Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/693/430   Near-IR photometry of Sh2-157 and Sh2-152         (Chen+, 2009)

Near-infrared imaging of the star-forming regions Sh2-157 and Sh2-152. Chen Y., Yao Y., Yang J., Zeng Q., Sato S. <Astrophys. J., 693, 430-446 (2009)> =2009ApJ...693..430C
ADC_Keywords: Photometry, infrared ; H II regions ; YSOs Keywords: ISM: individual (S152, S157) - ISM: jets and outflows - ISM: lines and bands - stars: formation Abstract: Near-infrared JHK' and H2ν=1-0S(1) imaging observations of the star-forming regions Sh2-157 and Sh2-152 are presented. The data reveal a cluster of young stars associated with H2 line emission in each region. Additionally, many IR point sources are found in the dense core of each molecular cloud. Most of these sources exhibit infrared color excesses typical of T Tauri stars, Herbig Ae/Be stars, and protostars. Several display the characteristics of massive stars. We calculate histograms of the K'-magnitude and [H-K'] color for all sources, as well as two-color and color-magnitude diagrams. The stellar populations inside and outside the clusters are similar, suggesting that these systems are rather evolved. Shock-driven H2 emission knots are also detected, which may be related to evident subclusters in an earlier evolutionary stage. Description: NIR images of Sh2-157 and Sh2-152 were taken under photometric conditions on 1999 October 30, and 1999 November 2. We used the OASIS instrument at the 1.88m telescope in Okayama Astronomical Observatory, Japan. OASIS is a NIR camera and spectrometer equipped with a NICMOS3 array. The field of view is 4.2'x4.2'. Three broad-band filters, J, H, and K' (2.16um) are employed for the observations, as well as a narrow-band filter centered on the H2 line (2.12um) File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 45 369 Near-infrared photometry of Sh2-152 table3.dat 45 405 Near-infrared photometry of Sh2-157
See also: J/other/PASA/26.439 : K-band images of star-forming regions (Longmore+, 2009) J/MNRAS/390/1185 : JHK photometry in 2 star-forming regions (Anandarao+, 2008) J/ApJ/596/1064 : JHKs photometry of S269 (Jiang+, 2003) Byte-by-byte Description of file: table1.dat table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- NIRS Running sequence number (<[CYY2009] Sh 2-15[27] NIRS NNN> in Simbad) 5- 6 I2 h RAh Hour of right ascension (J2000) 8- 9 I2 min RAm Minute of right ascension (J2000) 11- 15 F5.2 s RAs Second of right ascension (J2000) 17 A1 --- DE- Declination sign (J2000) 18- 19 I2 deg DEd Degree of declination (J2000) 21- 22 I2 arcmin DEm Arcminute of declination (J2000) 24- 28 F5.2 arcsec DEs Arcsecond of declination (J2000) 29- 33 F5.2 mag K'mag OASIS K'-band magnitude (2.16um) 35- 39 F5.2 mag H-K' ? OASIS H-K' color index (1) 41- 45 F5.2 mag J-H ? OASIS J-H color index
Note (1): The sources are arranged in order of [H-K']. Among them NIRS 1-210 (in table 1) and NIRS 1-227 (in table 3) belong to the circle and the rest, out of it.
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 09-Mar-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact