dc.contributor.author |
Solovyeva Y. |
|
dc.contributor.author |
Vinokurov A. |
|
dc.contributor.author |
Fabrika S. |
|
dc.contributor.author |
Kostenkov A. |
|
dc.contributor.author |
Sholukhova O. |
|
dc.contributor.author |
Sarkisyan A. |
|
dc.contributor.author |
Valeev A. |
|
dc.contributor.author |
Atapin K. |
|
dc.contributor.author |
Spiridonova O. |
|
dc.contributor.author |
Moskvitin A. |
|
dc.contributor.author |
Nikolaeva E. |
|
dc.date.accessioned |
2020-01-15T21:49:50Z |
|
dc.date.available |
2020-01-15T21:49:50Z |
|
dc.date.issued |
2019 |
|
dc.identifier.issn |
1745-3925 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/156250 |
|
dc.description.abstract |
© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We have found three new luminous blue variable (LBV) candidates in the star-forming galaxy NGC4736. They show typical well-known LBV spectra, broad and strong hydrogen lines, He I lines, many Fe II lines, and forbidden [Fe II ] and [Fe III ]. Using archival Hubble Space Telescope and ground-based telescope data, we have estimated the bolometric magnitudes of these objects from -8.4 to -11.5, temperatures, and reddening. Source NGC4736 1 (M v = -10.2 ± 0.1 mag) demonstrated variability between 2005 and 2018 as ΔV ≈ 1.1 mag and ΔB ≈ 0.82 mag; the object belongs to LBV stars. NGC4736 2 (M v < -8.6 mag) shows PCyg profiles and its spectrum has changed from 2015 to 2018. The brightness variability of NGC4736 2 is ΔV ≈ 0.5 mag and ΔB ≈ 0.4 mag. In NGC4736-3 (M v =-8.2 ± 0.2 mag), we found strong nebular lines, broad wings of hydrogen; the brightness variation is only ≈0.2 mag. Therefore, the last two objects may reside to LBV candidates. |
|
dc.relation.ispartofseries |
Monthly Notices of the Royal Astronomical Society: Letters |
|
dc.subject |
galaxies: individual: NGC4736 |
|
dc.subject |
stars: emission-line, Be |
|
dc.subject |
stars: massive |
|
dc.title |
New luminous blue variable candidates in NGC 4736 |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
1 |
|
dc.relation.ispartofseries-volume |
484 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
L24 |
|
dc.source.id |
SCOPUS17453925-2019-484-1-SID85062185997 |
|