ∼8000 sources detected in the Cygnus OB2 Chandra Legacy Survey (this focus issue), with the goals of characterizing the coronal plasma of the young low-mass stars in the region and estimating their intrinsic X-ra
Externí odkaz:
https://doaj.org/article/b1ffde7ea00d4aedb9565f7a7f5f8508
Autor:
M. G. Guarcello, J. J. Drake, N. J. Wright, J. F. Albacete-Colombo, C. Clarke, B. Ercolano, E. Flaccomio, V. Kashyap, G. Micela, T. Naylor, N. Schneider, S. Sciortino, J. S. Vink
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 269, Iss 1, p 13 (2023)
In our Galaxy, star formation occurs in a variety of environments, with a large fraction of stars formed in clusters hosting massive stars. OB stars have an important feedback on the evolution of protoplanetary disks orbiting around nearby young star
Externí odkaz:
https://doaj.org/article/0456c598c4c14ca3ab336ca4a9720747
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 269, Iss 1, p 11 (2023)
We investigate the uncertainties of fitted X-ray model parameters and fluxes for relatively faint Chandra ACIS-I source spectra. Monte Carlo (MC) simulations are employed to construct a large set of 150,000 fake X-ray spectra in the low photon count
Externí odkaz:
https://doaj.org/article/2e7c0f01eb8949dc9700debffe0e43bb
Autor:
M. G. Guarcello, J. J. Drake, N. J. Wright, T. Naylor, E. Flaccomio, V. L. Kashyap, D. García-Alvarez
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 269, Iss 1, p 9 (2023)
The young massive OB association Cygnus OB2, in the Cygnus X complex, is the closest (∼1400 pc) star-forming region to the Sun hosting thousands of young low-mass stars and up to 1000 OB stars, among which are some of the most massive stars known i
Externí odkaz:
https://doaj.org/article/d143a56e8a3c43afa384ac6f71a6a74f
Autor:
J. F. Albacete-Colombo, J. J. Drake, E. Flaccomio, N. J. Wright, V. Kashyap, M. G. Guarcello, K. Briggs, J. E. Drew, D. M. Fenech, G. Micela, M. McCollough, R. K. Prinja, N. Schneider, S. Sciortino, J. S. Vink
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 269, Iss 1, p 14 (2023)
We present a large-scale study of diffuse X-ray emission in the nearby massive stellar association Cygnus OB2 as part of the Chandra Cygnus OB2 Legacy Program. We used 40 Chandra X-ray ACIS-I observations covering ∼1.0 deg ^2 . After removing 7924
Externí odkaz:
https://doaj.org/article/9b591d752e11426aba233f62e3ef3500
Autor:
Marina Orio, E. Behar, G. J. M. Luna, J. J. Drake, J. Gallagher, J. S. Nichols, J. U. Ness, A. Dobrotka, J. Mikolajewska, M. Della Valle, R. Ignace, R. Rahin
The 2021 outburst of the symbiotic recurrent nova RS Oph was observed with the Chandra High Energy Transmission Gratings (HETG) on day 18 after optical maximum and with XMM-Newton and its Reflection Grating Spectrographs (RGS) on day 21, before the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aea0ea83cb14ee4a4a13a740514113da
http://arxiv.org/abs/2209.02123
http://arxiv.org/abs/2209.02123
Autor:
K L Page, A P Beardmore, J P Osborne, U Munari, J-U Ness, P A Evans, M F Bode, M J Darnley, J J Drake, N P M Kuin, T J O’Brien, M Orio, S N Shore, S Starrfield, C E Woodward
Publikováno v:
Page, K L, Beardmore, A P, Osborne, J P, Munari, U, Ness, J-U, Evans, P A, {Bode}, M F, Darnley, M J, Drake, J J, Kuin, N P M, O'Brien, T J, Orio, M, Shore, S N, Starrfield, S & Woodward, C E 2022, ' The 2021 outburst of the recurrent nova RS Ophiuchi observed in X-rays by the Neil Gehrels Swift Observatory: a comparative study ', Monthly Notices of the Royal Astronomical Society, vol. 514, no. 2, stac1295, pp. 1557-1574 . https://doi.org/10.1093/mnras/stac1295
On 2021 August 8, the recurrent nova RS Ophiuchi erupted again, after an interval of 15.5 yr. Regular monitoring by the Neil Gehrels Swift Observatory began promptly, on August 9.9 (0.37 day after the optical peak), and continued until the source pas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70bbb43ea392d1f41ad5784d86badcb2
http://arxiv.org/abs/2205.03232
http://arxiv.org/abs/2205.03232
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 500:4801-4817
RT Cru belongs to the rare class of hard X-ray emitting symbiotics, whose origin is not yet fully understood. In this work, we have conducted a detailed spectroscopic analysis of X-ray emission from RT Cru based on observations taken by the Chandra O
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c23435b5650818af1f7ab3e568681de
https://doi.org/10.1093/mnras/staa3554
https://doi.org/10.1093/mnras/staa3554