168 citations · 1.7k across the 41 of their papers we have counts for
14 papers · 1 filter
A census of molecular hydrogen outflows and their sources along the Orion A molecular ridge: characteristics and overall distribution
C. J. Davis, D. Froebrich, T. Stanke +9
We present wide-field near-IR images of Orion A. K and H2 1-0S(1) images of a contiguous 8 sqr degree region are compared to photometry from Spitzer and dust-continuum maps obtaine…
Spitzer--IRAC Imagery and Photometry of Ultracompact HII Regions With Extended Emission
E. de la Fuente, A. Porras, J. M. C. Grave +6
We present the results of a morphological study performed to a sample of Ultracompact (UC) HII regions with Extended Emission (EE) using Spitzer--IRAC imagery and 3.6 cm VLA conf.…
The structures of embedded clusters in the Perseus, Serpens and Ophiuchus molecular clouds
S. Schmeja, M. S. N. Kumar, B. Ferreira
The young stellar population data of the Perseus, Ophiuchus and Serpens molecular clouds are obtained from the Spitzer c2d legacy survey in order to investigate the spatial structu…
Spitzer-IRAC GLIMPSE of High Mass Protostellar Objects
M. S. N. Kumar, J. M. C. Grave
The Spitzer-GLIMPSE point source catalog and images have been used to study a sample of 381 massive protostellar candidates. IRAC-Point source photometry was used to analyse colour…
The Extended Emission of Ultracompact HII Regions: An Overview and New Observations
Eduardo de la Fuente Acosta, Stanley E. Kurtz, M. S. N. Kumar +3
Here we present a brief overview of UC HII regions with EE (UC HII+EE) including our most recent effort aimed at searching for UC HII regions associated with extended emission.
The spatial distribution of substellar objects in IC348 and the Orion Trapezium Cluster
M. S. N. Kumar, S. Schmeja
Aims: Some theoretical scenarios suggest the formation of brown dwarfs as ejected stellar embryos in star-forming clusters. Such a formation mechanism can result in different spati…
Spitzer-IRAC GLIMPSE of high mass protostellar objects. I Infrared point sources and nebulae
M. S. N. Kumar, J. M. C. Grave
The GLIMPSE archive was used to obtain 3.6--8.0micron, point source photometry and images for 381 massive protostellar candidates lying in the Galactic mid-plane. The colours, magn…
Probing the close environment of massive young stars with spectro-astrometry
J. M. C. Grave, M. S. N. Kumar
Aims: We test the technique of spectro-astrometry as a potential method to investigate the close environment of massive young stars. Method: Archival VLT near infrared K band spect…
WFCAM, Spitzer-IRAC and SCUBA observations of the massive star forming region DR21/W75: II. Stellar content and star formation
M. S. N. Kumar, C. J. Davis, J. M. C. Grave +2
Wide field near-infrared observations and Spitzer Space Telescope IRAC observations of the DR21/W75 star formation regions are presented. The photometric data are used to analyse t…
Star formation in the vicinity of the IC 348 cluster
M. Tafalla, M. S. N. Kumar, R. Bachiller
Aims. We present molecular line observations of the southwestern part of the IC 348 young cluster, and we use them together with NIR and mm continuum data to determine the distribu…
The Youngest Stellar clusters Clusters associated with massive protostellar candidates
M. S. N. Kumar, E. Keto, E. Clerkin
We report on the identification of 54 embedded clusters around 217 massive protostellar candidates of which 34 clusters are new detections. The embedded clusters are identified as…
The structure of Onsala 1 star forming region
M. S. N. Kumar, M. Tafalla, R. Bachiller
We present new high-sensitivity high-resolution mm-wave observations of the Onsala 1 ultra-compact HII region that bring to light the internal structure of this massive star formin…
A Ring Shaped Embedded Young Stellar (Proto)Cluster
M. S. Nanda Kumar, D. K. Ojha, C. J. Davis
We present sub-arcsec (FWHM ~ 0.5") J, H, K and L' images of a young stellar cluster associated with a candidate massive protostar IRAS22134+5834. The observations reveal a central…
Cometary molecular clouds around RNO6. On-going star formation near the double cluster h and chi Persei
R. Bachiller, A. Fuente, M. S. N. Kumar
We present molecular line observations of the star-forming cloud around RNO6 along with a newly discovered nearby molecular cloud that we name RNO6NW. Both clouds display striking…