Results 1 to 10 of about 1,532,155 (277)

A 9 Month Hubble Space Telescope Near-UV Survey of M87. I. Light and Color Curves of 94 Novae, and a Redetermination of the Nova Rate

The Astrophysical Journal Supplement Series, 2023
M87 has been monitored with a cadence of 5 days over a span of 9 months through the near-ultraviolet (NUV; F275W) and optical (F606W) filters of the Wide Field Camera 3 (WFC3) of the Hubble Space Telescope.
Michael M. Shara, Alec M. Lessing, Rebekah Hounsell, Shifra Mandel, David Zurek, Matthew J. Darnley, Or Graur, Yael Hillman, Eileen T. Meyer, Joanna Mikolajewska, James D. Neill, Dina Prialnik, William Sparks   +12 more
doaj   +1 more source

A Multiwavelength Light-curve Analysis of the Classical Nova YZ Ret: An Extension of the Universal Decline Law to the Nebular Phase

The Astrophysical Journal, 2023
YZ Ret is the first X-ray flash detected classical nova, and is also observed in optical, X-ray, and gamma-ray. We propose a comprehensive model that explains the observational properties.
Izumi Hachisu, Mariko Kato
doaj   +1 more source

UBVJHKLM Photometry and Low-Resolution Spectroscopy of Nova Delphini 2013 (V339 Del)

Open Astronomy, 2015
We present UBVJHKLM photometric observations of Nova Delphini 2013 that started several hours before maximum light and lasted for 130 nights. Using the obtained data, we derived several photometric parameters of the Nova: the time of maximum light ...
Burlak M. A., Esipov V. F., Komissarova G. V., Shenavrin V. I., Taranova O. G., Tatarnikov A. M., Tatarnikova A. A.   +6 more
doaj   +1 more source

Comprehensive Listing of 208 Nova White Dwarf Masses as the Primary Determinant of Spectral Class and Light-curve Class

The Astrophysical Journal
For Galactic novae, I calculate and collect a comprehensive catalog of 208 measures of white dwarf (WD) masses ( M _WD ) and 232 measures of average V magnitudes in quiescence ( V _q ). These are collected into a comprehensive catalog of most fundamental
Bradley E. Schaefer
doaj   +1 more source

Exploring the Maximum Magnitude versus Rate of Decline Relation for Novae in M31

The Astrophysical Journal Supplement Series
The results of a two-decade-long R -band photometric survey of novae in M31 are presented. From these data, R -band light curves have been determined for 180 novae with data sufficient for estimating the peak brightness and subsequent rate of decline ...
J. Grace Clark, Kamil Hornoch, Allen W. Shafter, Hana Kučáková, Jan Vraštil, Peter Kušnirák, Marek Wolf   +6 more
doaj   +1 more source

Fully Self-consistent Nova Explosion Models Reproducing Light Curves of KT Eri, V339 Del, V597 Pup, and SMC NOVA 2016-10a

The Astrophysical Journal
The rising phase toward the optical maximum of a classical nova is one of the last frontiers of nova study. Constructing free–free emission model light curves based on our fully self-consistent nova explosion models, we present several theoretical light ...
Mariko Kato, Izumi Hachisu, Hideyuki Saio   +2 more
doaj   +1 more source

Identification of a Superbright Nova in Our Galaxy: Revisiting the Light-curve Analyses of the Candidate Novae CP Lac, CP Pup, V838 Her, V597 Pup, V5583 Sgr, and V5589 Sgr

The Astrophysical Journal
The two very fast novae in our Galaxy, V1500 Cyg and V1674 Her, have reached the absolute V magnitude of ${M}_{V,{\rm{\max }}}\approx -10.4$ . These brightest novae are identified as superbright novae.
Izumi Hachisu, Mariko Kato
doaj   +1 more source

The Rise of Nova V1674 Herculis

The Astrophysical Journal
Observational constraints on classical novae are heavily biased to phases near optical peak and later because of the simple fact that novae are not typically discovered until they become bright. The earliest phases of brightening, coming before discovery,
Robert M. Quimby, Brian D. Metzger, Ken J. Shen, Allen W. Shafter, Hank Corbett, Madeline Overton   +5 more
doaj   +1 more source

A Multiwavelength Light-curve Analysis of the Classical Nova KT Eri: Optical Contribution from a Large Irradiated Accretion Disk

The Astrophysical Journal
KT Eri is a classical nova that went into outburst in 2009. Recent photometric analysis in quiescence indicates a relatively longer orbital period of 2.6 days, so that KT Eri could host a very bright accretion disk during the outburst like in the ...
Izumi Hachisu, Mariko Kato, Frederick M. Walter   +2 more
doaj   +1 more source

The critical mass ratio for W UMa-type contact binary systems [PDF]

Serbian Astronomical Journal
Contact binaries are close binary systems in which both components fill their inner Roche lobes so that the stars are in direct contact, and in potential mass and energy exchange.
Arbutina Bojan, Wadhwa Surjit
doaj   +1 more source