- ID:
- ivo://CDS.VizieR/J/A+A/394/225
- Title:
- JHK photometry around RAFGL 7009S
- Short Name:
- J/A+A/394/225
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- RAFGL7009S is a deeply embedded massive young stellar objet (YSO) showing strong ice and saturated silicate absorption features in the mid infrared. It is associated with the ultracompact H II region G25.65+1.05, which may be excited by a B1V star. We have obtained JHK images of a 1' field centred on this YSO. In K we detect a non-resolved object coinciding with the radio continuum emission peak. Considering the high extinction towards this source (A_V_>=100mag), the observed K emission is more than 7~mag in excess of that expected for a B1V star. We suggest that this emission is mainly due to scattering of the central zone emission, as recently found for a sample of embedded massive YSOs associated with 3.1{mu}m H_2_O ice absorption (Ishii et al., 2002AJ....124..430I). We estimate the YSO's age to be 2x10^4^ years. The outflow, the methanol maser emission and the strong ice absorption features suggest the presence of a dense medium very close to the star, possibly a disk. The observations were obtained with the Montreal Near-IR Camera (MONICA, Nadeau et al., 1994PASP..106..909N) mounted at the F/8 Cassegrain focus of the 3.6-m Canada-France-Hawaii Telescope on 1996 July 1 UT. Frames were obtained through the J, H and K broad-band filters with total integration times of 840s, 160s and 100s Details about the instrumentation, the calibration and the data analysis can be found in Deharveng et al. (1999, Cat. <J/A+A/344/943>).
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/399/1135
- Title:
- JHK photometry around Sh 217 and Sh 219
- Short Name:
- J/A+A/399/1135
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- These Tables give the J2000 coordinates and JHK photometry of the stars in a 3.5'x3.5' field centred on Sh 219 (table3.dat) and a 3.1'x3.2' field centred on Sh 217 (table4.dat).
- ID:
- ivo://CDS.VizieR/J/A+A/361/660
- Title:
- JHK photometry around S233IR
- Short Name:
- J/A+A/361/660
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Observed properties of sources in the region S233IR in a field of 3.1 arcmin by 3.1 arcmin, which contains two young stellar clusters located to the northeast (NE) and southwest (SW) of the field center (RA = 05 35 49.79, DE = +35 44 01.9). Source positions, JHK photometry, extinction and estimated stellar mass are provided.
- ID:
- ivo://CDS.VizieR/J/AJ/110/2788
- Title:
- JHK photometry for Galactic bulge stars
- Short Name:
- J/AJ/110/2788
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present deep near-IR photometry for Galactic bulge stars in Baade's Window, (l, b)=(1.0deg, -3.9deg), and another minor axis field at (l, b)=(0deg, -6deg). We combine our data with previously published photometry and construct a luminosity function over the range 5.5=<K0=<16.5, deeper than any previously published. The slope of this luminosity function and the magnitude of the tip of the first ascent giant branch are consistent with theoretical values derived from isochrones with appropriate age and metallicity. We use the relationship between [Fe/H] and the giant branch slope derived from near-IR observations of metal-rich globular clusters by Kuchinski et al. (1995AJ....109.1131K) to calculate the mean metallicity for several bulge fields along the minor axis.
- ID:
- ivo://CDS.VizieR/J/MNRAS/365/439
- Title:
- JHK photometry for UKIRT faint galaxies
- Short Name:
- J/MNRAS/365/439
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a multicolour catalogue of faint galaxies situated close to bright stars, V<15, with the aim of identifying high-redshift galaxies suitable for study with adaptive optics-equipped near-infrared imagers and spectrographs. The catalogue is constructed from archival calibration observations of the United Kingdom Infrared Telescope (UKIRT) Faint Standard stars with the UKIRT Fast Track Imager (UFTI) camera on UKIRT. We have analysed the deepest 16 fields from the archive to provide a catalogue of galaxies brighter than K~20.3 lying between 3 and 25-arcsec of the guide stars. We identify 111 objects in a total survey area of 8.7arcmin^2^. Of these, 87 are classified as galaxies based on their light profiles in our ~0.5arcsec median seeing K-band images. 12 of the galaxies have (J-K)>~2.0 consistent with them lying at high redshifts, z>~2. These 12 very red galaxies have K-band magnitudes of K=18.1-20.1 and separations from the guide stars of 4-20arcsec and hence are very well suited to adaptive optics studies to investigate their morphologies and spectral properties on sub-kpc scales. We provide coordinates and JHK photometry for all catalogued objects.
1326. JHK photometry in Cha I
- ID:
- ivo://CDS.VizieR/J/AJ/121/974
- Title:
- JHK photometry in Cha I
- Short Name:
- J/AJ/121/974
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We describe a near-infrared imaging survey covering ~1deg^2^ of the Chamaeleon I dark cloud. The survey is complete for K<15.0, H<16.0, and J<16.5, roughly 2 magnitudes more sensitive than previous large-scale surveys. We use the large number of background stars detected to derive an accurate near-infrared extinction law for the cloud and select new candidate members with near-infrared color excesses. We list ~100 candidates of the cloud with K>=2.0, based on their positions in the J-H, H-K color-color diagram. These new stars have low luminosities (K~12-16, H-K>~0.5-1.5) and may have masses close to or even below the hydrogen-burning limit.
- ID:
- ivo://CDS.VizieR/J/PASP/120/150
- Title:
- JHK photometry in Cluster [BDS2003] 107
- Short Name:
- J/PASP/120/150
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present new near-infrared classification spectra for nine candidate members of the galactic cluster [BDS2003] 107 (Cluster 107) observed with the IRTF SpeX instrument. We can spectroscopically classify at least three members, two of which have published 2MASS photometry. These two stars provide preliminary values for the approximate age (10^6^yr), distance (<=2kpc), and extinction (A_V_~23) of the young cluster. Based on the properties of the brightest members we have identified, on the surface Cluster 107 appears to be very similar to the well-studied Orion cluster. We find a single mid-O dwarf star and a number of early-B stars, along with massive young stellar objects (YSOs) in the field. The massive YSO Star 63 shows simultaneously an early-B spectral classification in the short K-band with CO band-head emission at 2.3um. This massive YSO looks similar to other luminous CO emission objects seen in young, massive clusters through out the Galaxy and provides additional evidence for the existence of circumstellar disks around even fairly massive stars. Several previously identified radio sources, presumably associated with very early star formation, lie within this field, three of which appear to have near-infrared counterparts as detected in images we obtained with the SpeX acquisition camera.
- ID:
- ivo://CDS.VizieR/J/AJ/145/113
- Title:
- JHK photometry in Cyg OB7. II. Variable stars
- Short Name:
- J/AJ/145/113
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a subset of the results of a three-season, 124 nights, near-infrared monitoring campaign of the dark clouds Lynds 1003 and Lynds 1004 in the Cygnus OB7 star-forming region. In this paper, we focus on the field star population. Using three seasons of UKIRT J, H, and K-band observations spanning 1.5 years, we obtained high-quality photometry on 9200 stars down to J=17mag, with photometric uncertainty better than 0.04mag. After excluding known disk-bearing stars we identify 149 variables-1.6% of the sample. Of these, about 60 are strictly periodic, with periods predominantly <2days. We conclude this group is dominated by eclipsing binaries. A few stars have long period signals of between 20 and 60 days. About 25 stars have weak modulated signals, but it was not clear if these were periodic. Some of the stars in this group may be diskless young stellar objects with relatively large variability due to cool starspots. The remaining ~60 stars showed variations which appear to be purely stochastic.
- ID:
- ivo://CDS.VizieR/J/MNRAS/359/2
- Title:
- JHK photometry in G173.58+2.45
- Short Name:
- J/MNRAS/359/2
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a multi-epoch infrared photometric study of the intermediate-mass star-forming region G173.58+2.45. Photometric observations are obtained using the near-infrared JHKL'M' filters and narrow-band filters centred at the wavelengths of the H_2_(1-0)S(1)(2.122um) and [FeII](1.644um) lines. The H2 image shows molecular emission from shocked gas, implying the presence of multiple star formation and associated outflow activity. We see evidence for several collimated outflows.
- ID:
- ivo://CDS.VizieR/J/other/ChA+A/28.308
- Title:
- JHK' photometry in GGD 12-15 region
- Short Name:
- J/other/ChA+A/28
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Near infrared imaging observations in JHK broad bands and H_2_ v=1-0 S(1) narrow band of the star formation region GGD12-15 are presented in this article. The images reveal young compact infrared clusters and infrared nebulae in association with infrared sources, as well as outflow activities characterized by H_2_ emission knots. Most of the infrared point sources are invisible in the optical wave band. The JHK' photometric results of 76 infrared point sources contain 32 with infrared excess, and 5 with the characteristics of protostars, indicating very active star formation activities in the molecular clouds.
