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A revised catalogue of Galactic supernova remnants (SNRs) is presented, along with some simple statistics of their properties. Six new SNRs have been added to the catalogue since the previous published version from 2014, and six entries…

Astrophysics of Galaxies · Physics 2019-09-04 D. A. Green

A revised catalogue of 294 Galactic supernova remnants (SNRs) is presented, along with some simple statistics. This catalogue has twenty more entries than did the previous version (from 2009), as 21 new remnants have been added, and one…

High Energy Astrophysical Phenomena · Physics 2015-08-17 D. A. Green

Recent evidence of a young progenitor population for many Type-Ia SNe (SNe-Ia) raises the possibility that evolved intermediate-mass progenitor stars may be detected in pre-explosion images. NGC 1316, a radio galaxy in the Fornax cluster,…

Astrophysics · Physics 2009-11-13 Dan Maoz , Filippo Mannucci

We compile a catalog of 578 highly probable and 62 likely red supergiants (RSGs) of the Milky Way, which represents the largest list of Galactic RSG candidates designed for continuous follow-up to date. We match distances measured by Gaia…

Solar and Stellar Astrophysics · Physics 2024-05-08 Sarah Healy , Shunsaku Horiuchi , Marta Colomer Molla , Dan Milisavljevic , Jeff Tseng , Faith Bergin , Kathryn Weil , Masaomi Tanaka

We present a Giant Molecular Cloud (GMC) catalog toward M33, containing 71 GMCs in total, based on wide field and high sensitivity CO(J=3-2) observations with a spatial resolution of 100 pc using the ASTE 10 m telescope. Employing archival…

We have used the Karl G. Jansky Very Large Array (VLA) to search for 36 GHz and 44 GHz methanol (CH3OH) lines in a sample of 21 Galactic supernova remnants (SNRs). Mainly the regions of the SNRs with 1720 MHz OH masers were observed.…

Astrophysics of Galaxies · Physics 2015-06-18 Y. M. Pihlström , L. O. Sjouwerman , D. A. Frail , M. J. Claussen , R. A. Mesler , B. C. McEwen

We present molecular spectroscopy toward 50 Galactic supernova remnants (SNRs) taken at millimeter wavelengths in 12CO and 13CO J=2-1 with the Heinrich Hertz Submillimeter Telescope as part of a systematic survey for broad molecular line…

Solar and Stellar Astrophysics · Physics 2016-01-20 Charles D. Kilpatrick , John H. Bieging , George H. Rieke

We present high angular resolution Submillimeter Array (SMA) and Karl G. Jansky Very Large Array (VLA) observations of the massive protocluster G18.67+0.03. Previously targeted in maser surveys of GLIMPSE Extended Green Objects (EGOs), this…

Astrophysics of Galaxies · Physics 2015-06-11 C. J. Cyganowski , C. L. Brogan , T. R. Hunter , Q. Zhang , R. K. Friesen , R. Indebetouw , C. J. Chandler

(Abridged) We have obtained HST WFPC2 observations of three very luminous but morphologically different giant HII regions (GHRs) in M101, NGC5461, NGC5462, and NGC5471, in order to study cluster formation in GHRs. The measured (M_F547M -…

Astrophysics · Physics 2009-11-10 C. -H. Rosie. Chen , You-Hua Chu , Kelsey E. Johnson

The circumnuclear starburst of M83 (NGC 5236), the nearest such example (4.6 Mpc), constitutes an ideal site for studying the massive star IMF at high metallicity (12+log[O/H]=9.1$\pm$0.2, Bresolin & Kennicutt 2002). We analyzed archival…

Astrophysics of Galaxies · Physics 2010-11-16 Aida Wofford , Rupali Chandar , Claus Leitherer

In the past few years, several clusters containing large numbers of red supergiants have been discovered. These clusters are amongst the most massive young clusters known in the Milky Way, with stellar masses reaching a few…

Solar and Stellar Astrophysics · Physics 2018-03-21 Ignacio Negueruela

<Context.> Nuclear star clusters (NSCs) at the dynamical center of galaxies appear to have a complex star formation history. This suggests repeated star formation even in the influence of the strong tidal field from supermassive black…

Astrophysics of Galaxies · Physics 2016-03-16 Shogo Nishiyama , Rainer Schoedel , Tatsuhito Yoshikawa , Tetsuya Nagata , Yosuke Minowa , Motohide Tamura

We present color magnitude diagrams of four blue massive and compact star clusters in M31: G38, G44, G94, and G293. The diagrams of the four clusters reveal a well-populated upper main sequence and various numbers of supergiants. The U-B…

Astrophysics · Physics 2009-10-31 Benjamin F. Williams , Paul W. Hodge

Analyzing the high-resolution CO-line survey of the Galactic plane with the Nobeyama 45-m telescope (FUGIN), we show that the star-forming complex G18.15-0.30+51 (G18) at radial velocity of 51 \kms is {a tight triple association of a giant…

Astrophysics of Galaxies · Physics 2023-08-16 Yoshiaki Sofue

We investigate the young (proto)stellar population in NGC 2023 and the L 1630 molecular cloud bordering the HII region IC 434, using Spitzer IRAC and MIPS archive data, JCMT SCUBA imaging and spectroscopy as well as targeted BIMA…

Astrophysics of Galaxies · Physics 2015-05-14 B. Mookerjea , G. Sandell , T. H. Jarrett , J. P. McMullin

We present the results of a cluster search in the gamma-ray sky images of the Large Magellanic Cloud (LMC) region by means of the Minimum Spanning Tree (MST) and DBSCAN algorithms, at energies higher than 6 and 10 GeV, using 12 years of…

High Energy Astrophysical Phenomena · Physics 2022-07-13 R. Campana , E. Massaro , F. Bocchino , M. Miceli , S. Orlando , A. Tramacere

Young star clusters consisting of massive stars are the ideal sites to study the star formation processes and influence of massive stars on the subsequent star formation. NGC 1893 is a young star cluster associated with the HII region…

Solar and Stellar Astrophysics · Physics 2022-02-09 Neelam Panwar , Amit Kumar , S. B. Pandey

We present sub-arcsecond (0.35"-0.9"), near-infrared J,H,K band photometric observations of six fields along the W51 Giant Molecular Cloud (W51 GMC). Our observations reveal four new, embedded clusters and provide a new high-resolution…

Astrophysics · Physics 2015-06-24 M. S. N. Kumar , U. S. Kamath , C. J. Davis

We have used two methods to search for surviving companions of Type Ia supernova progenitors in three Balmer-dominated supernova remnants (SNRs) in the Large Magellanic Cloud: 0519-69.0, 0505-67.9 (DEM L71), and 0548-70.4. In the first…

We report the discovery of a previously unknown massive Galactic star cluster at l=29.22, b=-0.20. Identified visually in mid-IR images from the Spitzer GLIMPSE survey, the cluster contains at least 8 late-type supergiants, based on…

Astrophysics of Galaxies · Physics 2009-11-13 Michael J. Alexander , Henry A. Kobulnicky , Dan P. Clemens , Katherine Jameson , April Pinnick , Michael Pavel