Search Publications
First Observations of the Magnetic Field inside the Pillars of Creation: Results from the BISTRO Survey
Pattle, Kate; Ward-Thompson, Derek; Berry, David +7 more
We present the first high-resolution, submillimeter-wavelength polarimetric observations of—and thus direct observations of the magnetic field morphology within—the dense gas of the Pillars of Creation in M16. These 850 µm observations, taken as part of the B-Fields in Star-forming Region Observations Survey (BISTRO) using the POL-2 polarime…
The Strong Rotation of M5 (NGC 5904) as Seen from the MIKiS Survey of Galactic Globular Clusters
Dalessandro, E.; Valenti, E.; Bellazzini, M. +10 more
In the context of the ESO-VLT Multi-Instrument Kinematic Survey (MIKiS) of Galactic globular clusters (GGCs), we present the line-of-sight rotation curve and velocity dispersion profile of M5 (NGC 5904), as determined from the radial velocity of more than 800 individual stars observed out to 700″ (∼5 half-mass radii) from the center. We found one …
Ultraviolet Detection of the Binary Companion to the Type IIb SN 2001ig
Van Dyk, Schuyler D.; Filippenko, Alexei V.; Ryder, Stuart D. +8 more
We present HST/WFC3 ultraviolet imaging in the F275W and F336W bands of the Type IIb SN 2001ig at an age of more than 14 years. A clear point source is detected at the site of the explosion, with m F275W = 25.39 ± 0.10 and m F336W = 25.88 ± 0.13 mag. Despite weak constraints on both the distance to the host galaxy NGC 7424 an…
High-redshift Extremely Red Quasars in X-Rays
Pâris, Isabelle; Strauss, Michael A.; Brandt, William N. +11 more
Quasars may have played a key role in limiting the stellar mass of massive galaxies. Identifying those quasars in the process of removing star formation fuel from their hosts is an exciting ongoing challenge in extragalactic astronomy. In this paper, we present X-ray observations of 11 extremely red quasars (ERQs) with L bol ∼ 1047…
The Low-luminosity Type IIP Supernova 2016bkv with Early-phase Circumstellar Interaction
Tominaga, Nozomu; Itoh, Ryosuke; Takaki, Katsutoshi +22 more
We present optical and near-infrared observations of a low-luminosity (LL) Type IIP supernova (SN) 2016bkv from the initial rising phase to the plateau phase. Our observations show that the end of the plateau is extended to ≳140 days since the explosion, indicating that this SN takes one of the longest times to finish the plateau phase among Type …
Probing Dark Matter Subhalos in Galaxy Clusters Using Highly Magnified Stars
Dai, Liang; Venumadhav, Tejaswi; Kaurov, Alexander A. +1 more
Luminous stars in background galaxies straddling the lensing caustic of a foreground galaxy cluster can be individually detected due to extreme magnification factors of ∼102-103, as recently observed in deep HST images. We propose a direct method to probe the presence of dark matter subhalos in galaxy clusters by measuring th…
A Chandra/LETGS Survey of Main-sequence Stars
Warren, Harry P.; Wood, Brian E.; Poppenhaeger, Katja +1 more
We analyze the X-ray spectra of 19 main-sequence stars observed by Chandra using its LETGS configuration. Emission measure (EM) distributions are computed based on emission line measurements, an analysis that also yields evaluations of coronal abundances. The use of newer atomic physics data results in significant changes compared to past publishe…
SMASHing the LMC: Mapping a Ring-like Stellar Overdensity in the LMC Disk
Bell, Eric F.; Monachesi, Antonela; Choi, Yumi +18 more
We explore the stellar structure of the Large Magellanic Cloud (LMC) disk using data from the Survey of the MAgellanic Stellar History and the Dark Energy Survey. We detect a ring-like stellar overdensity in the red clump star count map at a radius of ∼6° (∼5.2 kpc at the LMC distance) that is continuous over ∼270° in position angle and is only li…
X-Ray Census of Millisecond Pulsars in the Galactic Field
Cheng, K. S.; Takata, J.; Kong, A. K. H. +3 more
We have conducted a systematic survey for the X-ray properties of millisecond pulsars (MSPs). Currently, there are 47 MSPs with confirmed X-ray detections. We have also placed the upper limits for the X-ray emission from the other 36 MSPs by using the archival data. We have normalized their X-ray luminosities L x and their effective p…
The SFR-M * Correlation Extends to Low Mass at High Redshift
Finkelstein, Steven L.; Koekemoer, Anton M.; Somerville, Rachel S. +8 more
To achieve a fuller understanding of galaxy evolution, SED fitting can be used to recover quantities beyond stellar masses (M *) and star formation rates (SFRs). We use star formation histories (SFHs) reconstructed via the Dense Basis method of Iyer & Gawiser for a sample of 17,873 galaxies at 0.5 < z < 6 in the Cosmic Assembl…