Zobrazeno 1 - 10
of 50
pro vyhledávání: '"H. L. Helfer"'
Autor:
H. L. Helfer
Publikováno v:
The Astrophysical Journal. 880:73
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59dd8d47a04293f8b19aed42873c9318
https://doi.org/10.3847/1538-4357/ab2883
https://doi.org/10.3847/1538-4357/ab2883
Publikováno v:
The Astrophysical Journal. 534:944-966
We present the results of a linearized perturbation analysis for the models of cataclysmic variable (CV) disks and their boundary layers (BLs), discussed in a previous companion paper. For the case of large-scale, azimuthal oscillations in the BL, we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4dd87f7b082afabaaa7968acb72bccb5
https://doi.org/10.1086/308772
https://doi.org/10.1086/308772
Publikováno v:
The Astrophysical Journal. 534:934-943
We consider numerical models of accretion disks and boundary layers (BLs) around white dwarfs in cataclysmic variables (CVs). Our models include the effects of the radial viscous force and are created using the realistic OPAL opacities. We present th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0c1e7b1b9e5517dfd66875088a3926c
https://doi.org/10.1086/308771
https://doi.org/10.1086/308771
Autor:
M. P. Savedoff, H. L. Helfer
Publikováno v:
Astrophysics and Space Science. 188:299-320
The efficiency of the anti-proton (pBAR) production in interstellar clouds is increased by a factor ≳50 when the engendering cosmic-ray protons (CRs) experience diffusive acceleration by shocks. One can represent the pBAR/p observations by a conven
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da643b67183d8492fb493b1043444e1c
https://doi.org/10.1007/bf00644917
https://doi.org/10.1007/bf00644917
A Model for Quasi-periodic Oscillations in Cataclysmic VariablesBased on Boundary Layer Oscillations
Publikováno v:
The Astrophysical Journal. 508:L159-L161
We have performed a linearized perturbation analysis of the disk and boundary layer (BL) in a cataclysmic variable. In the BL, we find a triplet of large-scale, torsional oscillation modes consisting primarily of perturbations of the azimuthal veloci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e5707ac6ad66a4b1e91512cc788898a
https://doi.org/10.1086/311734
https://doi.org/10.1086/311734
Publikováno v:
The Astrophysical Journal. 365:252
M8 est une nebuleuse emissive contenant une region H II a brillance de surface elevee, Hourglass, en direction de laquelle de nombreuses sources IR compactes ont ete detectees. Les images IR multilongueurs d'onde et a haute resolution spatiale de M8
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::473cba6283e0389e540b90915c0e1cfd
https://doi.org/10.1086/169477
https://doi.org/10.1086/169477
Autor:
H. L. Helfer, P. A. Jennens
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 172:681-694
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5bee13faf75e25e75a0516c9608aff3e
https://doi.org/10.1093/mnras/172.3.681
https://doi.org/10.1093/mnras/172.3.681
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 209:209-214
VLA radio maps at 5-GHz of the G10.2-0.3 H II region in the W31 complex reveal an extended ionization ridge of dimensions 5.7 x 2.9 sq pc at an assumed distance of 7 kpc. In the ridge, 21 dense clumps have been found with characteristic emission meas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f8b1cb9a303405e1c39d68296ec09ba
https://doi.org/10.1093/mnras/209.2.209
https://doi.org/10.1093/mnras/209.2.209
Autor:
H. L. Helfer, J. N. McMullin
Publikováno v:
Solar Physics. 53:471-488
The problem of predicting the radio emission from the quiet Sun for meter and decameter waves may be formulated in terms of a standard radiative transfer problem with conservative scattering. One may therefore avoid the numerical complications involv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06eb212933971ba390aaf07a59c20f05
https://doi.org/10.1007/bf00160290
https://doi.org/10.1007/bf00160290
Autor:
H. L. Helfer, P. A. Jennens
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 172:701-705
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34b83ed62aaa2ff7aff5a09c40173141
https://doi.org/10.1093/mnras/172.3.701
https://doi.org/10.1093/mnras/172.3.701