Exoplanets and Stellar Physics: publications

NLTE AND LTE LICK INDICES FOR RED GIANTS FROM [Fe/H] 0.0 TO −6.0 AT SDSS AND IDS SPECTRAL RESOLUTION

The Astrophysical Journal American Astronomical Society 810:1 (2015) 76

Authors:

C Ian Short, Mitchell E Young, Nicholas Layden

The Red Radio Ring: a gravitationally lensed hyperluminous infrared radio galaxy at z = 2.553 discovered through the citizen science project Space Warps

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 452:1 (2015) 502-510

Authors:

JE Geach, A More, A Verma, PJ Marshall, N Jackson, P-E Belles, R Beswick, E Baeten, M Chavez, C Cornen, BE Cox, T Erben, NJ Erickson, S Garrington, PA Harrison, K Harrington, DH Hughes, RJ Ivison, C Jordan, Y-T Lin, A Leauthaud, C Lintott, S Lynn, A Kapadia, J-P Kneib, C Macmillan, M Makler, G Miller, A Montaña, R Mujica, T Muxlow, G Narayanan, DÓ Briain, T O'Brien, M Oguri, E Paget, M Parrish, NP Ross, E Rozo, CE Rusu, ES Rykoff, D Sanchez-Argüelles, R Simpson, C Snyder, FP Schloerb, M Tecza, W-H Wang, L Van Waerbeke, J Wilcox, M Viero, GW Wilson, MS Yun, M Zeballos

The initial mass functions of M31 and M32 through far red stellar absorption features

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 452:1 (2015) 597-606

Authors:

Simon Zieleniewski, Ryan CW Houghton, Niranjan Thatte, Roger L Davies

Transiting exoplanets from the CoRoT space mission XXVIII. CoRoT-33b, an object in the brown dwarf desert with 2:3 commensurability with its host star

(2015)

Authors:

Sz Csizmadia, A Hatzes, D Gandolfi, M Deleuil, F Bouchy, M Fridlund, L Szabados, H Parviainen, J Cabrera, S Aigrain, R Alonso, JM Almenara, A Baglin, P Bordé, AS Bonomo, HJ Deeg, RF Dıaz, A Erikson, S Ferraz-Mello, M Tadeu dos Santos, EW Guenther, T Guillot, S Grziwa, G Hébrard, P Klagyivik, M Ollivier, M Pätzold, H Rauer, D Rouan, A Santerne, J Schneider, T Mazeh, G Wuchterl, S Carpano, A Ofir

Constraints on southern hemisphere tropical climate change during the Little Ice Age and Younger Dryas based on glacier modeling of the Quelccaya Ice Cap, Peru

Quaternary Science Reviews Elsevier 125 (2015) 106-116

Authors:

Andrew GO Malone, Raymond Pierrehumbert, Thomas V Lowell, Meredith A Kelly, Justin S Stroup

Abstract:

© 2015 The Authors. Improving the late Quaternary paleoclimate record through climate interpretations of low-latitude glacier length changes advances our understanding of past climate change events and the mechanisms for past, present, and future climate change. Paleotemperature reconstructions at low-latitude glaciers are uniquely fruitful because they can provide both site-specific information and enhanced understanding of regional-scale variations due to the structure of the tropical atmosphere. We produce Little Ice Age (LIA) and Younger Dryas (YD) paleoclimate reconstructions for the Huancané outlet glacier of the Quelccaya Ice Cap (QIC) and low-latitude southern hemisphere regional sea surface temperatures (SSTs) using a coupled ice-flow and energy balance model. We also model the effects of long-term changes in the summit temperature and precipitiation rate and the effects of interannual climate variability on the Huancané glacier length. We find temperature to be the dominant climate driver of glacier length change. Also, we find that interannual climate variability cannot adequately explain glacier advances inferred from the geomorphic record, necessitating that these features were formed during past colder climates. To constrain our LIA reconstruction, we incorporate the QIC ice core record, finding a LIA air temperature cooling at the ice cap of between ~0.7 °C and ~1.1 °C and ~0.4 °C and regional SSTs cooling of ~0.6 °C. For the YD paleoclimate reconstructions, we propose two limits on the precipitation rate, since the ice core record does not extend into the Pleistocene: 1) the precipitation rate scales with the Clausius-Clapeyron relationship (upper limit on cooling) and 2) the precipitation rate increases by 40% (lower limit on cooling), which is an increase about twice as great as the regional increases realized in GCM simulations for the period. The first limit requires ~1.6 °C cooling in ice cap air temperatures and ~0.9 °C cooling in SSTs, and the second limit requires ~1.0 °C cooling in ice cap air temperatures and ~0.5 °C cooling in SSTs. Our temperature reconstructions are in good agreement with the magnitude and trend of GCM simulations that incorporate the forcing mechanisms hypothesized to have caused these climate change events.

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