TY  - JOUR
A1  - Gvaramadze, V. V.
A1  - Kniazev, Alexei Y.
A1  - Oskinova, Lida
T1  - Discovery of a putative supernova remnant around the long-period X-ray pulsar SXP 1323 in the Small Magellanic Cloud
JF  - Monthly notices of the Royal Astronomical Society
N2  - We report the discovery of a circular shell centred on the Be X-ray binary (BeXB) SXP 1323 in the Small Magellanic Cloud. The shell was detected in an H α image obtained with the Very Large Telescope. Follow-up spectroscopy with the Southern African Large Telescope showed that the shell expands with a velocity of ≈100kms−1 and that its emission is due to shock excitation. We suggest that this shell is a remnant of the supernova explosion that led to the formation of SXP 1323’s neutron star ≈40000 yr ago. SXP 1323 represents the second known case of a BeXB associated with a supernova remnant (the first one is SXP 1062). Interestingly, both of these BeXBs harbour long-period pulsars and are located in a low-metallicity galaxy.
KW  - stars: emission-line, Be
KW  - stars: individual: [MA93] 1393
KW  - stars: massive
KW  - ISM: supernova remnants
KW  - X-rays: binaries
KW  - X-rays: individual: SXP 1323
Y1  - 2019
U6  - https://doi.org/10.1093/mnrasl/slz018
SN  - 0035-8711
SN  - 1365-2966
VL  - 485
IS  - 1
SP  - L6
EP  - L10
PB  - Oxford Univ. Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Göttgens, Fabian
A1  - Husser, Tim-Oliver
A1  - Kamann, Sebastian
A1  - Dreizler, Stefan
A1  - Giesers, Benjamin
A1  - Kollatschny, Wolfram
A1  - Weilbacher, Peter Michael
A1  - Roth, Martin M.
A1  - Wendt, Martin
T1  - A stellar census in globular clusters with MUSE: A spectral catalogue of emission-line sources
JF  - Astronomy and astrophysics : an international weekly journal
N2  - Aims. Globular clusters produce many exotic stars due to a much higher frequency of dynamical interactions in their dense stellar environments. Some of these objects were observed together with several hundred thousand other stars in our MUSE survey of 26 Galactic globular clusters. Assuming that at least a few exotic stars have exotic spectra (i.e. spectra that contain emission lines), we can use this large spectroscopic data set of over a million stellar spectra as a blind survey to detect stellar exotica in globular clusters. Methods. To detect emission lines in each spectrum, we modelled the expected shape of an emission line as a Gaussian curve. This template was used for matched filtering on the di fferences between each observed 1D spectrum and its fitted spectral model. The spectra with the most significant detections of H alpha emission are checked visually and cross-matched with published catalogues. Results. We find 156 stars with H alpha emission, including several known cataclysmic variables (CV) and two new CVs, pulsating variable stars, eclipsing binary stars, the optical counterpart of a known black hole, several probable sub-subgiants and red stragglers, and 21 background emission-line galaxies. We find possible optical counterparts to 39 X-ray sources, as we detected H alpha emission in several spectra of stars that are close to known positions of Chandra X-ray sources. This spectral catalogue can be used to supplement existing or future X-ray or radio observations with spectra of potential optical counterparts to classify the sources.
KW  - globular clusters: general
KW  - stars: emission-line, Be
KW  - novae
KW  - cataclysmic variables
KW  - catalogs
KW  - techniques: imaging spectroscopy
Y1  - 2019
U6  - https://doi.org/10.1051/0004-6361/201936485
SN  - 0004-6361
SN  - 1432-0746
VL  - 631
PB  - EDP Sciences
CY  - Les Ulis
ER  -