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To probe the star formation process, we present an observational investigation of the Pillar IV and an ionized knot HH 216 in the Eagle Nebula (M16). Pillar IV is known to host a Class I protostar that drives a bipolar outflow. The outflow…

Astrophysics of Galaxies · Physics 2024-01-12 L. K. Dewangan , O. R. Jadhav , A. K. Maity , N. K. Bhadari , Saurabh Sharma , M. Padovani , T. Baug , Y. D. Mayya , Rakesh Pandey

Supernova explosions attributed to the unseen companion in several binary systems identified by the Third Gaia Data Release (Gaia DR3) may be responsible for a number of well-known and well-studied features in the radio sky, including the…

Solar and Stellar Astrophysics · Physics 2023-11-01 J. T. Schmelz , G. L. Verschuur , A. Escorza , A. Jorissen

We have obtained high resolution FUSE and HST/STIS echelle observations of the quasar PG 1116+215. The semi-continuous coverage of the ultraviolet spectrum over the wavelength range 916-2800 provides detections of Galactic and high velocity…

Astrophysics · Physics 2009-11-10 Rajib Ganguly , Kenneth R. Sembach , Todd M. Tripp , Blair D. Savage

The Integral Shaped Filament (ISF) is the nearest molecular cloud with rapid star formation, including massive stars, and it is therefore a star-formation laboratory. We use Gaia parallaxes, to show that the distances to young Class II…

Astrophysics of Galaxies · Physics 2018-08-01 Amelia M. Stutz , Valentina I. Gonzalez-Lobos , Andrew Gould

We present 870 um polarimetric observations toward 61 protostars in the Orion molecular clouds, with ~400 au (1") resolution using the Atacama Large Millimeter/submillimeter Array. We successfully detect dust polarization and outflow…

Bright-rimmed, cometary-shaped star-forming globules, associated with HII regions, are remnants of compressed molecular shells exposed to ultraviolet radiation from central OB-type stars. The interplay between dense molecular gas and…

Astrophysics of Galaxies · Physics 2025-05-15 S. Aardra , Namitha Issac , Archana Soam , Blesson Mathew , Chang Won Lee

Despite their close proximity, the complex interplay between the two Magellanic Clouds, the Milky Way, and the resulting tidal features, is still poorly understood. Recent studies have shown that the Large Magellanic Cloud (LMC) has a very…

In this work, we study the magnetic field morphology of selected star-forming clouds spread over the galactic latitude ($b$) range, $-10^\circ$ to $10^\circ$. The polarimetric observation of clouds CB24, CB27 and CB188 are conducted to…

Astrophysics of Galaxies · Physics 2022-06-22 Gulafsha B. Choudhury , Himadri S. Das , B. J. Medhi , J. C. Pandey , S. Wolf , T. K. Dhar , A. M. Mazarbhuiya

We have analyzed new CO($J$ = 1-0) data in the region of a reflection nebula NGC 2023 with a particular focus on the detailed kinematical properties of the molecular gas. The results show that there are two velocity components which…

Astrophysics of Galaxies · Physics 2021-07-07 R. Yamada , R. Enokiya , H. Sano , S. Fujita , M. Kohno , D. Tsutsumi , A. Nishimura , K. Tachihara , Y. Fukui

We have studied the environment of the FU Ori type star V582 Aur. Our aim is to explore the star-forming region associated with this young eruptive star. Using slitless spectroscopy we searched for H alpha emission stars within a field of…

Solar and Stellar Astrophysics · Physics 2017-04-19 Maria Kun , Elza Szegedi-Elek , Bo Reipurth

The new Gaia data release (EDR3) with improved astrometry has opened a new era in studying our Milky Way in fine detail. We use Gaia EDR3 astrometry together with 2MASS and WISE photometry to study two of the most massive molecular clouds…

Astrophysics of Galaxies · Physics 2022-05-25 Sara Rezaei Kh. , Jouni Kainulainen

We wish to map the magnetic field geometry and to study the dust properties of the starless cloud, L1570, using multi-wavelength optical polarimetry and photometry of the stars projected on the cloud. We made R-band imaging polarimetry of…

Solar and Stellar Astrophysics · Physics 2015-06-16 C. Eswaraiah , G. Maheswar , A. K. Pandey , J. Jose , A. N. Ramaprakash , H. C. Bhatt

We aim to investigate the impact of the ionized radiation from the M16 HII region on the surrounding molecular cloud and on its hosted star formation. To present comprehensive multi-wavelength observations towards the M16 HII region, we…

The Orion Nebula Cluster (ONC) is the most massive region of active star formation within a kpc of the Sun. Using Gaia DR3 parallaxes and proper motions, we examine the bulk motions of stars radially and tangentially relative to the cluster…

Astrophysics of Galaxies · Physics 2022-10-05 Marina Kounkel , Keivan G. Stassun , Kevin Covey , Lee Hartmann

Using the IRAM 30m telescope we have surveyed a $1\times0.8^{\circ}$ part of the Orion molecular cloud in the $^{12}$CO and $^{13}$CO (2-1) lines with a maximal spatial resolution of $\sim$11" and spectral resolution of $\sim$ 0.4…

Astrophysics of Galaxies · Physics 2015-06-22 Olivier Berne , Nuria Marcelino , Jose Cernicharo

This work extends previous kinematic studies of young stars in the Head of the Orion A cloud (OMC-1/2/3/4/5). It is based on large samples of infrared, optical, and X-ray selected pre-main sequence stars with reliable radial velocities and…

Astrophysics of Galaxies · Physics 2019-06-05 K. V. Getman , E. D. Feigelson , M. A. Kuhn , G. P. Garmire

We have carried out an in-depth study of three bright-rimmed clouds SFO 11, SFO 11NE and SFO 11E associated with the HII region IC 1848, using observations carried out at the James Clerk Maxwell Telescope (JCMT) and the Nordic Optical…

We present near-IR imaging polarimetry of five classical FU Ori-type objects (FU Ori, V1057 Cyg, V1515 Cyg, V1735 Cyg, Z CMa) with a $\sim$0\farcs1 resolution observed using HiCIAO+AO188 at Subaru Telescope. We observed scattered light…

Integral field unit (IFU) data of the iconic Pillars of Creation in M16 are presented. The ionisation structure of the pillars was studied in great detail over almost the entire visible wavelength range, and maps of the relevant physical…

Solar and Stellar Astrophysics · Physics 2015-09-02 A. F. Mc Leod , J. E. Dale , A. Ginsburg , B. Ercolano , M. Gritschneder , S. Ramsay , L. Testi

Using the infrared photometry data extracted from the 2MASS, IRAS and MSX databases, 50 suspected young stellar objects (YSOs) are selected from about 37500 infrared objects in the 3x3 deg area with the center at Galactic longitude 142.5…

Astrophysics · Physics 2009-06-25 V. Straizys , V. Laugalys