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51. IR sources in Magellanic Clouds
ID:
ivo://CDS.VizieR/II/181
Title:
IR sources in Magellanic Clouds
Short Name:
II/181
Date:
21 Oct 2021
Publisher:
CDS
Description:
The authors have used the IRAS data to construct maps of the Magellanic Clouds at wavelengths of 12, 25, 60, and 100 microns. These are contained in the published volume only. The position and characteristics of each source are included in this compilation. Also included are cross references to sources at other wavelengths (H-alpha emission nebulae, dark clouds, and stars) when these could be reasonably identified with the IR sources. IRAS IDs and the DPM field are also given.
52. JHK photometry in NGC 6334 IV
ID:
ivo://CDS.VizieR/J/A+A/357/1020
Title:
JHK photometry in NGC 6334 IV
Short Name:
J/A+A/357/1020
Date:
21 Oct 2021
Publisher:
CDS
Description:
Sub-arcsecond JHK images of the star formation region NGC 6334 IV covering 14.7arcmin^2^ have been obtained. These were supplemented by H_2_ and Br{gamma} images of the central 2arcmin^2^. A total of 1238sources brighter than K=~17 were detected. Due to the very high extinction in this region, only 685 of these are brighter at 1.2{mu}m than our limit, J=~20. Only less than 5% of the sources exhibit excess emission at {lambda}>2.0{mu}m and they are scattered over the whole area covered. No evidence of a developed stellar cluster was found, but a small number of luminous (O-B2) young stellar objects were detected. These are embedded in the densest part of the molecular cloud that is at the centre of a giant bipolar structure seen in the radio and the infrared. This morphology is the result of the effect of massive stellar winds originating from the centre of a dense molecular toroid which collimates the outflow material giving rise to two lobes of thermal gas and dust emission. We confirm that the extinction is higher toward the southern lobe than toward the northern one but both are less reddened than their immediate surroundings. A new centre of active massive star formation is reported to the east of the central region. Close to a (sub)millimeter emission peak, a large infrared nebula with several point-like sources was found at 2.2{mu}m. The discovery of a small embedded low-luminosity bipolar object in the vicinity of one of the giant lobes is also reported. For a description of the JHK photometric system, see e.g. <GCPD/09>
53. JHK photometry of NGC1333
ID:
ivo://CDS.VizieR/J/AJ/111/1964
Title:
JHK photometry of NGC1333
Short Name:
J/AJ/111/1964
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of an extensive near-infrared (JHK) imaging survey of the NGC 1333 star forming region. Our survey covers an area more than 4 times larger than the previous imaging survey of this cloud reported by Aspin et al. (1994, Cat. <J/A+AS/106/165>) and is sufficiently sensitive to render an accurate census of the embedded stellar population in the cloud. We detected 275 sources with m_K_<14.5mag within the 432 square arcminute region surveyed.
54. JHKs photometry of Hourglass nebula
ID:
ivo://CDS.VizieR/J/MNRAS/366/739
Title:
JHKs photometry of Hourglass nebula
Short Name:
J/MNRAS/366/739
Date:
21 Oct 2021
Publisher:
CDS
Description:
A detailed study of the Hourglass nebula in the M8 star-forming region is presented. The study is mainly based on recent subarcsec-resolution JHKs images taken at Las Campanas Observatory and complemented with archival Hubble Space Telescope (HST) images and long-slit spectroscopy retrieved from the European Southern Observatory Archive Facility. Using the new numerical code CHORIZOS, we estimate the distance to the earliest stars in the region to be 1.25kpc. Infrared photometry of all the sources detected in the field is given.
55. K2 ugri & H{alpha} photometry in the Lagoon Nebula
ID:
ivo://CDS.VizieR/J/AJ/162/101
Title:
K2 ugri & H{alpha} photometry in the Lagoon Nebula
Short Name:
J/AJ/162/101
Date:
14 Mar 2022 06:42:13
Publisher:
CDS
Description:
Space observatories have provided unprecedented depictions of the many variability behaviors typical of low-mass, young stars. However, those studies have so far largely omitted more massive objects (~2M{sun} to 4-5M{sun}) and were limited by the absence of simultaneous, multiwavelength information. We present a new study of young star variability in the ~1-2Myr old, massive Lagoon Nebula region. Our sample encompasses 278 young, late B to K-type stars, monitored with Kepler/K2. Auxiliary u, g, r, i, H{alpha} time-series photometry, simultaneous with K2, was acquired at the Paranal Observatory. We employed this comprehensive data set and archival infrared photometry to determine individual stellar parameters, assess the presence of circumstellar disks, and tie the variability behaviors to inner disk dynamics. We found significant mass-dependent trends in variability properties, with B/A stars displaying substantially reduced levels of variability compared to G/K stars for any light-curve morphology. These properties suggest different magnetic field structures at the surface of early-type and later-type stars. We also detected a dearth of some disk-driven variability behaviors, particularly dippers, among stars earlier than G. This indicates that their higher surface temperatures and more chaotic magnetic fields prevent the formation and survival of inner disk dust structures corotating with the star. Finally, we examined the characteristic variability timescales within each light curve and determined that the day-to-week timescales are predominant over the K2 time series. These reflect distinct processes and locations in the inner disk environment, from intense accretion triggered by instabilities in the innermost disk regions to variable accretion efficiency in the outer magnetosphere.
56. 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.
57. Lynds' Catalogue of Bright Nebulae
ID:
ivo://CDS.VizieR/VII/9
Title:
Lynds' Catalogue of Bright Nebulae
Short Name:
VII/9
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Catalogue of Bright Nebulae lists the galactic and equatorial coordinates of the center of the cloud, the dimensions of the nebulae as measured on the photograph on which it appeared at its brightest, the area of nebulosity in square degrees, color as compared between the blue and red Palomar plates, a brightness index on a scale of 6, an identification number that indicates the complexity of the nebulosity, and a cross reference to NGC (Cat. <VII.1>), Index Catalogue (IC), Sharpless (1959) Catalogue of HII Regions (Cat. <VII/20>), Cederblad (1956) Catalogue of Diffuse Galactic Nebulae, and Dorschner and Gurtler (1963).
58. Lynds' Catalogue of Dark Nebulae (LDN)
ID:
ivo://CDS.VizieR/VII/7A
Title:
Lynds' Catalogue of Dark Nebulae (LDN)
Short Name:
VII/7A
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalog is an updated version from the published version. The catalog was based on the red and blue prints of the National Geographic - Palomar Observatory Sky Atlas. The catalog contains positions, both equatorial and galactic for the centers of dark nebulae. Values for the cloud sizes are given in square degrees, and estimates of their opacity are given. The updated catalog is ordered by galactic longitude and includes cross references to the published catalog and Barnard Object numbers associated with the clouds.
59. MAMMOTH-1 450 and 850um images
ID:
ivo://CDS.VizieR/J/A+A/620/A202
Title:
MAMMOTH-1 450 and 850um images
Short Name:
J/A+A/620/A202
Date:
21 Oct 2021
Publisher:
CDS
Description:
In the hierarchical model of structure formation, giant elliptical galaxies form through merging processes within the highest density peaks known as protoclusters. While high-redshift radio galaxies usually pinpoint the location of these environments, we have recently discovered at z~2-3 three enormous (>200kpc) Lyman-alpha nebulae (ELANe) that host multiple active galactic nuclei (AGN) and that are surrounded by overdensities of Lyman- emitters (LAE). These regions are prime candidates for massive protoclusters in the early stages of assembly. To characterize the star-forming activity within these rare structures - both on ELAN and protocluster scales - we have initiated an observational campaign with the James Clerk Maxwell Telescope (JCMT) and the Atacama Pathfinder EXperiment (APEX) telescopes. In this paper we report on sensitive SCUBA-2/JCMT 850 and 450um observations of a 128 arcmin^2^ field comprising the ELAN MAMMOTH-1, together with the peak of the hosting BOSS1441 LAE overdensity at z=2.32. These observations unveil 4.0+/-1.3 times higher source counts at 850um with respect to blank fields, likely confirming the presence of an overdensity also in obscured tracers. We find a strong detection at 850um associated with the continuum source embedded within the ELAN MAMMOTH-1, which - together with the available data from the literature - allow us to constrain the spectral energy distribution of this source to be of an ultra-luminous infrared galaxy (ULIRG) with a far-infrared luminosity of L^SF^_FIR_=2.4^+7.4^+_-2.1_x10^12^L_{sun}_, and hosting an obscured AGN. Such a source is thus able to power a hard photoionization plus outflow scenario to explain the extended Lyman-, HeII1640; and CIV1549 emission, and their kinematics. In addition, the two brightest detections at 850um (f_850_>18mJy) sit at the density peak of the LAEs; overdensity, likely pinpointing the core of the protocluster. Future multiwavelength and spectroscopic datasets targeting the full extent of the BOSS1441 overdensity have the potential to firmly characterize a cosmic nursery of giant elliptical galaxies, and ultimately of a massive cluster.
60. Merged catalogue of reflection nebulae
ID:
ivo://CDS.VizieR/J/A+A/399/141
Title:
Merged catalogue of reflection nebulae
Short Name:
J/A+A/399/141
Date:
21 Oct 2021
Publisher:
CDS
Description:
Several catalogues of reflection nebulae are merged to create a uniform catalogue of 913 objects. It contains revised coordinates, cross-identifications of nebulae and stars, as well as identifications with IRAS point sources.