Results 31 to 40 of about 14,518 (263)

The 1999 Optical Outburst of the Fast X-Ray Nova, V4641 Sagittarii [PDF]

Publications of the Astronomical Society of Japan, 2002
We report on the detection of an optical outburst which preceded the X-ray main flare of the fast X-ray nova V4641 Sagittarii. The object became active since early August 1999, and then experienced an optical outburst reaching 8.8 mag on 1999 September 15. The observed maximum was between two X-ray flares, that is, 12.1 hr after the X-ray sub-flare and
Makoto Uemura, Taichi Kato, Tsutomu Watanabe, Rod Stubbings, Berto Monard, Kawai Nobuyuki   +5 more
openaire   +1 more source

AT 2019qyl in NGC 300: Internal Collisions in the Early Outflow from a Very Fast Nova in a Symbiotic Binary* † [PDF]

The Astrophysical Journal, 2021
Abstract Nova eruptions, thermonuclear explosions on the surfaces of white dwarfs (WDs), are now recognized to be among the most common shock-powered astrophysical transients. We present the early discovery and rapid ultraviolet (UV), optical, and infrared (IR) temporal development of AT 2019qyl, a recent nova in the nearby Sculptor ...
Jacob E. Jencson, Jennifer E. Andrews, Howard E. Bond, Viraj Karambelkar, David J. Sand, Schuyler D. van Dyk, Nadejda Blagorodnova, Martha L. Boyer, Mansi M. Kasliwal, Ryan M. Lau, Shazrene Mohamed, Robert Williams, Patricia A. Whitelock, Rachael C. Amaro, K. Azalee Bostroem, Yize Dong, Michael J. Lundquist, Stefano Valenti, Samuel D. Wyatt, Jamie Burke, Kishalay De, Saurabh W. Jha, Joel Johansson, César Rojas-Bravo, David A. Coulter, Ryan J. Foley, Robert D. Gehrz, Joshua Haislip, Daichi Hiramatsu, D. Andrew Howell, Charles D. Kilpatrick, Frank J. Masci, Curtis McCully, Chow-Choong Ngeow, Yen-Chen Pan, Craig Pellegrino, Anthony L. Piro, Vladimir Kouprianov, Daniel E. Reichart, Armin Rest, Sofia Rest, Nathan Smith   +41 more
openaire   +5 more sources

V1494 Aql: Eclipsing Fast Nova with an Unusual Orbital Light Curve [PDF]

Publications of the Astronomical Society of Japan, 2004
Abstract We present the time-resolved photometry of V1494 Aql (Nova Aql 1999 No. 2) between 2001 November and 2003 June. The object is confirmed to be an eclipsing nova with a period of 0.1346138(2) d. The eclipses were present in all observed epochs.
Kato, T., Ishioka, R., Uemura, M., Starkey, D. R., Krajci, T.   +4 more
openaire   +2 more sources

Light curves and absolute magnitudes of four recent fast LMC novae [PDF]

International Astronomical Union Colloquium, 2004
AbstractThe light curves of four recent fast LMC novae (Nova LMC 1988a, 1992, 1995, 2000) have been analysed to obtain the parameter t2 the time for a two magnitude decline below maximum light. Using the calibration of Della Valle & Livio (1995), values of MV at maximum are obtained.
J.B. Hearnshaw, C.M. Livingston, A.C. Gilmore, P.M. Kilmartin   +3 more
openaire   +1 more source

Swift X-Ray Observations of Classical Novae. II. The Super Soft Source sample

, 2011
The Swift GRB satellite is an excellent facility for studying novae. Its rapid response time and sensitive X-ray detector provides an unparalleled opportunity to investigate the previously poorly sampled evolution of novae in the X-ray regime. This paper
A. P. Beardmore, Anupama, Anupama, Ayani, Ayani, Ayani, Baklanov, Balman, Balman, Balman, Beardmore, Bode, Bode, Bode, Bode, Bode, Bode, Bos, Boyd, Bruch, Buil, Camilleri, Charles E. Woodward, Chochol, Chochol, Cragg, Czart, della Valle, Diaz, Drake, Drake, Drake, Duerbeck, Duerbeck, Evans, Evans, Ferri, Frederick M. Walter, Fujii, Gilmore, Greg J. Schwarz, Hachisu, Hachisu, Hachisu, Hanzl, Helton, Helton, Helton, Helton, Hernanz, Hernanz, Hernanz, Hirosawa, Hounsell, Iijima, Iijima, J. P. Osborne, Jan-Uwe Ness, Jeremy J. Drake, K. L. Page, Kang, Kato, Kato, Kato, Kato, Kiss, Kiss, Krauss Hartman, Krautter, Krautter, L. Andrew Helton, Lane, Lee, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Liller, Lyke, Lynch, Lynch, Lynch, Lynch, Lynch, Lynch, Lynch, Mason, Mazuk, Mazuk, Mike Bode, Munari, Munari, Munari, Munari, Munari, Munari, Munari, Munari, Naito, Naito, Naito, Naito, Naito, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nakano, Nelson, Nelson, Nelson, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Ness, Nishimura, Nishiyama, O'Brien, O'Brien, O'Brien, Orio, Orio, Osborne, Osborne, Osborne, P. A. Evans, Pagnotta, Pereira, Perry, Pigulski, Pojmanski, Pojmanski, Pojmanski, Pojmanski, Pojmanski, Prieto, Puetter, Rafanelli, Ragan, Rauch, Reinsch, Retter, Ribeiro, Rudy, Rudy, Rudy, Rudy, Rudy, Rudy, Rudy, Russell, Russell, Russell, Russell, Russell, Russell, Russell, Sadakane, Saizar, Sala, Samus, Schaefer, Schaefer, Schlegel, Schlegel, Schlegel, Schwarz, Schwarz, Schwarz, Schwarz, Schwarz, Schwarz, Shafter, Shara, Shore, Shore, Shore, Sitko, Siviero, Siviero, Snijders, Soma, Sostero, Starrfield, Starrfield, Starrfield, Stickland, Stringfellow, Strope, Sugano, Sumner Starrfield, Suzuki, Swierczynski, Takamizawa, Terada, Tomov, Tomov, Tsujimoto, van den Bergh, Vanlandingham, Vanlandingham, Vanlandingham, Vaytet, Waagen, Waagen, Wagner, Walder, Walter, Warner, Whitelock, Williams, Yamaoka, Yamaoka, Yaron   +235 more
core   +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

Thermonuclear Runaways on Accreting White Dwarfs: Models of Classical Novae Explosions [PDF]

, 2000
The mechanism of classical novae explosions is explained, together with some of their observational properties. The scarce but not null impact of novae in the chemical evolution of the Milky Way is analyzed, as well as their relevance for the ...
Hernanz, Margarita, Jose, Jordi
core   +3 more sources

Influence of an Oxygen‐Free Atmosphere on Diamond‐Single‐Grain Scratching of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
Single‐grain scratching of Ti–6Al–4V is investigated under controlled, oxygen‐free, and ambient atmospheres using a novel experimental setup with in situ high‐speed imaging. The approach enables direct observation of chip formation and adhesion under suppressed oxidation.
Berend Denkena, Benjamin Bergmann, Michael Zenger   +2 more
wiley   +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

Pre-maximum and maximum of Novae: The spectroscopic observations of Nova ASASSN-17hx [PDF]

, 2018
The coverage of the pre-maximum stage of novae is sparse, with the exception of a few slow novae where the pre-maximum duration is of the order of some weeks.
Poggiani, Rosa
core   +2 more sources