- ID:
- ivo://CDS.VizieR/J/MNRAS/380/1497
- Title:
- JHKs & GLIMPSE photometry towards G305.2+0.2
- Short Name:
- J/MNRAS/380/1497
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present deep, wide field J, H and Ks images taken with Infrared Imager and Spectrometer 2 (IRIS2) on the Anglo-Australian Telescope, towards the massive star formation region G305.2+0.2. Combined with 3.6, 4.5, 5.8 and 8.0um data from the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) survey on the Spitzer Space Telescope, we investigate the properties of the embedded stellar populations. After removing contamination from foreground stars, we separate the sources based on their infrared (IR) colour. Strong extended emission in the GLIMPSE images hampers investigation of the most embedded sources towards the known sites of massive star formation. However, we find a sizeable population of IR excess sources in the surrounding region free from these completeness effects. Investigation reveals the recent star formation activity in the region is more widespread than previously known.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/MNRAS/385/1045
- Title:
- JHKsIc photometry of AGB in Phoenix dwarf gal.
- Short Name:
- J/MNRAS/385/1045
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- JHKs near-infrared photometry of stars in the Phoenix dwarf galaxy is presented and discussed. Combining these data with the optical photometry of Massey et al. (2007, Cat. <J/AJ/133/2393>) allows a rather clean separation of field stars from Phoenix members. The discovery of a Mira variable (P=425d), which is almost certainly a carbon star, leads to an estimate of the distance modulus of 23.10+/-0.18 that is consistent with other estimates and indicates the existence of a significant population of age ~2Gyr. The two carbon stars of Da Costa have Mbol=-3.8 and are consistent with belonging to a population of similar age; some other possible members of such a population are identified. A Da Costa non-carbon star is {Delta}Ks~0.3mag brighter than these two carbon stars. It may be an asymptotic giant branch star of the dominant old population. The nature of other stars lying close to it in the Ks, (J-Ks) diagram needs studying.
- ID:
- ivo://CDS.VizieR/J/A+A/470/231
- Title:
- JHKsIL' images of IRAS 06468-0325
- Short Name:
- J/A+A/470/231
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Our new near-infrared J and Ks-band images taken towards IRAS 06468-0325 revealed the presence of extended emission with very unusual and enigmatic morphology: that of a diamond-ring, that is, a ring or torus with a bright source overlaping the edge of it (not inside it). We report the discovery of this source, explore its nature, and propose possible interpretations of its morphological structure. We observed IRAS 06468-0325 obtaining optical and infrared images through IJHKs and L' filters, K-band low-resolution spectroscopy, together with millimetre line observations of CO(1-0), ^13^CO(2-1), C^18^O(2-1), and CS(2-1).
- ID:
- ivo://CDS.VizieR/J/A+A/511/A50
- Title:
- JHks of GOODS-South field
- Short Name:
- J/A+A/511/A50
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the final public data release of the VLT/ISAAC near-infrared imaging survey in the GOODS-South field. The survey covers an area of 172.5, 159.6 and 173.1arcmin^2^ in the J, H, and Ks bands, respectively. For point sources total limiting magnitudes of J=25.0, H=24.5, and Ks=24.4 (5{sigma}, AB) are reached within 75% of the survey area. Thus these observations are significantly deeper than the previous EIS Deep Public Survey which covers the same region. The image quality is characterized by a point spread function ranging between 0.34" and 0.65" FWHM. The images are registered to a common astrometric grid defined by the GSC 2 with an accuracy of ~0.06" RMS over the whole field. The overall photometric accuracy, including all systematic effects, adds up to 0.05mag. The data are publicly available from the ESO science archive facility.
- ID:
- ivo://CDS.VizieR/J/A+A/459/669
- Title:
- JHKs photometry around {alpha} Cen
- Short Name:
- J/A+A/459/669
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- alpha Centauri is our closest stellar neighbor, at a distance of only 1.3pc, and its two main components have spectral types comparable to the Sun. This is therefore a favorable target for an imaging search for extrasolar planets. Moreover, indications exist that the gravitational mass of alpha Cen B is higher than its modeled mass, the difference being consistent with a substellar companion of a few tens of Jupiter masses. We searched for faint comoving companions to alpha Cen B. As a secondary objective, we built a catalogue of the detected background sources. We used the NACO adaptive optics system of the VLT in the J, H, and Ks bands to search for companions to alpha Cen B. This instrument allowed us to achieve a very high sensitivity to point-like sources, with a limiting magnitude of m_Ks~18 at 7" from the star. We complemented this data set with archival coronagraphic images from the HST-ACS instrument to obtain an accurate astrometric calibration.
- ID:
- ivo://CDS.VizieR/J/AJ/135/2095
- Title:
- JHKs photometry in AFGL 437, 5180 and 5142
- Short Name:
- J/AJ/135/2095
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We investigate three embedded massive star-forming regions using the Near-Infrared Imager (NIRIM) camera on the 3.5m WIYN telescope. We report J-, H-, and K'-band photometry in the clusters AFGL437, AFGL5180, and AFGL5142, and use these results to probe the stellar populations, extinction, and ages of the clusters.
- ID:
- ivo://CDS.VizieR/J/AJ/130/1719
- Title:
- JHKs photometry in G305.3+0.2 cluster region
- Short Name:
- J/AJ/130/1719
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present near-IR (NIR) J, H, and Ks images and K-band spectroscopy of two newly discovered stellar clusters at different stages of evolution. Our spectra suggest the presence of massive young stellar objects in the heavily embedded cluster in the star-forming region near radio source G353.4-0.4 and an O5-O6V star in the cluster near radio source G305+00.2.
- ID:
- ivo://CDS.VizieR/J/AJ/125/1940
- Title:
- JHKs photometry in LMC HII region N11B
- Short Name:
- J/AJ/125/1940
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The second largest H II region in the Large Magellanic Cloud, N11B (LHA 120-N 11B) has been surveyed in the near-IR. We present JHKs images of the N11B nebula. These images are combined with CO (1->0) emission-line data and with archival New Technology Telescope and Hubble Space Telescope WFPC2 optical images to address the star formation activity of the region. IR photometry of all the IR sources detected is given. We confirm that a second generation of stars is currently forming in the N11B region. Our IR images show the presence of several bright IR sources that appear to be located toward the molecular cloud as seen from the CO emission in the area.
- ID:
- ivo://CDS.VizieR/J/A+A/422/129
- Title:
- JHKs photometry in N159 (LMC)
- Short Name:
- J/A+A/422/129
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We study the Large Magellanic Cloud Papillon Nebula (N 159-5), a conspicuous High Excitation Blob (HEB) lying in the star forming complex N 159. Using JHK near-infrared photometry obtained at the ESO VLT with the ISAAC camera, we examine the stellar populations associated with the Papillon, tracing their history using stellar evolution models. Two populations are revealed: one composed of young, massive stars with an age ~3Myr, and a second consisting of older lower mass stars of age spreading between 1 and 10Gyr. We analyze the properties of those populations and discuss their significance in the context of N 159. We also estimate that if the star at the center of the Papillon is single its initial mass is ~50 solar masses and it is affected by an extinction Av~7mag.
2420. JHKs photometry in ONC
- ID:
- ivo://CDS.VizieR/J/AJ/139/950
- Title:
- JHKs photometry in ONC
- Short Name:
- J/AJ/139/950
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present J, H, and Ks photometry of the Orion Nebula Cluster (ONC) obtained at the CTIO/Blanco 4m telescope at Cerro Tololo with the Infrared Side Port Imager camera. From the observations we have assembled a catalog of about ~7800 sources distributed over an area of approximately 30'x40', the largest of any survey deeper than the Two Micron All Sky Survey (2MASS) in this region. The catalog provides absolute coordinates accurate to about 0.15-arcsec and 3{sigma} photometry in the 2MASS system down to J~=19.5mag, H~=18.0mag, Ks~=18.5mag, enough to detect planetary size objects 1Myr old under A_V_~=10mag of extinction at the distance of the Orion Nebula.
