9 citations · 42 across the 14 of their papers we have counts for
14 papers
The changing optical and X-ray emission of the dormant Cas star HD 45314
G. Rauw, Y. Nazé, E. Bryssinck +25
Cas stars are Oe/Be stars that exhibit bright and hard X-ray emission. HD45314 belonged to this category, but lost its Cas characteristics as its circumstellar disc started…
Symbiotic binaries in the Gaia data. II. Symbiotic candidates from general variability classification in DR3
Jaroslav Merc, Lionel Mulato, Joanna Mikołajewska +7
We investigate the reliability of the symbiotic star class in the general variability classification of Gaia DR3 and search for new genuine symbiotic systems among the objects assi…
Analysis of the Gaia DR3 planetary nebula candidates and the possible symbiotic stars among them
Lionel Mulato, Jaroslav Merc, Stéphane Charbonnel +3
The Gaia DR3, released in June 2022, included low-resolution BP/RP (XP) spectra that have been exploited for the classification of various types of emission-line objects using mach…
V4141 Sgr: Outflows and repeated outbursts
Jaroslav Merc, Joanna Mikołajewska, Thomas Petit +6
In this work, we analyze the ongoing brightening of the poorly studied symbiotic star V4141 Sgr and examine its long-term variability. We present new low-resolution spectroscopic o…
The birth of Be star disks I. From localized ejection to circularization
J. Labadie-Bartz, A. C. Carciofi, A. C. Rubio +35
Classical Be stars are well known to eject mass, but the details governing the initial distribution and evolution of this matter into a disk are poorly constrained by observations.…
Spectral evolution of the narrow emission line components in optical during the 2022 nova eruption of U Scorpii
Katsuki Muraoka, Naoto Kojiguchi, Junpei Ito +20
There remains debate over whether the accretion disk survives or is entirely disrupted after the nova eruption. In our previous paper, Muraoka et al. (2024, PASJ, 76, 293) have pho…
Search for new Galactic Wolf-Rayet stars using Gaia DR3. I. Candidate selection and the follow-up of the bright sample
Lionel Mulato, Jaroslav Merc, Stéphane Charbonnel +3
Gaia DR3, released in June 2022, included low-resolution XP spectra that have been used for the classification of various types of emission-line objects through machine-learning te…
Gaia23ckh: Symbiotic outburst of the assumed Mira variable V390 Sco
Jaroslav Merc, Peter Velez, Stéphane Charbonnel +5
The poorly studied variable star V390 Sco, previously classified as a Mira pulsator, was detected in a brightening event by the ESA Gaia satellite in September 2023. This work pres…
Extended far-UV emission surrounding asymptotic giant branch stars as seen by GALEX
V. Răstău, M. Mečina, F. Kerschbaum +5
Aims. Our goal is to study the long-term mass-loss rate characteristics of asymptotic giant branch (AGB) stars through wind-wind and wind-interstellar medium interaction. Methods.…
A planetary collision afterglow and transit of the resultant debris cloud
Matthew Kenworthy, Simon Lock, Grant Kennedy +19
Planets grow in rotating disks of dust and gas around forming stars, some of which can subsequently collide in giant impacts after the gas component is removed from the disk. Monit…
V618 Sgr: Galactic eclipsing symbiotic nova detected in repeated outbursts
J. Merc, R. Gális, P. Velez +9
V618 Sgr was previously classified as an R CrB-type variable and later as a possible symbiotic star. Our study aims to analyse the nature of this target, which is currently undergo…
Grantecan spectroscopic observations and confirmations of Planetary Nebulae candidates in the Northern Galactic Plane
A. Ritter, Q. A. Parker, L. Sabin +3
We present Grantecan 10 m telescope (GTC) spectroscopic confirmations of 55 faint Planetary Nebulae (PNe) candidates discovered largely in the INT Photometric H Survey of the N…
WHTZ 1: A high excitation Planetary Nebula not a gaseous cocoon from runaway star HD 185806
Quentin A. Parker, Pascal Le Dû, Andreas Ritter +6
We present evidence that the nebular cocoon and bow-shock emission nebula putatively and recently reported as deriving from the 9th magnitude "runaway" star HD 185806 is the previo…
DeGaPe 35: Amateur discovery of a new southern symbiotic star
Thomas Petit, Jaroslav Merc, Rudolf Gális +6
In this work, we present the discovery and characterization of a new southern S-type symbiotic star, DeGaPe 35. We have obtained the low-resolution spectroscopic observations and s…