Articles: Recent submissions

Now showing items 21-40 of 844

Photometric variability of TW Hya from seconds to years as seen from space and the ground during 2013-2017

Siwak, M.; Ogloza, W.; Moffat, A.F.J.; Matthews, J.M.; Rusinski, S.M.; Kallinger, T.; Kushnig, R.; Cameron, C.; Weiss, W.W.; David B. Guenther (Oxford University PressRoyal Astronomical Society, 2018-06-02)

This is the final photometric study of TW Hya based on new MOST satellite observations. During 2014 and 2017, the light curves showed stable 3.75- and 3.69-d quasi-periodic oscillations, respectively. ...
On the lack of correlation between [O III]/[O II] and Lyman continuum escape fraction

Bassett, R.; Ryan-Weber, E.V.; Cooke, J.; DAaz, C.; Nanayakkara, T.; Yuan, T.; Spitler, L.; Mestric, U.; Sawicki, Marcin, 1969-; Golob, Anneya (Oxford University Press, 2018-12-10)

We present the first results of our pilot study of eight photometrically selected Lyman-continuum (LyC) emitting galaxy candidates from the COSMOS field and focus on their optical emission line ratios. Observations were ...
On the fast quenching of young low-mass galaxies up to z similar to 0.6: new spotlight on the lead role of environment

Moutard, Thibaud; Sawicki, Marcin; Arnouts, S.; Golob, Anneya; Malavasi, N.; Adami, C.; Coupon, J.; Ilbert, O. (Oxford University Press, 2018)
Observational constraints on the physical nature of submillimetre source multiplicity: chance projections are common

Hayward, C.C.; Chapman, S.C.; Steidal, C.C.; Golob, A.; Casey, C.M.; Smith, D.J.B.; Zitrin, A.; Blain, A.W.; Bremner, M.N.; Sawicki, Marcin (Oxford University Press, 2018)
Is there a UV/X-ray connection in IRAS 13224-3809?

Buisson, D.J.K.; Lohfink, A.M.; Alton, W.M.; Cackett, E.M.; Chiang, C.Y.; Dauser, T.; De Marco, B.; Fabian, A.C.; Gallo, Luigi C.; Garcia, J.A. (Oxford University Press on behalf of the Royal Astronomical Society, 2018-01-05)

We present results from the optical, ultraviolet, and X-ray monitoring of the NLS1 galaxy IRAS 13224−3809 taken with Swift and XMM–Newton during 2016. IRAS 13224−3809 ...
On stellar mass loss from galaxies in groups and clusters

Tollet, E.; Cattaneo, A.; Mamon, G.A.; Moutard, Thibaud; van den Bosch, F.C. (Oxford University Press, 2017-07-20)

We estimate the stellar mass that satellite galaxies lose once they enter groups (and clusters) by identifying groups in a high-resolution cosmological N-body simulation, assigning entry masses to satellite ...
Eleven years of monitoring the Seyfert 1 Mrk 335 with Swift: Characterizing the X-ray and UV/optical variability

Gallo, Luigi C.; Blue, D.M.; Grupe, D.; Komossa, S.; Wilkins, D.R. (Oxford University Press, 2018)
Constraining the geometry of AGN outflows with reflection spectroscopy

Parker, M.L.; Buisson, D.J.K.; Jiang, J.; Gallo, Luigi C.; Kara, E.; Matzeu, G.A.; Walton, D.J. (Oxford University PressRoyal Astronomical Society, 2018-06-01)

We collate active galactic nuclei (AGN) with reported detections of both relativistic reflection and ultrafast outflows. By comparing the inclination of the inner disc from reflection with the line-of-sight velocity of the ...
Conflicting edge influence on herbaceous species in open areas vs. underneath oak trees in forest fragments in Iran

Valadi, Gelareh; Rad, Javad Eshaghi; Khodakarami, Yahia; Harper, Karen A., 1969- (Springer, 2023-11-29)

Since the type of forest influences vegetation patterns from the edge-to-interior forest, site-specific edge studies are needed but there have been few studies in open-canopied forests such as oak savannahs. Our ...
Vegetation patterns across edges of bogs and lakes in spruce and hemlock forests of southwestern Nova Scotia

Harper, Karen A., 1969-; Butler, Wendy; O’Handley, Kaitlyn (Springer, 2023-11-07)

Although forest edges surrounding lakes and wetlands are common in many heterogeneous landscapes, there are few studies on patterns of vegetation across these natural landscape boundaries. We investigated forest structure, ...
Limited influence from edges and topography on vegetation structure and diversity in Atlantic Forest

Harper, Karen A.,1969-; Yang, Jacqueline Renée; Dazé Querry, Natasha; Dyer, Julie; Alves, Rafael Souza Cruz; Ribeiro, Milton Cezar (Springer, 2023-09-25)

Although Atlantic Forest is diverse and heavily fragmented, little is known about the impact of edges created from fragmentation on forest structure and plant diversity. Our investigation of vegetation at agricultural edges ...
Abundance and arboreal tendencies of slugs in forested wetlands of southwestern Nova Scotia, Canada

Reis Medeiros, Hugo; Maunder, John; Haughian, Sean; Harper, Karen A., 1969- (Ottawa Field Naturalists Club, 2022-01-21)

Non-native slugs, such as Arion, are becoming a concern for land managers in Nova Scotia, Canada, particularly in forested wetlands. They appear to have a highly diverse diet and may pose a particular risk to ...
Classical Cepheids and the Spiral Structure of the Milky Way

Dambis, A.K.; Berdnikov, L.N.; Efremov, Yu M.; Kniazev, A. Yu; Rastorguev, A.S.; Glushkova, E.V.; Kravtsov, V.V.; Turner, David Gerald, 1945-; Majaess, Daniel J.; Sefako, R. (Pleiades Publishing, 2015-09-13)

We use data on space distribution of the currently most complete sample of Cepheids with reliable distances (565 stars), located within ~5 kpc from the Sun, to study the spiral pattern of the Milky Way galaxy. We ...
Rating impacts in a multi-stressor world: a quantitative assessment of 50 stressors affecting the Great Lakes

Smith, Sigrid D. P.; McIntyre, Peter B.; Halpern, Benjamin S.; Cooke, Roger M.; Marino, Adrienne L.; Boyer, Gregory L.; Buchsbaum, Andy; Burton, G. A.; Campbell, Linda M., 1970-; iborowski, Jan J. H. (Ecological Society of America, 2015-04-01)

Ecosystems often experience multiple environmental stressors simultaneously that can differ widely in their pathways and strengths of impact. Differences in the relative impact of environmental stressors can guide restoration ...
A construction which relates c-freeness to infinitesimal freeness

Février, Maxime; Mastnak, Mitja; Nica, Alexandru; Szpojankowski, Kamil (Elsevier Inc, 2015-08-2)

We consider two extensions of free probability that have been studied in the research literature, and are based on the notions of c-freeness and respectively of infinitesimal freeness for noncommutative random ...
A dense, solar metallicity ISM in the z=4.2 dusty star-forming galaxy SPT 0418-47

De Breuck, Carlos; Weiß, Axel; Béthermin, Matthieu; Cunningham, Daniel J. M.; Apostolovski, Yordanka; Aravena, Manuel; Archipley, Melanie; Chapman, Scott C.; Chen, Chian-Chou; Fu, Jianyang (EDP Sciences, 2019-11-15)

We present a study of six far-infrared fine structure lines in the z = 4.225 lensed dusty star-forming galaxy SPT 0418−47 to probe the physical conditions of its interstellar medium (ISM). In particular, we report Atacama ...
hCOSMOS: A Dense Spectroscopic Survey of r <= 21.3 Galaxies in the COSMOS field

Damjanov, Ivana; Zahan, H. Jabran; Gellar, Margaret J.; Fabricant, Daniel J.; Hwang, Ho Seong (Cornell University Library, arXiv.org, 2017-10)

We describe the hCOSMOS redshift survey of the COSMOS field conducted with the Hectospec spectrograph on the MMT. In the central 1~deg $^2$ , the hCOS20.6 subset of the survey is $>90\%$ complete to a limiting $r=20.6$ . The ...
Imaging the molecular interstellar medium in a gravitationally lensed star-forming galaxy at z = 5.7

Apostolovski, Yordanka; Aravena, Manuel; Anguita, Timo; Spilker, Justin; Weiß, Axel; Béthermin, Matthieu; Chapman, Scott C.; Chen, Chian-Chou; Cunningham, Daniel J. M.; De Breuck, Carlos (The American Astronomical Society, 2019-07-30)

Aims. We present and study spatially resolved imaging obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) of multiple ¹²CO(J = 6 − 5, 8−7, and 9−8) ...
ChromaStarPy: A Stellar Atmosphere and Spectrum Modeling and Visualization Lab in Python

Short, C. Ian; Bayer, Jason H.T.; Burns, Lindsey M. (The American Astronomical Society, 2018-02-20)

We announce ChromaStarPy, an integrated general stellar atmospheric modeling and spectrum synthesis code written entirely in python V. 3. ChromaStarPy is a direct port of the ChromaStarServer (CSServ) Java modeling code ...
Concentric Circles and Spiral Configurations for Large Correlator Arrays in Radio Astronomy

Kiehbadroudinezhad, Shahideh; Cada, Michael; Chen, Zhizhang (David); Shahabi, Adib; Short, C. Ian; Abidin, Zamri Zainal; Kiehbadroudinezhad, Samiramis (IOP Publishing, 2018-10)

Aperture synthesis arrays are commonly used in radio astronomy to take images of radio point sources, with the planned Square Kilometre Array (SKA) being the most common example. One approach to enhancing the quality of ...