- ID:
- ivo://CDS.VizieR/J/MNRAS/421/2616
- Title:
- LMC eccentric ellipsoidal red giant binaries
- Short Name:
- J/MNRAS/421/2616
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Modelling ellipsoidal variables with known distances can lead to exact determination of the masses of both components, even in the absence of eclipses. We present such modelling using light and radial velocity curves of ellipsoidal red giant binaries in the Large Magellanic Cloud (LMC), where they are also known as sequence E stars. Stars were selected as likely eccentric systems on the basis of light curve shape alone. We have confirmed their eccentric nature and obtained system parameters using the Wilson-Devinney code.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/555/A141
- Title:
- LMC emission-line stars. Armagh survey
- Short Name:
- J/A+A/555/A141
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Accurate astrometry is required to reliably cross-match 20th-century photographic catalogues against 21st-century digital surveys. The present work provides modern-area identifications and astrometry for the 801 emission-line objects "of stellar appearance" in the Armagh survey (the largest of its nature to date). Targets have been individually identified in digital images using the Armargh Atlas and, in most cases, unambiguously matched to entries in the UCAC astrometric catalogues.
273. LMC extended catalog
- ID:
- ivo://CDS.VizieR/J/AJ/117/238
- Title:
- LMC extended catalog
- Short Name:
- J/AJ/117/238
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A survey of extended objects in the Large Magellanic Cloud was carried out on the ESO/SERC R and J Sky Survey Atlases, checking entries in previous catalogs and searching for new objects. The census provided 6659 objects including star clusters, emission-free associations, and objects related to emission nebulae. Each of these classes contains three subclasses with intermediate properties, which are used to infer total populations. The survey includes cross identifications among catalogs, and we present 3246 new objects. We provide accurate positions, classification, and homogeneous measurements of sizes and position angles, as well as information on cluster pairs and hierarchical relation for superimposed objects. This unification and enlargement of catalogs is important for future searches of fainter and smaller new objects. We discuss the angular and size distributions of the objects of the different classes. The angular distributions show two off-centered systems with different inclinations, suggesting that the LMC disk is warped. The present catalog together with its previous counterpart for the SMC and the inter-Cloud region provide a total population of 7847 extended objects in the Magellanic System. The angular distribution of the ensemble reveals important clues on the interaction between the LMC and SMC.
- ID:
- ivo://CDS.VizieR/J/A+AS/73/37
- Title:
- LMC faint stars BV photometry
- Short Name:
- J/A+AS/73/37
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Photometric data on the Johnson BV system are given for 947 stars in a field close to the bar of the Large Magellanic Cloud. The data have been determined from electronographs calibrated through photoelectric photometry. The visual magnitudes of the programme stars range from V=14.63 to V=23.13.
- ID:
- ivo://CDS.VizieR/J/AJ/117/206
- Title:
- LMC far-ultraviolet imaging
- Short Name:
- J/AJ/117/206
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present an analysis of the deepest pure UV observations with the highest angular resolution ever performed, a set of 12 exposures with the Hubble Space Telescope (HST) Wide Field Planetary Camera 2 and F160BW filter obtained in parallel observing mode, which covers ~12arcmin^2^ in the Large Magellanic Cloud (LMC), north of the bar, and in the "general field" regime of the LMC. The 341 independent measurements of 198 objects represent an accumulated exposure of >=2x10^4^s and reveal stars as faint as m_UV_~=22mag. The observations show that about two-thirds of the UV emission from the LMC is emitted by our HST-detected UV stars in the field, that is, not in clusters or associations. We identified optical counterparts in the Royal Observatory Edinburgh/Naval Research Laboratory photometric catalog for about one-third of the objects.
- ID:
- ivo://CDS.VizieR/J/MNRAS/357/645
- Title:
- LMC far-UV HST observations
- Short Name:
- J/MNRAS/357/645
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a new analysis of the deepest pure-ultraviolet (UV) observations with the highest angular resolution ever performed. A set of 12 exposures with the Hubble Space Telescope (HST) WFPC2 and F160BW filter obtained in parallel observing mode, which cover ~12arcmin^2^ in the Large Magellanic Cloud (LMC), north of the bar and in the 'general field' region of the LMC, contain stars with far-UV monochromatic magnitudes as faint as 22mag. The 198 detected UV sources represent an accumulated exposure of 2x10^4^s and reveal stars as faint as m_UV_=~20mag. We combine these observations with deep UBVI charge-coupled device (CCD) imaging of the same region reaching as faint as V=~26mag, and reselect probable optical counterparts for the UV sources. After a two-stage search-and-analysis process, we detect robust counterparts for 129 stars. These are mostly upper main-sequence stars, from early B to early A spectral classes, with several F stars. We point out the lack of blue supergiants, which could have been easily detected in our survey. We measure a foreground extinction E(B-V)=~0.08mag by Galactic dust and a surface density of star formation rate twice the average Galactic value. These observations indicate that relatively recent star formation took place even off the bar of the LMC.
277. LMC F supergiants
- ID:
- ivo://CDS.VizieR/J/A+A/293/347
- Title:
- LMC F supergiants
- Short Name:
- J/A+A/293/347
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- (no description available)
- ID:
- ivo://CDS.VizieR/J/A+AS/121/247
- Title:
- LMC galactic foreground stars UBV photometry
- Short Name:
- J/A+AS/121/247
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In addition to the list of UBV photometries of 955 galactic foreground stars in the direction to the Large Magellanic Cloud published by Gochermann et al. (1993A&AS...99..591G), a supplement of 545 stars is presented, which have been measured with the same photometric accuracy. Moreover, less reliable photometries of 379 further foreground stars are listed in a separate table. The homogeneous data base of more than 1500 high accuracy photometries represented by these stars has been used to construct a reddening distribution map of the galactic foreground towards the LMC by Oestreicher et al. (1995A&AS..112..495O).
- ID:
- ivo://CDS.VizieR/J/A+A/586/A71
- Title:
- LMC 0.2-100GeV images
- Short Name:
- J/A+A/586/A71
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The nearby Large Magellanic Cloud (LMC) provides a rare opportunity of a spatially resolved view of an external star-forming galaxy in {gamma}-rays. The LMC was detected at 0.1-100GeV as an extended source with CGRO/EGRET and using early observations with the Fermi-LAT. The emission was found to correlate with massive star-forming regions and to be particularly bright towards 30 Doradus. Studies of the origin and transport of cosmic rays (CRs) in the Milky Way are frequently hampered by line-of-sight confusion and poor distance determination. The LMC offers a complementary way to address these questions by revealing whether and how the {gamma}-ray emission is connected to specific objects, populations of objects, and structures in the galaxy. We revisited the {gamma}-ray emission from the LMC using about 73 months of Fermi-LAT P7REP data in the 0.2-100GeV range. We developed a complete spatial and spectral model of the LMC emission, for which we tested several approaches: a simple geometrical description, template-fitting, and a physically driven model for CR-induced interstellar emission.
- ID:
- ivo://CDS.VizieR/J/AJ/140/328
- Title:
- LMC High-amplitude delta Scuti stars
- Short Name:
- J/AJ/140/328
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present 2323 high-amplitude {delta}-Scuti (HADS) candidates discovered in the Large Magellanic Cloud by the SuperMACHO survey (Rest et al., 2005ApJ...634.1103R). Frequency analyses of these candidates reveal that several are multimode pulsators, including 119 whose largest amplitude of pulsation is in the fundamental (F) mode and 19 whose largest amplitude of pulsation is in the first overtone (FO) mode.
