56 citations · 417 across the 23 of their papers we have counts for
23 papers
The hybrid Nova Vul 2024 (=V615 Vul)
Paolo Valisa, Ulisse Munari, Irene Albanese
We present daily optical, absolute-fluxed spectroscopy of the heavily reddened Nova Vul 2024 (=V615 Vul), obtained in both low- and high-resolution echelle modes from discovery on…
T CrB: overview of the accretion history, Roche-lobe filling, orbital solution, and radiative modeling
U. Munari, F. Walter, N. Masetti +14
(abridged) We aim to derive a robust estimate of the most important parameters describing the physical nature of T CrB, trace the accretion history onto its white dwarf, and accoun…
Alkali phenoxides in comets
M. Fulle, P. Molaro, A. Rotundi +4
Potassium was first detected in spectra of the sungrazer comet Ikeya-Seki at the heliocentric distance rh = 0.15 au and, 48 years later, in comets PanSTARRS and ISON at rh = 0.46 a…
Atlas of photometric and spectroscopic daily monitoring of the very slow Nova Cas 2021 (=V1405 Cas) during the first 660 days of its outburst
P. Valisa, U. Munari, S. Dallaporta +2
Nova Cas 2021 erupted on 18 March 2021, reaching naked-eye brightness when passing through photometric maximum 53 days later. We describe our ~daily monitoring of its evolution, co…
Persistent nuclear burning in Nova Sgr 2016 N.4 (= V5856 Sgr = ASASSN-16ma) six years past its outburst
U. Munari, N. Masetti, F. M. Walter +4
We report on the fast Nova Sgr 2016 N.4 being surprisingly trapped in a long-lasting and bright plateau (Delta I >= 10 mag above quiescence) six years past the nova eruption. Very…
The 2021 outburst of RS Oph: a pictorial atlas of the spectroscopic evolution. II. From day 19 to 102 (solar conjunction)
Ulisse Munari, Paolo Valisa
We present the second part (days 19 to 102) of our high-resolution Echelle atlas of the spectral evolution of RS Oph during the 2021 nova outburst. Some quick conclusions that can…
The 2021 outburst of RS Oph. A pictorial atlas of the spectroscopic evolution: the first 18 days
U. Munari, P. Valisa
A pictorial atlas of the spectroscopic evolution at optical wavelengths is presented for the first 18 days of the 2021 outburst of the recurrent nova RS Oph, prior to the emergence…
The GALAH Survey and Symbiotic Stars. I. Discovery and follow-up of 33 candidate accreting-only systems
U. Munari, G. Traven, N. Masetti +14
We have identified a first group of 33 new candidates for symbiotic stars (SySt) of the accreting-only variety among the 600,255 stars so far observed by the GALAH high-resolution…
Photometry and spectroscopy of the new symbiotic star 2SXPS J173508.4-292958
U. Munari, P. Valisa, A. Vagnozzi +3
We present and discuss the results of our photometric and spectroscopic monitoring of 2SXPS J173508.4-292958 carried out from April to August 2020. This X-ray source, in the foregr…
The 2018 eruption and long term evolution of the new high-mass Herbig Ae/Be object Gaia-18azl = VES 263
U. Munari, V. Joshi, D. P. K. Banerjee +9
We have been monitoring, at high cadence, the photometric and spectroscopic evolution of VES 263 following the discovery in 2018 of a brightening labeled as event Gaia-18azl. VES 2…
Regulation of accretion by its outflow in a symbiotic star: the 2016 outflow fast state of MWC 560
Adrian B. Lucy, J. L. Sokoloski, U. Munari +11
How are accretion discs affected by their outflows? To address this question for white dwarfs accreting from cool giants, we performed optical, radio, X-ray, and ultraviolet observ…
Study of three 2013 novae: V1830 Aql, V556 Ser and V809 Cep
U. Munari, P. Ochner, S. Dallaporta +7
BVRI photometry and low-, medium- and high-resolution Echelle fluxed spectroscopy is presented and discussed for three faint, heavily reddened novae of the FeII-type which erupted…
The narrow and moving HeII lines in nova KT Eri
U. Munari, E. Mason, P. Valisa
We present outburst and quiescence spectra of the classical nova KT Eri and discuss the appearance of a sharp HeII 4686 Ang emission line, whose origin is a matter of discussion fo…
Potassium detection and Lithium depletion in comets C/2011 L4 (Panstarrs) and C/1965 S1 (Ikeya-Seki)
M. Fulle, P. Molaro, L. Buzzi +1
On 21 March 2013 high-resolution slit spectrographs of comet C/2011 L4 (Panstarrs), at the heliocentric distance r = 0.46 Astronomical Units (AU), were obtained at the Osservatorio…
Photometric evolution, orbital modulation and progenitor of Nova Mon 2012
U. Munari, S. Dallaporta, F. Castellani +4
We present and discuss accurate and densely mapped BVRI lightcurves of the neon Nova Mon 2012, supplemented by the evolution in Stromgren b and y bands and in the integrated flux o…
Optical Morphology, Inclination and Expansion Velocity of the Ejected Shell of Nova Monocerotis 2012
V. A. R. M. Ribeiro, U. Munari, P. Valisa
The morphology of the ejected shell of the He/N Nova Monocerotis 2012 outburst was studied in detail. Synthetic line profile spectra were compared to the [O {\sc iii}] 4959,5007 Å…
V496 Scuti: Detection of CO emission and dust shell in a moderately fast Fe II nova
Ashish Raj, N. M. Ashok, D. P. K. Banerjee +3
We present near-infrared and optical observations of moderately fast FeII-class Nova Scuti 2009 (V496 Sct) covering various phases; pre-maximum, early decline and nebular, during t…
V496 Scuti: An Fe II nova with dust shell accompanied by CO emission
Ashish Raj, N. M. Ashok, D. P. K. Banerjee +3
We present near-infrared and optical observations of the nova V496 Scuti 2009 covering various phases - pre-maximum, early decline and nebular - during the first 10 months of its d…
Formation of a disk structure in the symbiotic binary AX Per during its 2007-10 precursor-type activity
A. Skopal, T. N. Tarasova, Z. Cariková +12
AX Per is an eclipsing symbiotic binary. During active phases, deep narrow minima are observed in its light curve, and the ionization structure in the binary changes significantly.…
The large amplitude outburst of the young star HBC 722 in NGC 7000/IC 5070, a new FU Orionis candidate
E. Semkov, S. Peneva, U. Munari +2
We report the discovery of a large amplitude outburst from the young star HBC 722 (LkHA 188 G4) located in the region of NGC 7000/IC 5070. On the basis of photometric and spectrosc…
The 2010 nova outburst of the symbiotic Mira V407 Cyg
U. Munari, V. H. Joshi, N. M. Ashok +6
The nova outburst experienced in 2010 by the symbiotic binary Mira V407 Cyg has been extensively studied at optical and infrared wavelengths with both photometric and spectroscopic…
An extensive optical study of V2491 Cyg (Nova Cyg 2008 N.2), from maximum brightness to return to quiescence
U. Munari, A. Siviero, S. Dallaporta +3
The photometric and spectroscopic evolution of the He/N and very fast Nova Cyg 2008 N2 (V2491 Cyg) is studied in detail. A primary maximum was reached at V=7.45 +/-0.05 on April 11…
The nature and evolution of Nova Cygni 2006
U. Munari, A. Siviero, A. Henden +13
AIMS: Nova Cyg 2006 has been intensively observed throughout its full outburst. We investigate the energetics and evolution of the central source and of the expanding ejecta, their…