Search Publications
Revisiting Newly Large Magellanic Cloud Age-gap Star Clusters
Piatti, Andrés E.
Recently, a noticeable number of new star clusters was identified in the outskirts of the Large Magellanic Cloud (LMC) populating the so-called star-cluster age gap, a space of time (∼4-12 Gyr) where the only known star cluster is up-to-date ESO 121-SC 03. We used Survey of the Magellanic Stellar History DR2 data sets, as well as those employed to…
Evolution of galaxy scaling relations in clusters at 0.5 < z < 1.5
Böhm, A.; Dannerbauer, H.; Hoyos, C. +4 more
Aims: We present new gas kinematic observations with the OSIRIS instrument at the GTC for galaxies in the Cl1604 cluster system at z ∼ 0.9. These observations together with a collection of other cluster samples at different epochs analyzed by our group are used to study the evolution of the Tully-Fisher, velocity-size, and specific angular mo…
The precessing jets of classical nova YZ Reticuli
Blundell, Katherine M.; Lee, Steven; McLoughlin, Dominic +1 more
The classical nova YZ Reticuli was discovered in 2020 July. Shortly after this, we commenced a sustained, highly time-sampled coverage of its subsequent rapid evolution with time-resolved spectroscopy from the Global Jet Watch observatories. Its H-alpha complex exhibited qualitatively different spectral signatures in the following weeks and months…
Elemental Abundances of the Hot Atmosphere of Luminous Infrared Galaxy Arp 299
Fukazawa, Yasushi; Gu, Liyi; Zhou, Ping +8 more
Hot atmospheres of massive galaxies are enriched with metals. Elemental abundances measured in the X-ray band have been used to study the chemical enrichment of supernova remnants, elliptical galaxies, groups, and clusters of galaxies. Here we measure the elemental abundances of the hot atmosphere of luminous infrared galaxy Arp 299 observed with …
The mid-infrared Leavitt law for classical Cepheids in the Magellanic Clouds
Wuyts, Stijn; Scowcroft, Victoria; Chown, Abigail H.
The Cepheid Leavitt Law (LL), also known as the Period-Luminosity relation, is a crucial tool for assembling the cosmic distance ladder. By combining data from the OGLE-IV catalogue with mid-infrared photometry from the Spitzer Space Telescope, we have determined the 3.6 and 4.5 $\mu$m LLs for the Magellanic Clouds using ~5000 fundamental-mode cla…
2MASX J00423991 + 3017515: an offset active galactic nucleus in an interacting system
Reynolds, Christopher S.; Blecha, Laura; Smith, Krista Lynne +2 more
We present a spectroscopic and imaging study of an abnormal active galactic nucleus (AGN), 2MASX J00423991 + 3017515. This AGN is newly identified in the hard X-rays by the Swift BAT All-Sky survey and found in an edge-on disc galaxy interacting with a nearby companion. Here, we analyse the first optical spectra obtained for this system (taken in …
Probing the circumnuclear environment of NGC 1275 with high-resolution X-ray spectroscopy
Fabian, Andrew C.; Fukazawa, Yasushi; Veilleux, Sylvain +6 more
NGC 1275 is the brightest cluster galaxy (BCG) in the Perseus cluster and hosts the active galactic nucleus (AGN) that is heating the central 100 kpc of the intracluster medium atmosphere via a regulated feedback loop. Here, we use a deep (490 ks) Cycle-19 Chandra High-Energy Transmission Grating (HETG) observation of NGC 1275 to study the anatomy…
Carbon-chain molecule survey toward four low-mass molecular outflow sources
Li, Di; Qin, S. -L.; Esimbek, Jarken +4 more
We performed a carbon-chain molecule (CCM) survey toward four low-mass outflow sources, IRAS 04181+2655 (I04181), HH211, L1524, and L1598, using the 13.7 m telescope at the Purple Mountain Observatory (PMO) and the 65 m Tian Ma Radio telescope at the Shanghai Observatory. We observed the following hydrocarbons (C2H, C4H, c-C<…
The formation history of the Milky Way disc with high-resolution cosmological simulations
Lattanzi, Mario G.; Re Fiorentin, Paola; Spagna, Alessandro +3 more
We analyse from an observational perspective the formation history and kinematics of a Milky Way-like galaxy from a high-resolution zoom-in cosmological simulation that we compare to those of our Galaxy as seen by Gaia DR2 to better understand the origin and evolution of the Galactic thin and thick discs. The cosmological simulation was carried ou…
Eclipsing Binary Populations across the Northern Galactic Plane from the KISOGP Survey
Kobayashi, Naoto; Maehara, Hiroyuki; Matsunaga, Noriyuki +8 more
We present a catalog of eclipsing binaries in the northern Galactic plane from the Kiso Wide-Field Camera Intensive Survey of the Galactic Plane (KISOGP). We visually identified 7055 eclipsing binaries spread across ∼330 deg2, including 4197 W Ursa Majoris/EW-type, 1458 β Lyrae/EB-type, and 1400 Algol/EA-type eclipsing binaries. For all…