Optical and Near-infrared survey of the stellar contents associated with the star-forming Complex Sh2-252

Abstract

We present the analyses of the stellar contents associated with the HII region Sh2-252 using UBVRI photometry, slit and slitless spectroscopy along with the NIR data from 2MASS for an area ~1 degree x 1 degree. We studied the sub-regions of Sh2-252 which includes four compact-HII (CHII) regions, namely A, B, C and E and two clusters NGC 2175s and Teutsch 136 (Teu 136). Of the fifteen spectroscopically observed bright stars, eight have been identified as massive members of spectral class earlier than B3. From the spectro-photometric analyses, we derived the average distance of the region as 2.4+/-0.2 kpc and the reddening of the massive members is found to vary between 0.35 to 2.1 mag. We found that NGC 2175s and Teu 136, located towards the eastern edge of the complex are the sub-clusters of Sh2-252. The stellar surface density distribution in K-band shows clustering associated with the regions A, C, E, NGC 2175s and Teu 136. We have also identified the candidate ionizing sources of the CHII regions. 61 H_alpha emission sources are identified using slitless spectroscopy. The distribution of the H_alpha emission sources and candidate YSOs with IR excess on the V/(V-I) CMD shows that a majority of them have approximate ages between 0.1 - 5 Myr and masses in the range of 0.3 - 2.5 M_sun. The CMDs of the candidate YSOs in the individual regions also show an age spread of 0.1 - 5 Myr for each of them. We calculated the KLFs for the sub-regions A, C, E, NGC 2175s and Teu 136. Within errors, the KLFs for all the sub-regions are found to be similar and comparable to that of young clusters of age < 5 Myr. We also estimated the mass functions (MFs) of the PMS sample of the individual regions in the mass range of 0.3 - 2.5 M_sun. In general, the slopes of the MFs of all the sub-regions are found comparable to the Salpeter value.

published in MNRAS

References in corpus (9)

• A Spitzer Survey of Young Stellar Clusters within One Kiloparsec of the Sun: Cluster Core Extraction and Basic Structural Analysis
• The Photoevaporation of Discs Around Young Stars in Massive Clusters
• Star formation in young star cluster NGC 1893
• Automated search for galactic star clusters in large multiband surveys: I. Discovery of 15 new open clusters in the Galactic anticenter region
• Stellar contents and star formation in the young open cluster Stock 8
• Stellar contents and star formation in the young star cluster Be 59
• Near-infrared Study of the Carina Nebula
• The population in the background of open clusters: Tracer of the Norma-Cygnus arm
• A multiwavelength study of the massive star forming region IRAS 06055+2039 (RAFGL 5179)

Cited by in corpus (7)

• A multiwavelength study of embedded clusters in W5-east, NGC7538, S235, S252 and S254-S258
• Tracers of Dense Gas in the Outer Galaxy
• Molecular gas toward the Gemini OB1 Giant Molecular Cloud Complex I: Observation data
• Sh 2-301: a blistered H II region undergoing star formation
• Investigation of the stellar content in the IRAS 05168+3634 star-forming region
• Infrared study of the star-forming region associated with the UC HII regions G45.07+0.13 and G45.12+0.13
• A Young Eclipsing Binary and its Luminous Neighbors in the Embedded Star Cluster Sh 2-252E