The masses of the neutron and donor star in the high-mass X-ray binary IGR J18027-2016

Aims. We report near-infrared observations of the supergiant donor to the eclipsing high mass X-ray binary pulsar IGR J18027-2016. We aim to determine its spectral type and measure its radial velocity curve and hence determine the stellar masses of the components. Methods. ESO/VLT observations of the donor utilising the NIR spectrograph ISAAC were obtained in the H and K bands. The multi-epoch H band spectra were cross-correlated with RV templates in order to determine a radial solution for the system. Results. The spectral type of the donor was confirmed as B0-1 I. The radial velocity curve constructed has a semi-amplitude of 23.8 ± 3.1 km s-1. Combined with other measured system parameters, a dynamically determined neutron star mass of 1.4  ±  0.2–1.6  ±  0.3 M⊙ is found. The mass range of the B0-B1 I donor was 18.6  ±  0.8–21.8  ±  2.4 M⊙. These lower and upper limits were obtained under the assumption that the system is viewed edge-on (i = 90° with β = 0.89) for the lower limit and the donor fills its Roche lobe (β = 1 with i = 73.1°) for the upper limit respectively.

The evolution and masses of the neutron star and donor star in the high mass X-ray binary OAO 1657−415

We report near-infrared radial velocity (RV) measurements of the recently identified donor star in the high mass X-ray binary (HMXB) system OAO 1657−415 obtained in the H band using ISAAC on the Very Large Telescope. Cross-correlation methods were employed to construct a RV curve with a semi-amplitude of 22.1 ± 3.5 km s−1. Combined with other measured parameters of this system it provides a dynamically determined neutron star (NS) mass of 1.42 ± 0.26 M⊙ and a mass of 14.3 ± 0.8 M⊙ for the Ofpe/WN9 highly evolved donor star. OAO 1657−415 is an eclipsing HMXB pulsar with the largest eccentricity and orbital period of any within its class. Of the 10 known eclipsing X-ray binary pulsars OAO 1657−415 becomes the ninth with a dynamically determined NS mass solution and only the second in an eccentric system. Furthermore, the donor star in OAO 1657−415 is much more highly evolved than the majority of the supergiant donors in other HMXBs, joining a small but growing list of HMXBs donors with extensive hydrogen depleted atmospheres. Considering the evolutionary development of OAO 1657−415, we have estimated the binding energy of the envelope of the mass donor and find that there is insufficient energy for the removal of the donor’s envelope via spiral-in, ruling out a common envelope evolutionary scenario. With its non-zero eccentricity and relatively large orbital period the identification of a definitive evolutionary pathway for OAO 1657−415 remains problematic, we conclude by proposing two scenarios which may account for OAO 1657−415 current orbital configuration.

Astrophysical parameters of the peculiar X-ray transient IGR J11215−5952

Context. The current generation of X-ray satellites has discovered many new X-ray sources that are difficult to classify within the well-described subclasses. The hard X-ray source IGR J11215−5952 is a peculiar transient, displaying very short X-ray outbursts every 165 days. Aims. To characterise the source, we obtained high-resolution spectra of the optical counterpart, HD 306414, at different epochs, spanning a total of three months, before and around the 2007 February outburst with the combined aims of deriving its astrophysical parameters and searching for orbital modulation. Methods. We fit model atmospheres generated with the fastwind code to the spectrum, and used the interstellar lines in the spectrum to estimate its distance. We also cross-correlated each individual spectrum to the best-fit model to derive radial velocities. Results. From its spectral features, we classify HD 306414 as B0.5 Ia. From the model fit, we find Teff ≈ 24 700 K and log g ≈ 2.7, in good agreement with the morphological classification. Using the interstellar lines in its spectrum, we estimate a distance to HD 306414 d ≳ 7 kpc. Assuming this distance, we derive R∗ ≈ 40 R⊙ and Mspect ≈ 30 M⊙ (consistent, within errors, with Mevol ≈ 38 M⊙, and in good agreement with calibrations for the spectral type). Analysis of the radial velocity curve reveals that radial velocity changes are not dominated by the orbital motion, and provide an upper limit on the semi-amplitude for the optical component Kopt ≲ 11 ± 6 km   s-1. Large variations in the depth and shape of photospheric lines suggest the presence of strong pulsations, which may be the main cause of the radial velocity changes. Very significant variations, uncorrelated with those of the photospheric lines are seen in the shape and position of the Hα emission feature around the time of the X-ray outburst, but large excursions are also observed at other times. Conclusions. HD 306414 is a normal B0.5 Ia supergiant. Its radial velocity curve is dominated by an effect that is different from binary motion, and is most likely stellar pulsations. The data available suggest that the X-ray outbursts are caused by the close passage of the neutron star in a very eccentric orbit, perhaps leading to localised mass outflow.

Department-store education: an acount of the training methods developed at the Boston School of Salemanship under the direction of Lucinda Wyman Prince

by Helen Rich Norton.

Short nomenclator or vocabular in English and Hebrew: composed alphabetically for the use and benefit of my pupils in particular and for the advantage of those who are desirous to obtain the knowledge of the Hebrew tongue in general, which may be that great help to understand not only ye sacred oracles in their original, but even any Jewish author (so far as concern owns) as also it may give great insight in ye tongue to those, as to compose it, a work altogether new, [ca. 1735]

Headed on the first page with the words "Nomenclatura hebraica," this handwritten volume is a vocabulary with the Hebrew word in the left column, and the English translation on the right. While the book is arranged in sections by letter, individual entries do not appear in strict alphabetical order. The small vocabulary varies greatly and includes entries like enigma, excommunication, and martyr, as well as cucumber and maggot. There are translations of the astrological signs at the end of the volume. Poem written at the bottom of the last page in different hand: "Women when good the best of saints/ that bright seraphick lovely/ she, who nothing of an angel/ wants but truth & immortality./ Verse 2: Who silken limbs & charming/ face. Keeps nature warm."

Student essay composed by Curtis Guild, 1795

Two-page handwritten essay written in English by Curtis Guild when he was an undergraduate at Harvard College. The essay is titled with a quote in Latin from Virgil, "Omnis in Ascanio cari stat cura parentis," that translates as, “All the fond Parent’s Care centers in Ascanio.” The essay begins, “The machinery of man is wonderful…” and discusses parental affection. The essay is signed “C Guild” and dated May 7, 1795.

Student essay composed by Edmund Toppan, 1795

Four-page handwritten student essay composed in English by Edmund Toppan as a Harvard undergraduate. The verso of the last page is inscribed "Toppan June 22'd 1795." The essay is titled with a quote from Horace: "Qui non moderabitur irae, Infectum volet esse, dolor quod suaserit et mens." The essay discusses the destructive force of uncontrolled passion and begins, "Last evening, having a very disagreeable head-ache, I early retired to bed."

Student essay composed by Thomas Mason, 1796

Three-page folio-sized handwritten student essay composed by Thomas Mason as a Harvard undergraduate. The verso of the last page is inscribed "Mason February 1796." A quotation from Edward Young appears at the top of the first page: "Heaven gives us friends to bless the present science; / Resumes them, to prepare us for the rest." The essay discusses friendship and the death of friends, and begins, "The author of our nature has so constituted it, that pleasure is unknown without the intervention of pain."

Student poem composed by Joseph Story, 1796

Four-page handwritten poem composed in English by Joseph Story as a Harvard undergraduate. The verso of the last page is inscribed "Story's 1796." The poem contains classical allusions and is titled with the quote: "Aut Caeusar, aut nullus." The poem begins, "In elder climes, ere science' mystic page / Gave light unfolded to a barbarous age..." The poem ends with verse about George Washington. The text includes edits and struck-through words.

Student essay attributed to William Ellery Channing, 1797 June 5

Three-page handwritten essay composed in English and attributed to Harvard undergraduate William Ellery Channing. The verso of the last page is inscribed "Channing 5 June 97." A quotation from Edward Young appears at the top of the first page: "A Competence is vital to content / Much wealth is corpulence, if not disease" and discusses the topic of affluence. The document includes edits and struck-through words.

Student poem composed by Jacob Abbot Cummings, 1799 September 16

Handwritten poem composed by Jacob Abbot Cummings when he was an undergraduate at Harvard College. The rhyming poem celebrates morning (as a metaphor for life) and describes the farmer, industrious milk maid, and market man. It begins, “Loud speaks the clarion of approaching day..." The poem is labeled "16 September 1799 Cummings" and is headed with a quote from John Milton's Paradise Lost: "Sweet in the breath of morn, her rising sweet, with song of earliest bird."

Student compositions of Washington Allston, 1799

Handwritten essay about procrastination and a poem celebrating spring composed by Washington Allston while he was an undergraduate at Harvard. The essay uses a story about a young Italian named Bernardo to discuss the consequences of procrastination. The essay is labeled “Allston Novem. ’99" and is titled with a quote from Edward Young's poem "The Complaint," “Procrastination is Theif [sic] of time.” Allston’s poem celebrates spring and incorporates Phillida and Corydon, two characters from Nicholas Breton’s poem “Phillida and Cordion.” The poem is titled with the verses, “Chief, lovely spring, in thee, and thy soft scenes, / The smiling God is seen” from James Thompson's poem “Spring.” The poem is labeled "Allston July 10, 1799."